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SiENBE28-901 Service Manual Air Cooled Refrigeration Condensing Unit LRLEQ5AY1(E) LRLEQ6AY1(E) LRLEQ8AY1(E) LRLEQ10AY1(E) LRLEQ12AY1(E) LRLEQ15AY1(E) LRLEQ20AY1(E) LRMEQ5AY1(E) LRMEQ6AY1(E) LRMEQ8AY1(E) LRMEQ10AY1(E) LRMEQ12AY1(E) LRMEQ15AY1(E) LRMEQ20AY1(E) SiENBE28-901 Air Cooled Refrigeration Condensing Unit LRMEQ5AY1, 6AY1, 8AY1, 10AY1, 12AY1, 15AY1, 20AY1 LRLEQ5AY1, 6AY1, 8AY1, 10AY1, 12AY1, 15AY1, 20AY1 Air Cooled Refrigeration Condensing Unit 1 1 LRMEQ5AY1, 6AY1, 8AY1, 10AY1, 12AY1, 15AY1, 20AY1 1 LRLEQ5AY1, 6AY1, 8AY1, 10AY1, 12AY1, 15AY1, 20AY1 1 1. Introduction .............................................................................................2 2. Standard Specification ............................................................................7 2.1 2.2 2.3 2.4 2.5 2.6 Standard Specification .............................................................................7 Set Values for Functional Components and Protection Devices............13 Operation Limits .....................................................................................14 Wiring Diagram.......................................................................................15 Piping Diagram.......................................................................................18 Description and Layout of Functional Parts and Piping Diagram ...........21 3. Field Settings ........................................................................................30 3.1 Field Setting From Outdoor Unit.............................................................30 4. Description of Functions and Operation................................................40 4.1 Operating Mode......................................................................................40 4.2 Outline of Functions ...............................................................................47 4.3 Detailed Description of Functions...........................................................48 5. Test Operation ......................................................................................57 5.1 5.2 5.3 5.4 5.5 5.6 Refrigerant Piping...................................................................................57 Field Wiring ............................................................................................63 Inspection and Pipe Insulation ...............................................................66 Checks after Work Completion...............................................................69 Additional Refrigerant Charge ................................................................69 Test Run.................................................................................................71 6. Troubleshooting ....................................................................................73 6.1 6.2 6.3 6.4 6.5 6.6 6.7 Checking Points at Servicing..................................................................73 List of Malfunction Codes .......................................................................76 Checking Malfunction Codes by LED Lamps on PCB............................77 Checking Malfunction Codes of the Condensing Unit ............................79 Troubleshooting by RAM Monitor...........................................................80 Flow Chart for Troubleshooting ..............................................................84 Maintenance.........................................................................................141 7. Appendix (Supplementary Information)...............................................149 7.1 7.2 7.3 7.4 Restriction Matter of Showcase............................................................149 Selection of Expansion Valve...............................................................149 Trouble Case with Present Machine (R-407C).....................................150 Option List ............................................................................................154 Air Cooled Refrigeration Condensing Unit 1 Introduction SiENBE28-901 1. Introduction Safety Precautions Before performing design, construction, or maintenance, thoroughly read the "Safety Precautions" and also the "Installation Manual" and "Operation Manual" that come with this product. Precautions are classified as " WARNING" or " CAUTION" for the purpose of this Section. Items that mishandling highly potentially induces serious consequences such as death or serious injury are specially described under " WARNING". Furthermore, even items described under " CAUTION" potentially induce serious consequences depending on circumstances. All are important items for safety and must be followed without fail. Pictograms This symbol alerts you to precautions to be taken. Sections under this symbol provide the specific descriptions of precautions. This symbol alerts you to prohibited acts. Sections under or in the vicinity of this symbol provide the specific descriptions of prohibited acts. This symbol alerts you to mandatory acts or instructions. Sections under or in the vicinity of this symbol provide the specific descriptions of instructions. After the completion of construction or repair work, conduct test run on the equipment to check it for any abnormalities, and also explain precautions for use of the equipment to customer. <I. Precautions for Construction and Repair> WARNING (1) To overhaul the equipment, be sure to turn OFF all power supplies. Not doing so will result in an electric shock. To repair the equipment or check for circuits with power applied, pay utmost attention not to touch any live part. (2) If a refrigerant gas belches during work, do not touch the refrigerant gas. Doing so will result in frostbite. (3) To remove a welded part from the suction or discharge pipe of compressor, remove it in a well-ventilated area after thoroughly discharging a refrigerant gas. gas or refrigerant oil to belch, thus resulting in injury. (4) If a refrigerant gas leaks during work, ventilate the working area. If the refrigerant gas comes into contact with a flame, toxic gas will be generated. (5) The electrical parts of outdoor unit carry a high voltage. To repair these parts, thoroughly discharge electricity from the capacitor. Not doing so will result in an electric shock. Not doing so will cause the refrigerant 2 Air Cooled Refrigeration Condensing Unit SiENBE28-901 Introduction CAUTION (6) Do not start or stop the air conditioner using the POWER SUPPLY switch. Doing so may result in a failure or water leakage. (10) To clean the equipment, be sure to set the POWER SUPPLY switch to "OFF" to turn OFF all power supplies. Not doing so may result in injury because the internal fan rotates at high speeds. (7) Do not repair electrical parts with wet hand. Doing so may result in an electric shock. (11) To dismount the equipment, pay careful attention not to tilt it. Tilting the equipment may cause water remaining in the equipment to fall in drops, thus wetting goods kept in storage. (12) Check whether or not the refrigerating cycle part gets hot, and then repair the equipment. (8) Do not wash the air conditioner in water. Doing so may result in an electric shock or a fire. Not doing so may result in a burn. (9) Be sure to establish a ground for the equipment. (13) Use a welder in wellventilated areas. Using the welder in an enclosed room may result in lack of oxygen. Not doing so may result in an electric shock. <II. Precautions for Equipment after Construction and Repair> WARNING (14) To repair the equipment, be sure to use parts listed in the List of Service Parts for the applicable model and proper tools. Furthermore, NEVER make any modification to the equipment. Not observing this warning will result in an electric shock, heat generation, or a fire. Air Cooled Refrigeration Condensing Unit (15) To install or relocate an air conditioner, select a location capable of supporting the weight of the air conditioner. The insufficient strength of the location or improper installation of the air conditioner will cause the unit to drop, thus resulting in injury. 3 Introduction SiENBE28-901 WARNING (16) Conduct electrical works according to information in the "Electrical Equipment Technical Standards", "Internal Wiring Regulations", and Installation Manual, and further be sure to use dedicated circuits. Insufficient capacity of the power supply circuit and faulty electrical works will result in an electric shock or a fire. (17) To make wirings between indoor and outdoor units, use specified wires to securely connect them, and fix them so that the external force of cables will not be transmitted to terminal connections. Imperfect connections or fixing will result in heat generation or a fire. (18) To make wirings between indoor and outdoor units or for power supply, form wires so that structures such as the service lid will not be lifted, and properly mount the lid. Improperly mounting the lid will result in heat generation of the terminal part, an electric shock, or a fire. (19) Do not cause damage to or process the power supply cord. Doing so will result in an electric shock or a fire. Putting heavy things on, heating, or pulling the power supply cord will result in damage to it. (20) Do not cause anything other than the specified refrigerant (e.g. air) to get mixed in the refrigerant system. Doing so will cause the refrigerant system to have abnormally high internal pressure, thus resulting in damage to the equipment or bodily injury. (21) Should the equipment have leakage of refrigerant gas, locate leaking points, and then repair them without fail. Subsequently, refill the equipment with a specified quantity of refrigerant. If no leaking points are located and thereby repair work is to be discontinued, perform pump-down operation, and then close the service valve. Not doing so will result in refrigerant gas leakage. The refrigerant gas itself is harmless, but if it comes into contact with a flame from a fan heater, stove, or stove burner, toxic gas will be generated. CAUTION (22) A ground leakage circuit breaker needs to be mounted. Mounting no ground leakage circuit breaker may result in an electric shock or a fire. 4 (23) Do not install the equipment in places with the potential for leakage of flammable gas. Should a flammable gas leak to accumulate around the equipment, the gas may catch fire. Air Cooled Refrigeration Condensing Unit SiENBE28-901 Introduction <III. Precautions after Construction and Repair> WARNING (24) Check power supply terminals for deposition of dust or for any loose terminals. Deposition of dust on or imperfect connections of the terminals will result in an electric shock or a fire. Not doing so will result in an electric shock, heat generation, or a fire. (26) Do not connect the power supply cord halfway or with many loads of other electrical fittings on one electric outlet. (25) Be sure to replace flawed or deteriorated power supply cord or lead wires. Doing so will result in an electric shock, heat generation, or a fire. CAUTION (27) Check to be sure that the mounting positions and wiring conditions of parts as well as the connections of soldered parts and crimpstyle terminals are all normal. If any of these items is abnormal, an electric shock, heat generation, or a fire may result. (28) If the installation base or mounting frames are reduced in strength due to corrosion, replace them. (30) After the completion of repair, be sure to make measurement of insulation resistance to prove that it is not less than 1MΩ. Insulation failures may result in an electric shock. (31) After the completion of repair, be sure to check the indoor unit for drainage. Insufficient draining from the indoor unit may result in the entry of water into a room, thus wetting furniture and household goods. Not doing so may cause the equipment to drop, thus resulting in injury. (29) Check for the grounding state. If the ground is in an imperfect state, rectify it. Imperfect ground may result in an electric shock. Air Cooled Refrigeration Condensing Unit 5 Introduction SiENBE28-901 Air Cooled Refrigeration Condensing Unit Nomenclature Outdoor unit LR M E Q 5 A Y1 Power supply symbol Y1: 3φ 380-415V, 50Hz Indicates major design category Capacity indication 5: 5HP Refrigerant Q: R-410A Compressor type E: Intermediate INJ type Temperature zone to be used M: Medium temperature (MT) L: Low temperature (LT) Product category L: Low temperature air conditioner R: Outdoor unit 6 Air Cooled Refrigeration Condensing Unit SiENBE28-901 Standard Specification 2. Standard Specification 2.1 Standard Specification LRMEQ5AY1 [LRMEQ5AY1E] Model 1 Power Supply 3 phase 50Hz 380-415V Capacity 2 kW Range of Suction Pressure Equivalent Saturation Temperature °C Range of Outdoor Temperature °C Casing Color 12.2 -20~+10 -15~+43 mm 1680×635×765 Heat Exchanger Cross fin coil Type Piston Displacement Compressor Number of Revolutions Motor Output × Number of Units Hermetically sealed scroll type m3/h 10.04 13.85 r.p.m 4740 6540 kW 2.3 Starting Method Propeller fan Motor Output kW Air Flow Rate m3/min 0.35×1 95 Drive Liquid Pipe φ9.5 C1220T (Brazing connection) Gas Pipe φ19.1 C1220T (Brazing connection) Mass 5.4 kg Capacity Control 175 High Pressure Switch, Fan Driver Overload Protector, Overcurrent Relay, Inverter Overload Protector, Fusible Plug Safety Devices Refrigerant Oil 102 Direct drive Receiver Volume Refrigerant 3.2 Direct-on-line (Inverter system) Type Connecting Pipes 14.4 Ivory white (5Y7.5/1) [Light camel (2.5Y6.5/1.5)] Dimensions: (H×W×D) Fan LRMEQ6AY1 [LRMEQ6AY1E] % 33~100 Refrigerant Name Charge Volume kg 5.2 Refrigerant Oil Name Charge Volume Operating Sound 3 24~100 R410A DAPHNE FVC68D L dBA Standard Accessories 1.7+2.5 54 56 Installation Manual, Operation Manual, Connection Pipes, Clamps Notes: H1 [ ] shows the anti-corrosion treatment type. H2 Rated conditions of the refrigeration equipment : Saturated temperature equivalent to suction pressure: -10°C Outdoor air: 32°C, Suction SH: 10°C H3 Measurement place: Front: 1m, Height: 1.5m 4 The minimum connection load with inside unit: 2.0kW Air Cooled Refrigeration Condensing Unit 7 Standard Specification SiENBE28-901 LRMEQ8AY1 [LRMEQ8AY1E] Model 1 Power Supply kW Range of Suction Pressure Equivalent Saturation Temperature °C Range of Outdoor Temperature °C 18.6 21.8 -15~+43 Ivory white (5Y7.5/1) [Light camel (2.5Y6.5/1.5)] Dimensions: (H×W×D) mm 1680×930×765 Heat Exchanger Cross fin coil Type Piston Displacement Compressor Number of Revolutions Motor Output × Number of Units Hermetically sealed scroll type m3/h 19.68 23.36 25.27 r.p.m 4320, 2900 6060, 2900 6960, 2900 kW 2.1+3.6 3.0+3.6 3.4+3.6 Starting Method Direct-on-line (Inverter system) Type Propeller fan Motor Output kW Air Flow Rate m3/min 0.75×1 171 Drive Liquid Pipe φ9.5 C1220T (Brazing connection) Gas Pipe φ25.4 C1220T (Brazing connection) Mass Capacity Control 255 High Pressure Switch, Fan Driver Overload Protector, Overcurrent Relay, Inverter Overload Protector, Fusible Plug % 17~100 Refrigerant Name Charge Volume Charge Volume 14~100 13~100 R410A kg 7.9 Refrigerant Oil Name Operating Sound 3 191 8.1 kg Safety Devices Refrigerant Oil 179 Direct drive Receiver Volume Refrigerant 24.4 -20~+10 Casing Color Connecting Pipes LRMEQ12AY1 [LRMEQ12AY1E] 3 phase 50Hz 380-415V Capacity 2 Fan LRMEQ10AY1 [LRMEQ10AY1E] DAPHNE FVC68D L dBA Standard Accessories 1.7+2.1+3.0 57 59 61 Installation Manual, Operation Manual, Connection Pipes, Clamps Notes: H1 [ ] shows the anti-corrosion treatment type. H2 Rated conditions of the refrigeration equipment : Saturated temperature equivalent to suction pressure: -10°C Outdoor air: 32°C, Suction SH: 10°C H3 Measurement place: Front: 1m, Height: 1.5m 4 The minimum connection load with inside unit: 2.0kW 8 Air Cooled Refrigeration Condensing Unit SiENBE28-901 Standard Specification LRMEQ15AY1 [LRMEQ15AY1E] Model 1 Power Supply 3 phase 50Hz 380-415V Capacity 2 kW Range of Suction Pressure Equivalent Saturation Temperature °C Range of Outdoor Temperature °C Casing Color 32.2 37.0 -20~+10 -15~+43 Ivory white (5Y7.5/1) [Light camel (2.5Y6.5/1.5)] Dimensions: (H×W×D) mm 1680×1240×765 Heat Exchanger Cross fin coil Type Piston Displacement Compressor Number of Revolutions Motor Output × Number of Units Hermetically sealed scroll type m3/h 30.00 35.80 r.p.m 5640, 2900 6960, 2900 kW 2.8+3.6+3.6 Starting Method Propeller fan Motor Output kW Air Flow Rate m3/min 0.75×2 230 Drive Connecting Pipes Liquid Pipe φ12.7 C1220T (Brazing connection) Gas Pipe φ31.8 C1220T (Brazing connection) Mass 12.1 kg Capacity Control 355 High Pressure Switch, Fan Driver Overload Protector, Overcurrent Relay, Inverter Overload Protector, Fusible Plug Safety Devices Refrigerant Oil 240 Direct drive Receiver Volume Refrigerant 3.4+3.6+3.6 Direct-on-line (Inverter system) Type Fan LRMEQ20AY1 [LRMEQ20AY1E] % 10~100 Refrigerant Name Charge Volume kg 11.5 Refrigerant Oil Name Charge Volume Operating Sound 3 9~100 R410A DAPHNE FVC68D L dBA Standard Accessories 1.7+2.1+2.1+4.0 62 63 Installation Manual, Operation Manual, Connection Pipes, Clamps Notes: H1 [ ] shows the anti-corrosion treatment type. H2 Rated conditions of the refrigeration equipment : Saturated temperature equivalent to suction pressure: -10°C Outdoor air: 32°C, Suction SH: 10°C H3 Measurement place: Front: 1m, Height: 1.5m 4 The minimum connection load with inside unit: 2.0kW Air Cooled Refrigeration Condensing Unit 9 Standard Specification SiENBE28-901 LRLEQ5AY1 [LRLEQ5AY1E] Model 1 Power Supply 3 phase 50Hz 380-415V Capacity 2 kW Range of Suction Pressure Equivalent Saturation Temperature °C Range of Outdoor Temperature °C Casing Color 5.4 -45~-20 -15~+43 mm 1680×635×765 Heat Exchanger Cross fin coil Type Piston Displacement Compressor Number of Revolutions Motor Output × Number of Units Hermetically sealed scroll type m3/h 10.04 13.85 r.p.m 4740 6540 kW 2.3 Starting Method Propeller fan Motor Output kW Air Flow Rate m3/min 0.35×1 95 Drive Liquid Pipe φ9.5 C1220T (Brazing connection) Gas Pipe φ19.1 C1220T (Brazing connection) Mass 5.4 kg Capacity Control 175 High Pressure Switch, Fan Driver Overload Protector, Overcurrent Relay, Inverter Overload Protector, Fusible Plug Safety Devices Refrigerant Oil 102 Direct drive Receiver Volume Refrigerant 3.2 Direct-on-line (Inverter system) Type Connecting Pipes 6.3 Ivory white (5Y7.5/1) [Light camel (2.5Y6.5/1.5)] Dimensions: (H×W×D) Fan LRLEQ6AY1 [LRLEQ6AY1E] % 33~100 Refrigerant Name Charge Volume kg 5.2 Refrigerant Oil Name Charge Volume Operating Sound 3 24~100 R410A DAPHNE FVC68D L dBA Standard Accessories 1.7+2.5 54 56 Installation Manual, Operation Manual, Connection Pipes, Clamps Notes: H1 [ ] shows the anti-corrosion treatment type. H2 Rated conditions of the refrigeration equipment : Saturated temperature equivalent to suction pressure: -35°C Outdoor air: 32°C, Suction SH: 10°C H3 Measurement place: Front: 1m, Height: 1.5m 4 The minimum connection load with inside unit: 1.6kW 10 Air Cooled Refrigeration Condensing Unit SiENBE28-901 Standard Specification LRLEQ8AY1 [LRLEQ8AY1E] Model 1 Power Supply kW Range of Suction Pressure Equivalent Saturation Temperature °C Range of Outdoor Temperature °C 8.0 9.4 -15~+43 Ivory white (5Y7.5/1) [Light camel (2.5Y6.5/1.5)] Dimensions: (H×W×D) mm 1680×930×765 Heat Exchanger Cross fin coil Type Piston Displacement Compressor Number of Revolutions Motor Output × Number of Units Hermetically sealed scroll type m3/h 19.68 23.36 25.27 r.p.m 4320, 2900 6060, 2900 6960, 2900 kW 2.1+3.6 3.0+3.6 3.4+3.6 Starting Method Direct-on-line (Inverter system) Type Propeller fan Motor Output kW Air Flow Rate m3/min 0.75×1 171 Drive Liquid Pipe φ9.5 C1220T (Brazing connection) Gas Pipe φ25.4 C1220T (Brazing connection) Mass Capacity Control 255 High Pressure Switch, Fan Driver Overload Protector, Overcurrent Relay, Inverter Overload Protector, Fusible Plug % 17~100 Refrigerant Name Charge Volume Charge Volume 14~100 13~100 R410A kg 7.9 Refrigerant Oil Name Operating Sound 3 191 8.1 kg Safety Devices Refrigerant Oil 179 Direct drive Receiver Volume Refrigerant 10.3 -45~-20 Casing Color Connecting Pipes LRLEQ12AY1 [LRLEQ12AY1E] 3 phase 50Hz 380-415V Capacity 2 Fan LRLEQ10AY1 [LRLEQ10AY1E] DAPHNE FVC68D L dBA Standard Accessories 1.7+2.1+3.0 57 59 61 Installation Manual, Operation Manual, Connection Pipes, Clamps Notes: H1 [ ] shows the anti-corrosion treatment type. H2 Rated conditions of the refrigeration equipment : Saturated temperature equivalent to suction pressure: -35°C Outdoor air: 32°C, Suction SH: 10°C H3 Measurement place: Front: 1m, Height: 1.5m 4 The minimum connection load with inside unit: 1.6kW Air Cooled Refrigeration Condensing Unit 11 Standard Specification SiENBE28-901 LRLEQ15AY1 [LRLEQ15AY1E] Model 1 Power Supply 3 phase 50Hz 380-415V Capacity 2 kW Range of Suction Pressure Equivalent Saturation Temperature °C Range of Outdoor Temperature °C Casing Color 13.6 15.1 -45~-20 -15~+43 Ivory white (5Y7.5/1) [Light camel (2.5Y6.5/1.5)] Dimensions: (H×W×D) mm 1680×1240×765 Heat Exchanger Cross fin coil Type Piston Displacement Compressor Number of Revolutions Motor Output × Number of Units Hermetically sealed scroll type m3/h 30.00 35.80 r.p.m 5640, 2900 6960, 2900 kW 2.8+3.6+3.6 Starting Method Propeller fan Motor Output kW Air Flow Rate m3/min 0.75×2 230 Drive Connecting Pipes Liquid Pipe φ12.7 C1220T (Brazing connection) Gas Pipe φ31.8 C1220T (Brazing connection) Mass 12.1 kg Capacity Control 355 High Pressure Switch, Fan Driver Overload Protector, Overcurrent Relay, Inverter Overload Protector, Fusible Plug Safety Devices Refrigerant Oil 240 Direct drive Receiver Volume Refrigerant 3.4+3.6+3.6 Direct-on-line (Inverter system) Type Fan LRLEQ20AY1 [LRLEQ20AY1E] % 10~100 Refrigerant Name Charge Volume kg 11.5 Refrigerant Oil Name Charge Volume Operating Sound 3 9~100 R410A DAPHNE FVC68D L dBA Standard Accessories 1.7+2.1+2.1+4.0 62 63 Installation Manual, Operation Manual, Connection Pipes, Clamps Notes: H1 [ ] shows the anti-corrosion treatment type. H2 Rated conditions of the refrigeration equipment : Saturated temperature equivalent to suction pressure: -35°C Outdoor air: 32°C, Suction SH: 10°C H3 Measurement place: Front: 1m, Height: 1.5m 4 The minimum connection load with inside unit: 1.6kW 12 Air Cooled Refrigeration Condensing Unit SiENBE28-901 2.2 Standard Specification Set Values for Functional Components and Protection Devices Component Inverter Compressor STD1 STD2 Electric symbol Type Overcurrent protection device Type Overcurrent protection device Type Overcurrent protection device Output Fan motor Overcurrent protection device Output Overcurrent protection device PCB M2C M3C M1F M2F A1P PCB for compressor INV A3P JT17GFKTNYE@SB — 13A — — — — 1.5A 3.0A — — 750W — — 3.0A Standard:EB09058 Standard:PC0509-2 A7P — EB0292(C) — A9P EC0729(A)-29 UKV-A023 UKV-A023 UKV-A024 DC12V, 0.26A DC12V, 0.26A DC12V, 0.26A UKV-32D49 0~480pls Coil Y2E (Gas) UKV-A023 UKV-A023 UKV-A024 DC12V, 0.26A DC12V, 0.26A DC12V, 0.26A UKV-18D20 Body 0~480pls Coil Y3E (M1C) Body Coil Four way valve Body Coil Body Solenoid valve Coil Body Type Set value Type High pressure switch Pressure protection device Set value Type Set value UKV-A023 UKV-A024 — DC12V, 0.26A DC12V, 0.26A — UKV-32D49 Y3S Y2S (M2C) Y5S (M3C) S1PH S2PH S3PH 0~480pls STF-G01AQ531A1 STF-G01AQ532A1 STF-0404G STF-0713G STF-G01AQ537A1 STF2011G — NEV-MOAJ562D1 NEV-MOAJ562D1 — VPV-603D VPV-603D — — NEV-MOAJ562C1 — — VPV-603D ACB-1TB29W ACB-1TB28W ACB-1TB27W OFF 3.8 +0 -0.1 MPa — ON 2.85±0.15MPa ACB-1TB27W — OFF 3.8 +0 -0.1 ACB-1TB27W MPa ON 2.85±0.15MPa — — ACB-1TB27W — — OFF 3.8 -0.1 MPa ON 2.85±0.15MPa +0 ACB-JB285 S4PH DC5V ON: 2.96 +0 -0.1 MPa OFF: 2.16±0.15MPa Low pressure sensor S1NPL 150NH4-L2 200NH4-L2 200NH4-L2 High pressure sensor S1NPH 150NH4-H4 150NH4-H4 200NH4-H4 Fusible plug Thermistor — — Type Set value EB0292(C) EC0726(A)-9 Body Electronic expansion valve PC0511-2(A) FN354-H-1(A) — Y1E (Main) PC0511-1(A) — EB0568(A) A6P Coil 13A 750W — A2P JT17GFKTNYE@SB 350W A8P PCB for noise filter PCB for earth leakage detection 14.7A — PC0511-3(A) A5P LRMEQ15AY1,20AY1 LRLEQ15AY1,20AY1 JT1GFDKTNYR@SB A4P PCB for operation input PCB for current sensor LRMEQ8AY1,10AY1,12AY1 LRLEQ8AY1,10AY1,12AY1 M1C Main PCB PCB for fan INV LRMEQ5AY1,6AY1 LRLEQ5AY1,6AY1 — Open: 70~75°C Outdoor air thermistor R1T ST8603 Suction pipe thermistor R2T ST0602 Outdoor heat exchanger outlet thermistor R3T ST8602A Subcooling heat exchanger outlet thermistor R5T ST0601 Subcooling heat exchanger inlet thermistor R6T ST0601 R31T Discharge pipe thermistor ST0901 R32T — R33T — ST0901 — Fuse (A1P) F1U, F2U 250VAC 3.15A, Class T Fuse F3U, F4U 250VAC 1.0A, Class T S1S AR22PR-311B Z9 Operation switch Air Cooled Refrigeration Condensing Unit ST0901 13 Standard Specification 2.3 SiENBE28-901 Operation Limits LRLEQ5, 6, 8, 10, 12, 15, 20AY1(E) 43 40 30 25 20 15 10 5 0 Range for pull down operation Range for continuous operation Outdoor temperature (°CDB) 35 -5 -10 -15 -45 -40 -35 -30 -25 -20 -15 5 10 30 35 40 Evaporating temperature (°C) 4D064913 LRMEQ5, 6, 8, 10, 12, 15, 20AY1(E) 43 40 Range for pull down operation 30 Range for continuous operation Outdoor temperature (°CDB) 35 25 20 15 10 5 0 -5 -10 -15 -20 -15 -10 -5 0 5 10 30 35 40 Evaporating temperature (°C) 4D064914 NOTES ∗1. “Range for continuous operation” SHOWS POSSIBLE RANGE OF CONTINUOUS OPERATION. ∗2. “Range for pull down operation” SHOWS POSSIBLE RANGE OF SHORT-TIME OPERATION. • DO NOT SELECT THE MODEL IN THE RANGE FOR PULL DOWN OPERATION. • TO BE MORE THAN 3°C/HOUR THAT THE TEMPERATURE OF INDOOR UNIT DROPS. DO NOT OPEN THE DOOR AND DO NOT ENTER THE GOODS IN PULL DOWN OPERATION AS MUCH AS. 14 Air Cooled Refrigeration Condensing Unit X1A X2A RY1 X3A NOTE)10 A9P BLK RED L1 L2 L3 N WHT T2A N=1 : TERMINAL STRIP 3. X400A A2P M1C MS 3~ V U R50 R59 C66 C63 : CONNECTOR Z3C N=5 WHT P2 L1R WHT P1 A3P K4M W Z10C N=4 GRN GRN X5A P3 N3 t° R1T BLK RED X1A Z5C N=1 F1U P1 Z2C N=1 X1A X3A X5A A4P Z4C N=1 X4A X6A X61A X402A BLK BLU RED M1F MS 3~ 5 5 F2U F1U X2A X4A X2A V1R R10 N1 X20A X28A X1A A1P : PROTECTIVE EARTH (SCREW) X111A X41A : TERMINAL X11A V1R R95 K1R V2R PS X1A X10A K2M X403A C1 X401A F400U K3R Z1F WHT CAPACITOR REFER TO TECHNICAL GUIDE FOR THE OPERATION TIMING DIAGRAM. 10. RY1 POINT CONTACT IS OPEN BEFORE TURNING ON POWER SUPPLY. MAGNETIC RELAY MAGNETIC CONTACTOR (M1C) K2M, K4M PILOTLAMP (SERVICE MONITOR-GREEN) K1R, K3R HAP H1P~8P PILOTLAMP (SERVICE MONITOR-ORANGE) [H2P] MALFUNCTION DETECTION --- LIGHT UP FUSE (T, 6.3A, 250V) (A2P) F400U DIP SWITCH (A1P) CAPACITOR (A3P) 7. HOW TO USE BS1~5 AND DS1 AND DS2 SWITCH, REFER TO "SERVICE PRECAUTION" LABEL ON EL. COMPO. BOX COVER. DS1, DS2 C63, C66 C1 R95 R1T OFF ON 1234 DS2 R5T t° X30A PRESSURE SENSOR (HIGH) MAGNETIC RELAY (A9P) THERMISTOR (HEAT EX, OF SUBCOOL INLET) THERMISTOR (HEAT EX, OF SUBCOOL OUTLET) THERMISTOR (HEAT EXC, DEICER) THERMISTOR (M1C DISCHARGE) THERMISTOR (SUCTION) THERMISTOR (FIN) (A3P) THERMISTOR (AIR) (A1P) RESISTOR (CURRENT LIMITING) RESISTOR (A3P) RESISTOR (CURRENT SENSOR) (A4P) PHASE REVERSAL DETECT CIRCUIT SWITCHING POWER SUPPLY (A1P, A3P) MOTOR (FAN) MOTOR (COMPRESSOR) REACTOR (A3P) Z1F R1T S4PH M Y2E M Y1E W X2A X1A OUTER SHELL M1C A2P A3P X1M S1S X3M A4P L1R A1P 3D059917C NOISE FILTER (WITH SURGE ABSORBER) (A2P) NOISE FILTER (FERRITE CORE) SOLENOID VALVE (4 WAY VALVE) ELECTRONIC EXPANSION VALVE (GAS) ELECTRONIC EXPANSION VALVE (MAIN) TERMINAL STRIP (REMOTE SWITCH) TERMINAL STRIP TERMINAL STRIP (OPERATION) (A5P) TERMINAL STRIP (POWER SUPPLY) CONNECTOR (M1F) DIODE BRIDGE (A3P) POWER MODULE (A3P, A4P) SAFETY DEVICES INPUT CURRENT SENSOR (A9P) PRESSURE SWITCH (HIGH) OPERATION SWITCH (REMOTE / OFF / ON) PRESSURE SWITCH (HIGH) (BACK) (FRONT) X2M A5P CONTROL, BOX CONTROL, BOX A9P M1F V LAYOUT OF M1C, M1F U TERMINAL OF M1C PRESSURE SENSOR (LOW) 5 WHT BLK 5 S1NPH S1NPL P< t° Z1C~5C, Z10C Y3S Y2E Y1E X3M X2M X1M X1M X1A, X2A V2R V1R V1CP T2A S4PH S1S S1PH S1NPL R6T t° BLK X21A X32A X31A X18A X36A X22A MAGNETIC RELAY (OPERATING OUTPUT) MAGNETIC RELAY (WARNING OUTPUT) MAGNETIC RELAY (Y3S) MAGNETIC RELAY (CAUTION OUTPUT) SWITCH NOTE)4 R3T R2T X29A COMPONENT LEAD WIER. R31T X3M 1 2 HAP CIRCUIT BOARD. IS CONNECTOR COLOR FOR COMPONENT. IS DISCRIMINATION COLOR FOR t° S1NPH RY1 R6T R5T R3T R31T R2T R1T 1234 DS1 t° R50, R59 R10 OFF ON BS1 BS2 BS3 BS4 BS5 H1P H2P H3P H4P H5P H6P H7P H8P IS CONNECTOR COLOR FOR PRINTED PS t° Q1RP PS M1F M1C PRINTED CIRCUIT BOARD (EARTH LEAKAGE DETECTOR) PUSH BUTTON SWITCH (MODE, SET, RETURN, TEST, RESET) A9P BS1~5 6. BE NOTED THAT THE CAPACITY OF CONTACT IS AC220~240V, 0.5A. (OPERATING OUTPUT) 9. COLORS BLK: BLACK RED: RED BLU: BLUE WHT: WHITE GRN: GREEN. K6R L1R PRINTED CIRCUIT BOARD (ABC I / P) K10R PRINTED CIRCUIT BOARD (FAN) A5P FUSE (8A, DC650V) (A4P) 8. WHEN OPERATING, DON'T SHORTCIRCUIT THE PROTECTION DEVICE (S1PH). 1 K3R 2 ON A4P FUSE (T, 3.15A, 250V) (A1P) 5. BE NOTED THAT THE CAPACITY OF CONTACT IS AC220~240V, 0.5A. (TOTAL OF CAUTION OUTPUT, WARNING OUTPUT) OFF PRINTED CIRCUIT BOARD (INV) 3 REMOTE 4 S1S C A3P B X2M PRINTED CIRCUIT BOARD (MAIN) A FUSE (T, 1.0A, 250V) (FOR THE REMOTE SWITCH, USE NON-VOLTAGE CONTACT FOR MICROCURRENT (NOT MORE THAN 1mA DC12V)) THE POINT OF CONTACT OF THE INPUT MUST USE THE ONE FOR A SLIGHT CURRENT. P1 P2 PRINTED CIRCUIT BOARD (NOISE FILTER) K5R X1M C1 W1 F4U X14A A2P X1A A5P C X10A CAUTION WARNING OPERATING OUTPUT OUTPUT OUTPUT NOTE)5 NOTE)5 NOTE)6 F3U Y3S X9A K10R A1P X66A X7A K3R F3U, F4U X4A X3A X2A K5R F1U, F2U V1CP S1PH P< Q1RP K6R F1U 4. AT THE TIME OF FACTORY SHIPMENT, SETTING OF "OFF". WHEN OPERATING, SETTING OF "ON" OR "REMOTE". : FIELD WIRING. 2. ONLY TO THE OUTDOOR UNIT. NOTES) 1. THIS WIRING DIAGRAM IS APPLIED X1M RED RED BLU RED Z1C N=1 WHT WHT BLU POWER SUPPLY BLK BLK BLK Y1: 380-415V 3N~50Hz RED Air Cooled Refrigeration Condensing Unit WHT 2.4 BLK L1 L2 L3 N SiENBE28-901 Standard Specification Wiring Diagram LRLEQ5A, 6AY1(E) LRMEQ5A, 6AY1(E) 15 X3A Z7C N=5 U M2C M 3~ V W U T W S V R K2M BLK A6P T1A X1A : TERMINAL STRIP 3. M1C MS 3~ W V U R50 R59 C66 C63 : CONNECTOR Z3C N=5 WHT P2 GRN C1 X403A t° RED BLK X1A Z5C N=1 X1A X3A X5A A4P Z4C N=1 X4A X6A X61A X402A F1U P1 Z2C N=1 BLK BLU RED MS 3~ M1F 5 5 F2U F1U X2A X4A X2A V1R R10 N1 X20A X28A X26A X1A A1P : PROTECTIVE EARTH (SCREW) X111A X41A X5A P3 N3 X1A PS R1T : TERMINAL X11A V1R R95 K1R V2R K2M X10A X401A K3R F400U Z1F GRN A2 K2M A B 3 REMOTE 4 S1S C 1234 DS2 R3T t° R5T t° Q1RP PS PHASE REVERSAL DETECT CIRCUIT SWITCHING POWER SUPPLY (A1P, A3P) MAGNETIC CONTACTOR (M2C) K2M S1NPH RY1 R6T R5T Z1C~7C, Z10C MAGNETIC RELAY THERMSITOR (HEAT EX, OF SUBCOOL OUTLET) PILOTLAMP (SERVICE MONITOR-GREEN) R3T MAGNETIC CONTACTOR (M1C) Y3S THERMSITOR (HEAT EXC, DEICER) R31T, R32T [H2]MALFUNCTION DETECTION---LIGHT UP Y3E Y2S PRESSURE SENSOR (HIGH) MAGNETIC RELAY (A9P) THERMSITOR (HEAT EX, OF SUBCOOL INLET) Z1F THERMSITOR (SUCTION) Y2E THERMSITOR (M1C, M2C DISCHARGE) R2T PILOTLAMP (SERVICE MONITOR-ORANGE) THERMSITOR (FIN) (A3P) R1T FUSE (T, 6.3A, 250V) (A2P) Y1E X3M X2M X1M X1M X1A, X2A H1P~8P THERMSITOR (AIR) (A1P) RESISTOR (CURRENT LIMITING) RESISTOR (A3P) RESISTOR (CURRENT SENSOR) (A4P, A5P) F400U R1T R95 R50, R59 R10 V W M Y3E M Y2E M Y1E X2A CONTROL, BOX A2P A3P A6P A4P L1R X3M 3D059918C NOISE FILTER (WITH SURGE ABSORBER) (A2P) NOISE FILTER (FERRITE CORE) SOLENOID VALVE (4 WAY VALVE) SOLENOID VALVE (M2C) ELECTRONIC EXPANSION VALVE (M1C) ELECTRONIC EXPANSION VALVE (GAS) ELECTRONIC EXPANSION VALVE (MAIN) TERMINAL STRIP (REMOTE SWITCH) TERMINAL STRIP TERMINAL STRIP (OPERATION) (A5P) TERMINAL STRIP (POWER SUPPLY) CONNECTOR (M1F) DIODE BRIDGE (A3P) POWER MODULE (A3P, A4P) SAFETY DEVICES INPUT CURRENT SENSOR (A9P) CURRENT SENSOR (A6P) PRESSURE SWITCH (HIGH) OPERATION SWITCH (REMOTE/OFF/ON) PRESSURE SWITCH (HIGH) A1P K2M (BACK) (FRONT) X1M X2M S1S A5P OUTER SHELL M2C M1C CONTROL. BOX A9P X1A M1F LAYOUT OF M1C, M2C, M1F U TERMINAL OF M1C, M2C PRESSURE SENSOR (LOW) 5 WHT BLU 5 WHT BLK 5 S1NPH FUSE (T, 1.0A, 250V) FUSE (T, 3.15A, 250V) (A1P) FUSE (8A, DC650V) (A4P) DIP SWITCH (A1P) CAPACITOR (A3P) CAPACITOR V2R V1R V1CP T2A T1A S4PH S1S R1T S4PH S1NPL S1PH, S2PH S1NPL t° P< F3U, F4U F1U, F2U F1U DS1, DS2 C63, C66 C1 MOTOR (FAN) M1C, M2C M1F REACTOR (A3P) L1R MAGNETIC RELAY (OPERATING OUTPUT) MOTOR (COMPRESSOR) K10R (MODE, SET, RETURN, TEST, RESET) R6T t° X23A BLU BLK X21A X32A X31A X18A X22A MAGNETIC RELAY (WARNING OUTPUT) MAGNETIC RELAY (Y3S) MAGNETIC RELAY (Y2S) MAGNETIC RELAY (CAUTION OUTPUT) MAGNETIC RELAY (K2M) SWITCH NOTE)4 R2T t° X30A PUSH BUTTON SWITCH BS1~5 HAP IS CONNECTOR COLOR FOR COMPONENT. IS DISCRIMINATION COLOR FOR COMPONENT LEAD WIRE. PRINTED CIRCUIT BOARD (EARTH LEAKAGE DETECTOR) HAP 9. COLORS BLK:BLACK RED:RED BLU:BLUE WHT:WHITE CRN:GREEN. OFF ON IS CONNECTOR COLOR FOR PRINTED CIRCUIT 1234 DS1 BS1 BS2 BS3 BS4 BS5 X36A H1P H2P H3P H4P H5P H6P H7P H8P PRINTED CIRCUIT BOARD (CURRENT SENSOR) K6R K5R K4R K3R K1R X3M 1 2 R32T t° X29A ON OFF PS A9P PRINTED CIRCUIT BOARD (ABC I/P) PRINTED CIRCUIT BOARD (FAN) PRINTED CIRCUIT BOARD (INV) PRINTED CIRCUIT BOARD (NOISE FILTER) 2 t° R31T ON 1 X2M OFF PRINTED CIRCUIT BOARD (MAIN) X1M OPERATING OUTPUT NOTE)6 P1 P2 F4U X14A K10R A6P A5P A4P A3P A2P A1P X1A C1 W1 X10A CAUTION WARNING OUTPUT OUTPUT NOTE)5 NOTE)5 C F3U Y3S X9A K2M, K4M X66A A5P Y2S X8A K4R K1R, K3R X5A K1R K3R X7A K5R REFER TO TECHNICAL GUIDE FOR THE OPERATION TIMING DIAGRAM. WHT RED X4A X3A X2A K6R 10. RY1 POINT CONTACT IS OPEN BEFORE TURNING ON POWER SUPPLY. 8. WHEN OPERATING, DON'T SHORTCIRCUIT THE PROTECTION DEVICE (S1PH, S2PH). 7. HOW TO USE BS1~5 AND DS1 AND DS2 SWITCH, REFER TO "SERVICE PRECAUTION" LABEL ON EL. COMPO. BOX COVER. 6. BE NOTED THAT THE CAPACITY OF CONTACT IS AC220~240V, 0.5A. (OPERATING OUTPUT) P< P< Q1RP V1CP S2PH S1PH A1 5. BE NOTED THAT THE CAPACITY OF CONTACT IS AC220~240V, 0.5A. (TOTAL OF CAUTION OUTPUT, WARNING OUTPUT) NON-VOLTAGE CONTACT FOR MICROCURRENT (NOT MORE THAN 1mA DC12V)) POINT OF CONTACT OF THE INPUT MUST USE THE ONE FOR A SLIGHT CURRENT. (FOR THE REMOTE SWITCH, USE 4. AT THE TIME OF FACTORY SHIPMENT, SETTING OF "OFF". WHEN OPERATING, SETTING OF "ON" OR "REMOTE". THE : FIELD WIRING. 2. TO THE OUTDOOR UNIT. WHT P1 A3P K4M T2A N=1 Z1C N=1 X400A L1R A2P Z6C N=1 1. THIS WIRING DIAGRAM IS APPLIED ONLY NOTES) NOTE) 10 X2A RY1 X1A N BLU N A9P L3 L3 Z10C N=4 WHT WHT L2 RED L2 RED BLU POWER SUPPLY Y1: 380-415V 3N~50Hz BLK RED WHT RED WHT BLK BLK WHT BLK RED RED L1 BLK X1M WHT 16 L1 Standard Specification SiENBE28-901 LRLEQ8A, 10A, 12AY1(E) LRMEQ8A, 10A, 12AY1(E) Air Cooled Refrigeration Condensing Unit W : TERMINAL STRIP TO THE OUTDOOR UNIT. : FIELD WIRING. P1 A3P : CONNECTOR M1C MS 3~ W V R50 R59 C66 C63 U WHT P2 L1R K4M X400A Z1C N=1 K3R Z3C N=5 P3 N3 t° X111A X41A X5A PS X1A X403A BLU :TERMINAL X11A V1R R95 K1R V2R K2M X10A X401A WHT R1T GRN F400U Z1F C1 BLK RED F1U P2 N1 Z2C N=1 M1F MS 3~ N2 X2A X3A 5 5 X20A X28A X25A X26A X2A X4A X51A RED WHT F1U A5P 4 3 REMOTE S1S OFF C 2 PUSH BUTTON SWITCH CAPACITOR (A3P) R6T t° MAGNETIC RELAY (Y2S) RESISTOR (CURRENT LIMITING) RESISTOR (A3P) THERMISTOR (M1C~3C DISCHARGE) THERMISTOR (HEAT EXC, DEICER) R2T R31~33T R3T [H2P] MALFUNCTION DETECTION---LIGHT UP MAGNETIC CONTACTOR (M1C) MAGNETIC CONTACTOR (M2C, M3C) MAGNETIC RELAY (K2M, K3M) K2M, K3M K1R, K2R S1NPL S1NPH RY1 R6T PILOTLAMP (SERVICE MONITOR-GREEN) R5T MAGNETIC RELAY K2M, K4M PRESSURE SENSOR (LOW) PRESSURE SENSOR (HIGH) MAGNETIC RELAY (A9P) R1T Y5S Y3S Y2S Y3E Y2E Y1E X3M X2M X1M X1M X105A X1A~4A V2R V1R V1CP T2A T1A S1S S4PH Z1F 5 V W M2F A2P A3P X1M X2A X4A X1A X3A A9P (BACK) X3M A5P 3D063035B NOISE FILTER (WITH SURGE ABSORBER) (A2P) NOISE FILTER (FERRITE CORE) SOLENOID VALVE (M3C) SOLENOID VALVE (4 WAY VALVE) SOLENOID VALVE (M2C) ELECTRONIC EXPANSION VALVE (M1C) ELECTRONIC EXPANSION VALVE (GAS) ELECTRONIC EXPANSION VALVE (MAIN) TERMINAL STRIP (REMOTE SWITCH) TERMINAL STRIP TERMINAL STRIP (OPERATION) (A5P) TERMINAL STRIP (POWER SUPPLY) CONNECTOR (S3PH) CONNECTOR (M1F, M2F) DIODE BRIDGE (A3P) POWER MODULE (A3P, A4P, A8P) SAFETY DEVICES INPUT CURRENT SENSOR (A9P) CURRENT SENSOR (A6P, A7P) OPERATION SWITCH (REMOTE/OFF/ON) PRESSURE SWITCH (HIGH) A8P A4P L1R K3M A7P A1P (FRONT) K2M A6P X2M S1S CONTROL. BOX OUTER SHELL M3C M2C M1C CONTROL, BOX PRESSURE SWITCH (HIGH) M Y3E M Y2E M M1F LAYOUT OF M1C~M3C, M1F, M2F U TERMINAL OF M1C~M3C Y1E WHT BLU 5 WHT BLK 5 S1NPH S1NPL THERMISTOR (HEAT EX, OF SUBCOOL INLET) Z1C~10C THERMISTOR (HEAT EX, OF SUBCOOL OUTLET) THERMISTOR (SUCTION) THERMISTOR (FIN) (A3P) PILOTLAMP (SERVICE MONITOR-ORANGE) R1T H1P~8P THERMISTOR (AIR) (A1P) t° P< S4PH S1PH~3PH BLU RESISTOR (CURRENT SENSOR) (A4P, A8P) PHASE REVERSAL DETECT CIRCUIT SWITCHING POWER SUPPLY (A1P, A3P) MOTOR (FAN) MOTOR (COMPRESSOR) REACTOR (A3P) MAGNETIC RELAY (Y5S) MAGNETIC RELAY (OPERATING OUTPUT) MAGNETIC RELAY (WARNING OUTPUT) MAGNETIC RELAY (Y3S) FUSE (T, 6.3A, 250V) (A2P) K1R,K3R 9. COLORS BLK:BLACK RED:RED BLU:BLUE WHT:WHITE GRN:GREEN. R5T t° X23A MAGNETIC RELAY (CAUTION OUTPUT) SWITCH R3T t° X30A BLK X21A X32A X31A X18A X22A F400U R1T R95 R50, R59 R10 Q1RP PS M1F, M2F M1C~3C L1R K11R K10R K6R 1234 DS2 FUSE (T, 1.0A, 250V) FUSE (T, 3.15A, 250V) (A1P) FUSE (8A, DC650V) (A4P, A8P) DIP SWITCH (A1P) K4R K5R OFF ON F3U, F4U F1U, F2U F1U DS1, DS2 C63, C66 CAPACITOR (MODE, SET, RETURN, TEST, RESET) PRINTED CIRCUIT BOARD (EARTH LEAKAGE DETECTOR) C1 PRINTED CIRCUIT BOARD (CURRENT SENSOR) A6P, A7P BS1~5 A5P A9P PRINTED CIRCUIT BOARD (FAN) PRINTED CIRCUIT BOARD (ABC I/P) A4P, A8P PRINTED CIRCUIT BOARD (NOISE FILTER) K3R R2T R33T R32T R31T NOTE)4 t° t° X3M 1 2 1234 DS1 IS CONNECTOR COLOR FOR COMPONENT. IS DISCRIMINATION COLOR FOR COMPONENT LEAD WIRE. t° ON 1 PRINTED CIRCUIT BOARD (MAIN) B X29A OFF ON HAP X36A H5P H6P H7P H8P BS1 BS2 BS3 BS4 BS5 H1P H2P H3P H4P IS CONNECTOR COLOR FOR PRINTED CIRCUIT BOARD. PS t° P1 P2 X2M PRINTED CIRCUIT BOARD (INV) A X1M C1 W1 Y5S X15A X14A A3P A2P A1P X1A C F4U CAUTION WARNING OPERATING OUTPUT OUTPUT OUTPUT NOTE)5 NOTE)5 NOTE)6 F3U Y3S X10A X9A HAP 5 WHT X4A RED X4A X6A X66A Y2S X8A X7A REFER TO TECHNICAL GUIDE FOR THE OPERATION TIMING DIAGRAM. M2F MS 3~ 5 X4A X3A X2A K2R X5A K1R X2A V1R R10 N1 RED WHT WHT RED V1CP X105A P< P< Q1RP 10. RY1 POINT CONTACT IS OPEN BEFORE TURNING ON POWER SUPPLY. 8. WHEN OPERATING, DON'T SHORTCIRCUIT THE PROTECTION DEVICE (S1PH~S3PH). 7. HOW TO USE BS1~5, DS1 AND DS2 SWITCH, REFER TO "SERVICE PRECAUTION" LABEL ON EL. COMPO. BOX COVER. 6. BE NOTED THAT THE CAPACITY OF CONTACT IS AC220~240V, 0.5A. (OPERATING OUTPUT) 5. BE NOTED THAT THE CAPACITY OF CONTACT IS AC220~240V, 0.5A. (TOTAL OF CAUTION OUTPUT, WARNING OUTPUT) (FOR THE REMOTE SWITCH, USE NON-VOLTAGE CONTACT FOR MICROCURRENT (NOT MORE THAN 1mA DC12V)) THE POINT OF CONTACT OF THE INPUT MUST USE THE ONE FOR A SLIGHT CURRENT. RED X3A Z9C N=1 X1A X3A P1 A2 K3M A1 A2 K2M A1 P< S2PH S1PH F2U F1U S3PH X5A A8P X1A A1P BLK RED X2A V1R R10 RY1 NOTE) 10 X1A A9P BLK BLU RED :PROTECTIVE EARTH (SCREW) X1A Z5C N=1 X1A X3A X5A P1 A4P Z4C N=1 X4A X6A X61A X402A BLK 4. AT THE TIME OF FACTORY SHIPMENT, SETTING OF "OFF". WHEN OPERATING, SETTING OF "ON" OR "REMOTE". 3. 2. A2P WHT 1. THIS WIRING DIAGRAM IS APPLIED ONLY M3C V M2C U M 3~ W M 3~ V U Z7C N=5 Z8C N=5 W V K3M U W T V S R T1A A7P T1A X1A Z6C N=1 T2A N=1 BLU BLK A6P X1A N L3 L2 T S K2M U R NOTES) N L3 RED L2 WHT BLK WHT K3R L1 RED K4R L1 WHT RED RED BLK RED BLK WHT BLK WHT GRN RED Z10C N=4 BLK K5R RED WHT K6R X1M RED K10R POWER SUPPLY BLK Air Cooled Refrigeration Condensing Unit WHT K11R Y1: 380-415V 3N~50Hz SiENBE28-901 Standard Specification LRLEQ15A, 20AY1(E) LRMEQ15A, 20AY1(E) 17 Standard Specification 2.5 SiENBE28-901 Piping Diagram LRLEQ5A, 6AY1(E) LRMEQ5A, 6AY1(E) FILTER CHECK VALVE RECEIVER DOUBLE PIPE HEAT EXCHANGER SERVICE PORT CHECK VALVE ELECTRONIC EXPANSION VALVE FUSIBLE PLUG CHECK VALVE PRESSURE REGULATING VALVE FILTER SIGHT GLASS ELECTRONIC EXPANSION VALVE FILTER M HPS STOP VALVE FAN HEAT EXCHANGER STOP VALVE SERVICE PORT FOUR WAY VALVE GAUGE PORT HIGH PRESSURE SWITCH (DEFROST) HIGH PRESSURE SENSOR SENPH CAPILLARY TUBE FILTER OIL SEPARATOR GAUGE PORT LIQUID PIPE φ9.5 C1220T SERVICE PORT CHECK VALVE HIGH PRESSURE HPS SWITCH LOW PRESSURE SENSOR SENPL COMPRESSOR INV GAS PIPE φ19.1 C1220T STOP VALVE (WITH SERVICE PORT φ7.9mm FLARE CONNECTION) 3D064606A 18 Air Cooled Refrigeration Condensing Unit SiENBE28-901 Standard Specification LRLEQ8A, 10A, 12AY1(E) LRMEQ8A, 10A, 12AY1(E) CHECK VALVE RECEIVER FILTER ELECTRONIC EXPANSION VALVE SERVICE PORT PLATE TYPE HEAT EXCHANGER CHECK VALVE FUSIBLE PLUG CHECK VALVE PRESSURE REGULATING VALVE FILTER SIGHT GLASS ELECTRONIC EXPANSION VALVE FAN S4PH FOUR WAY VALVE STOP VALVE HIGH PRESSURE SWITCH (DEFROST) FILTER HEAT EXCHANGER M STOP VALVE SERVICE PORT GAUGE PORT HIGH PRESSURE SENSOR S1NPH CHECK VALVE CHECK VALVE LOW PRESSURE SENSOR HIGH PRESSURE S1PH SWITCH CHECK VALVE FILTER CAPILLARY TUBE HIGH PRESSURE SWITCH S2PH OIL SEPARATOR CAPILLARYFILTER TUBE OIL SEPARATOR GAUGE PORT LIQUID PIPE φ9.5 C1220T SERVICE PORT FILTER SV ELECTRONIC EXPANSION VALVE COMPRESSOR INV COMPRESSOR SOLENOID CHECK STD VALVE VALVE S1NPL GAS PIPE φ25.4 C1220T STOP VALVE (WITH SERVICE PORT φ7.9mm FLARE CONNECTION) 3D064605 Air Cooled Refrigeration Condensing Unit 19 Standard Specification SiENBE28-901 LRLEQ15A, 20AY1(E) LRMEQ15A, 20AY1(E) CHECK VALVE RECEIVER FILTER ELECTRONIC EXPANSION VALVE SERVICE PORT PLATE TYPE HEAT EXCHANGER CHECK VALVE FUSIBLE PLUG CHECK VALVE PRESSURE REGULATING VALVE FILTER SIGHT GLASS FAN ELECTRONIC EXPANSION VALVE S4PH FOUR WAY VALVE STOP VALVE HIGH PRESSURE SWITCH (DEFROST) FILTER HEAT EXCHANGER M STOP VALVE SERVICE PORT GAUGE PORT HIGH PRESSURE SENSOR S1NPH CHECK VALVE CHECK VALVE CHECK VALVE CHECK VALVE FILTER CHECK VALVE FILTER LOW PRESSURE SENSOR S1NPL HIGH PRESSURE S1PH SWITCH CAPILLARY TUBE HIGH PRESSURE SWITCH S3PH SV ELECTRONIC EXPANSION VALVE SV COMPRESSOR COMPRESSOR SOLENOID CHECK STD1 INV VALVE OIL SEPARATOR CAPILLARY TUBE HIGH PRESSURE SWITCH S2PH OIL SEPARATOR CAPILLARYFILTER TUBE OIL SEPARATOR GAUGE PORT LIQUID PIPE φ12.7 C1220T SERVICE PORT FILTER VALVE COMPRESSOR SOLENOID CHECK STD2 VALVE VALVE GAS PIPE φ31.8 C1220T STOP VALVE (WITH SERVICE PORT φ7.9mm FLARE CONNECTION) 3D064603 20 Air Cooled Refrigeration Condensing Unit SiENBE28-901 2.6 Standard Specification Description and Layout of Functional Parts and Piping Diagram LRMEQ5, 6AY1 LRLEQ5, 6AY1 No. Name Symbol 1 Inverter compressor (INV) M1C 2 M1F Y1E Not used. Y2E 5 6 7 Fan motor Electronic expansion valve (Main: EV1) Electronic expansion valve (Injection: EV2) Four way valve High pressure sensor Low pressure sensor Function An inverter-driven compressor, which runs at operating frequencies in the range of 52Hz to 218Hz. Used to operate a fan for heat exchange through an air heat exchanger. 8 High pressure switch S1PH 9 High pressure switch S4PH 10 Fusible plug — 11 Pressure regulating valve — Used to control the injection flow rate and the compressor overheat protection. Not used. Used to detect high pressure. Used to detect low pressure. In order to prevent the increase of high pressure when a malfunction occurs, this switch activated at high pressure of 3.8MPa or more to stop the compressor operation. Not used. When the refrigerant of the receiver unit reaches a temperature of 70°C to 75°C, the fusible head of plug will melt, thus discharging the refrigerant of high temperature and high pressure. Opens when the pressure reaches 4.0 MPa. This prevents an excessive pressure rise caused by the pipes being completely filled with liquid when not in operation. 12 — Used to cool the liquid refrigerant from the liquid receiver. — Used to service. — Used to service. 15 16 17 Double pipe heat exchanger Stop valve (Heat exchanger on primary side) Stop valve (Double pipe heat exchanger on secondary side) Service port Service port Service port — — — 18 Oil separator — 19 Liquid receiver — 20 — D Sight glass Thermistor (Outdoor air: Ta) Thermistor (Suction pipe: Ti) Thermistor (INV discharge pipe: Td1) Thermistor (Heat exchanger deicer: Tce) For gas (high pressure). For liquid (high pressure). For gas (low pressure). Refrigerant gas discharged from the compressor contains lubricating oil in the compressor. If the amount of this lubricating oil is large, the oil quantity in the compressor will become short, which may result in defective lubrication. Furthermore, this oil stains the heat transfer surface of condenser or evaporator and reduces the effectiveness of the heat exchanger. To avoid that, an oil separator is installed in close proximity to the discharge pipe of the compressor, where oil is separated and collected to return to the compressor. Used to compensate the variations in handling of refrigerant, thus providing stable operating conditions at all times. In order to repair in the refrigerant circuit, this receiver collects the refrigerant and facilitates the repairing of the parts. Used to test run and service. E Thermistor (Double pipe heat exchanger outlet: Tg) R5T F Thermistor (Double pipe heat exchanger inlet: TL) R6T 3 4 13 14 A B C Y3S S1NPH S1NPL Air Cooled Refrigeration Condensing Unit R1T Used to detect the outdoor temperature and control the fan operation. R2T R31T Used to detect the suction pipe temperature of M1C compressor and protect this compressor. Used to detect the discharge pipe temperature of M1C compressor and control over discharge pipe temperature of this compressor for protection. R3T Not used. Used to detect the gas temperature at evaporator side of double pipe heat exchanger, and keep the constant overheated degree of double pipe heat exchanger. Used to detect the gas saturation temperature at evaporator side of double pipe heat exchanger. 21 Standard Specification SiENBE28-901 LRMEQ5, 6AY1 LRLEQ5, 6AY1 FILTER CHECK VALVE (F) (16) (E) SERVICE PORT (19) RECEIVER (12) DOUBLE PIPE HEAT EXCHANGER FUSIBLE(10) PLUG CHECK VALVE PRESSURE REGULATING VALVE (11) ELECTRONIC EXPANSION (4) VALVE FILTER (D) SIGHT GLASS (20) CHECK VALVE FAN ELECTRONIC EXPANSION (3) VALVE (2) HEAT EXCHANGER M S4PH (A) FILTER STOP VALVE FOUR WAY VALVE (13) (5) STOP VALVE (14) HIGH PRESSURE SWITCH (DEFROST) GAUGE PORT HIGH PRESSURE SENSOR (9) S1NPH (6) CHECK VALVE SERVICE PORT (17) GAUGE PORT SERVICE PORT CAPILLARY TUBE LIQUID PIPE φ9.5 C1220T FILTER OIL SEPARATOR (15) (18) HIGH PRESSURE (8) SWITCH S1PH (C) LOW PRESSURE SENSOR COMPRESSOR INV S1NPL (1) (7) GAS PIPE φ19.1 C1220T (B) STOP VALVE (WITH SERVICE PORT φ7.9mm FLARE CONNECTION) 22 Air Cooled Refrigeration Condensing Unit SiENBE28-901 Standard Specification LRMEQ5, 6AY1 LRLEQ5, 6AY1 19 10 18 C R31T 2 M1F 17 6 S1NPH 12 7 S1NPL Y3S 5 13 Y2E 4 Y1E 3 S4PH 9 14 15 16 B R2T 11 A R1T 20 R5T E F R6T 8 S1PH 1 M1C R3T D Air Cooled Refrigeration Condensing Unit 23 Standard Specification SiENBE28-901 LRMEQ8, 10, 12AY1 LRLEQ8, 10, 12AY1 No. Name Symbol 1 Inverter compressor (INV) M1C 2 3 M2C M1F Y1E Not used. 5 Standard compressor (STD) Fan motor Electronic expansion valve (Main: EV1) Electronic expansion valve (Injection: EV2) Function An inverter-driven compressor, which runs at operating frequencies in the range of 52Hz to 232Hz. A compressor, which runs with commercial power supply. Used to operate a fan for heat exchange through an air heat exchanger. Y2E 6 Electronic expansion valve (M1C: EV3) Y3E 7 8 9 10 13 Solenoid valve Four way valve High pressure sensor Low pressure sensor High pressure switch (for INV) High pressure switch (for STD) High pressure switch Used to control the injection flow rate and the compressor overheat protection. Returns the oil to the inverter compressor and creates a gas-injection economizer circuit. In addition, this controls the difference in discharge pipe temperatures between INV compressor and STD compressor. Returns the oil to the M2C and creates a gas-injection economizer circuit. Not used. Used to detect high pressure. Used to detect low pressure. 14 Fusible plug — 15 Pressure regulating valve — 16 — — Used to service. — Used to service. 19 20 21 Plate type heat exchanger Stop valve (Heat exchanger on primary side) Stop valve (Double pipe heat exchanger on secondary side) Service port Service port Service port Not used. When the refrigerant of the receiver unit reaches a temperature of 70°C to 75°C, the fusible head of plug will melt, thus discharging the refrigerant of high temperature and high pressure. Opens when the pressure reaches 4.0 MPa. This prevents an excessive pressure rise caused by the pipes being completely filled with liquid when not in operation. Used to cool the liquid refrigerant from the liquid receiver. — — — 22 Oil separator — 23 Liquid receiver — 24 Sight glass Thermistor (Outdoor air: Ta) Thermistor (Suction pipe: Ti) Thermistor (INV discharge pipe: Td1) Thermistor (STD discharge pipe: Td2) Thermistor (Heat exchanger deicer: Tce) Thermistor (Plate type heat exchanger outlet: Tg) Thermistor (Plate type heat exchanger inlet: TL) — For gas (high pressure). For liquid (high pressure). For gas (low pressure). Refrigerant gas discharged from the compressor contains lubricating oil in the compressor. If the amount of this lubricating oil is large, the oil quantity in the compressor will become short, which may result in defective lubrication. Furthermore, this oil stains the heat transfer surface of condenser or evaporator and reduces the effectiveness of the heat exchanger. To avoid that, an oil separator is installed in close proximity to the discharge pipe of the compressor, where oil is separated and collected to return to the compressor. Used to compensate the variations in handling of refrigerant, thus providing stable operating conditions at all times. In order to repair in the refrigerant circuit, this receiver collects the refrigerant and facilitates the repairing of the parts. Used to test run and service. 4 11 12 17 18 A B C D E F G 24 Y2S Y3S S1NPH S1NPL S1PH S2PH S4PH In order to prevent the increase of high pressure when a malfunction occurs, this switch activated at high pressure of 3.8MPa or more to stop the compressor operation. R1T Used to detect the outdoor temperature and control the fan operation. R2T R32T Used to detect the suction pipe temperature of M1C and M2C compressor and protect this compressor. Used to detect the discharge pipe temperature of M1C compressor and control over discharge pipe temperature of this compressor for protection. Used to detect the discharge pipe temperature of M2C compressor and control over discharge pipe temperature of this compressor for protection. R3T Not used. R31T R5T R6T Used to detect the gas temperature at evaporator side of double pipe heat exchanger, and keep the constant overheated degree of double pipe heat exchanger. Used to detect the gas saturation temperature at evaporator side of double pipe heat exchanger. Air Cooled Refrigeration Condensing Unit SiENBE28-901 Standard Specification LRMEQ8, 10, 12AY1 LRLEQ8, 10, 12AY1 CHECK VALVE (14) (G) (23) ELECTRONIC EXPANSION (5) VALVE (20) SERVICE PORT (F) PLATE TYPE HEAT(16) EXCHANGER RECEIVER FILTER FUSIBLE PLUG (15) CHECK VALVE PRESSURE REGULATING VALVE (E) FILTER SIGHT GLASS (24) CHECK VALVE (3) FAN ELECTRONIC EXPANSION (4) VALVE HEAT EXCHANGER M (A) S4PH (17) FILTER STOP VALVE FOUR WAY VALVE STOP VALVE (18) HIGH PRESSURE SWITCH (DEFROST) (13) (8) SERVICE PORT (19) GAUGE PORT HIGH PRESSURE SENSOR (9) S1NPH CHECK VALVE CHECK VALVE LOW PRESSURE SENSOR CAPILLARYFILTER TUBE HIGH PRESSURE (11) SWITCH (22) CAPILLARY TUBE HIGH PRESSURE (12) SWITCH S2PH S1PH (C) ELECTRONIC EXPANSION (6) VALVE CHECK VALVE FILTER COMPRESSOR INV (1) S1NPL OIL SEPARATOR GAUGE PORT LIQUID PIPE φ9.5 C1220T SERVICE PORT (21) OIL SEPARATOR FILTER (22) (D) SV COMPRESSOR SOLENOID CHECK STD VALVE (7) VALVE (2) (10) (B) GAS PIPE φ25.4 C1220T STOP VALVE (WITH SERVICE PORT φ7.9mm FLARE CONNECTION) Air Cooled Refrigeration Condensing Unit 25 Standard Specification SiENBE28-901 LRMEQ8, 10, 12AY1 LRLEQ8, 10, 12AY1 Y3E Y2S 23 14 22 6 7 16 D R32T C R31T 3 M1F 9 S1NPH 19 17 S4PH 13 21 10 S1NPL Y3S 8 B R2T Y1E 4 Y2E 5 11 S1PH 12 S2PH 20 15 18 24 R6T G A R1T 1 M1C 2 M2C R3T E R5T F 26 Air Cooled Refrigeration Condensing Unit SiENBE28-901 Standard Specification LRMEQ15, 20AY1 LRLEQ15, 20AY1 No. Name Symbol 1 Inverter compressor (INV) M1C 2 3 4 5 M2C M3C M1F M2F 7 Standard compressor (STD 1) Standard compressor (STD 2) Fan motor Fan motor Electronic expansion valve (Main: EV1) Electronic expansion valve (Injection: EV2) 8 Electronic expansion valve (M1C: EV3) Y3E 9 10 11 12 13 14 15 16 17 Solenoid valve Four way valve Solenoid valve High pressure sensor Low pressure sensor High pressure switch (for INV) High pressure switch (for STD 1) High pressure switch (for STD 2) High pressure switch Y2S Y3S Y5S S1NPH S1NPL S1PH S2PH S3PH S4PH 18 Fusible plug — 19 Pressure regulating valve — 20 — — Used to service. — Used to service. 23 24 25 Plate type heat exchanger Stop valve (Heat exchanger on primary side) Stop valve (Double pipe heat exchanger on secondary side) Service port Service port Service port Not used. When the refrigerant of the receiver unit reaches a temperature of 70°C to 75°C, the fusible head of plug will melt, thus discharging the refrigerant of high temperature and high pressure. Opens when the pressure reaches 4.0 MPa. This prevents an excessive pressure rise caused by the pipes being completely filled with liquid when not in operation. Used to cool the liquid refrigerant from the liquid receiver. — — — 26 Oil separator — 27 Liquid receiver — 28 A Sight glass Thermistor (Outdoor air: Ta) — R1T B Thermistor (Suction pipe: Ti) R2T C Thermistor (INV discharge pipe: Td1) Thermistor (STD 1 discharge pipe: Td2) Thermistor (STD 2 discharge pipe: Td3) Thermistor (Heat exchanger deicer: Tce) Thermistor (Plate type heat exchanger outlet: Tg) Thermistor (Plate type heat exchanger inlet: TL) R31T R33T For gas (high pressure). For liquid (high pressure). For gas (low pressure). Refrigerant gas discharged from the compressor contains lubricating oil in the compressor. If the amount of this lubricating oil is large, the oil quantity in the compressor will become short, which may result in defective lubrication. Furthermore, this oil stains the heat transfer surface of condenser or evaporator and reduces the effectiveness of the heat exchanger. To avoid that, an oil separator is installed in close proximity to the discharge pipe of the compressor, where oil is separated and collected to return to the compressor. Used to compensate the variations in handling of refrigerant, thus providing stable operating conditions at all times. In order to repair in the refrigerant circuit, this receiver collects the refrigerant and facilitates the repairing of the parts. Used to test run and service. Used to detect the outdoor temperature and control the fan operation. Used to detect the suction pipe temperature of M1C~M3C compressor and protect this compressor. Used to detect the discharge pipe temperature of M1C compressor and control over discharge pipe temperature of this compressor for protection. Used to detect the discharge pipe temperature of M2C compressor and control over discharge pipe temperature of this compressor for protection. Used to detect the discharge pipe temperature of M3C compressor and control over discharge pipe temperature of this compressor for protection. R3T Not used. 6 21 22 D E F G H Air Cooled Refrigeration Condensing Unit Function An inverter-driven compressor, which runs at operating frequencies in the range of 52Hz to 232Hz. A compressor, which runs with commercial power supply. Used to operate a fan on the right for heat exchange through an air heat exchanger. Used to operate a fan on the left for heat exchange through an air heat exchanger. Y1E Not used. Y2E Used to control the injection flow rate and the compressor overheat protection. Returns the oil to the inverter compressor and creates a gas-injection economizer circuit. In addition, this controls the difference in discharge pipe temperatures between INV compressor and STD compressor. Returns the oil to the M2C and creates a gas-injection economizer circuit. Not used. Returns the oil to the M3C and creates a gas-injection economizer circuit. Used to detect high pressure. Used to detect low pressure. R32T R5T R6T In order to prevent the increase of high pressure when a malfunction occurs, this switch activated at high pressure of 3.8MPa or more to stop the compressor operation. Used to detect the gas temperature at evaporator side of double pipe heat exchanger, and keep the constant overheated degree of double pipe heat exchanger. Used to detect the gas saturation temperature at evaporator side of double pipe heat exchanger. 27 Standard Specification SiENBE28-901 LRMEQ15, 20AY1 LRLEQ15, 20AY1 CHECK VALVE (H) (27) ELECTRONIC EXPANSION (7) VALVE (24) SERVICE PORT (G) RECEIVER FILTER FUSIBLE PLUG (18) CHECK VALVE PRESSURE REGULATING VALVE (19) PLATE TYPE HEAT (20) EXCHANGER FILTER (F) SIGHT GLASS (28) CHECK VALVE FAN ELECTRONIC EXPANSION (6) VALVE (4) (5) HEAT EXCHANGER M (21) S4PH (10) GAUGE PORT HIGH PRESSURE SENSOR (17) CHECK VALVE CHECK VALVE FILTER CAPILLARY TUBE HIGH PRESSURE (15) SWITCH S2PH (C) ELECTRONIC EXPANSION (8) VALVE SV (26) OIL SEPARATOR PRESSURE (14) HIGH SWITCH S1PH (26) OIL SEPARATOR GAUGE PORT LOW PRESSURE SENSOR SERVICE PORT LIQUID PIPE φ12.7 C1220T CAPILLARY FILTER TUBE CHECK VALVE CHECK VALVE FILTER (25) (12) S1NPH CHECK VALVE FILTER CAPILLARY TUBE HIGH PRESSURE (16) SWITCH S3PH (D) COMPRESSOR COMPRESSOR INV (1) SOLENOID CHECK STD1 S1NPL VALVE (9) VALVE (2) SV (26) OIL SEPARATOR FILTER (A) STOP VALVE SERVICE PORT (23) FOUR WAY VALVE STOP VALVE (22) HIGH PRESSURE SWITCH (DEFROST) (E) COMPRESSOR SOLENOID CHECK STD2 VALVE VALVE (3) (11) (13) GAS PIPE φ31.8 C1220T (B) STOP VALVE (WITH SERVICE PORT φ7.9mm FLARE CONNECTION) 28 Air Cooled Refrigeration Condensing Unit SiENBE28-901 Standard Specification LRMEQ15, 20AY1 LRLEQ15, 20AY1 20 27 18 26 Y3E Y2S Y5S 9 11 8 E R33T S1PH 14 D R32T C R31T 5 23 25 Y3S 10 21 S4PH 17 Y2E 7 19 24 Y1E 6 28 22 R3T F R6T H 4 13 S1NPL 12 S1NPH B R2T 16 S3PH 15 S2PH A R1T 1 M1C 2 M2C 3 M3C R5T G Air Cooled Refrigeration Condensing Unit 29 Field Settings SiENBE28-901 3. Field Settings 3.1 Field Setting From Outdoor Unit The target evaporation temperature can be calculated as follows: Tst : Target evaporation temperature Tsd : Evaporation temperature set by dip switches ΔTsp : Temperature correction setting by pushbuttons. ΔTsn : Temperature correction setting during night-time operation Tst = Tsd + ΔTsp + ΔTsn The evaporation temperature can be set by dip switches and pushbuttons on the outdoor unit PCB. The dip switches can be set when the power is turned off, while the pushbuttons can be set while the condensing unit is operating. Note that the actual evaporation temperature may be lower than that specified, if the outdoor temperature is too low. (This is intended to protect the compressors.) Do not set the evaporation temperature to less than the values below. (This may damage the compressors.) MT series : -20°C LT series : -45°C (1) Field settings by dip switches Be sure to turn off the power before changing the DIP switch settings. DS1-1 to 3 enable setting the saturated temperature equivalent to suction pressure (in increments of 5°C). Do not change the settings of DS1-4, DS2-1 to 4. Switch box Location of soft switches Location of dip switches DS1 DS2 1 2 3 4 5 6 7 8 ON Main PCB OFF Dip switches 1 to 3 The evaporation temperature setting (specified using the dip switches) can be changed using the pushbuttons, within the range of -4K to +4K, in steps of about 1K. Refer the setting method on next page. 30 Air Cooled Refrigeration Condensing Unit SiENBE28-901 Field Settings Tsd LRMEQ** LRLEQ** DS1 ON -10°C (0.47MPa) OFF -35°C (0.11MPa) 1 2 3 4 Factory set ON OFF 1 2 3 OFF 3 OFF 3 0°C (0.69MPa) -25°C (0.22MPa) 5°C (0.82MPa) -20°C (0.29MPa) 4 ON 4 ON 10°C (0.98MPa) OFF 1 2 -5°C (0.56MPa) OFF 3 -40°C (0.07MPa) 4 ON 1 2 -45°C (0.03MPa) 1 2 -15°C (0.37MPa) 3 OFF 4 ON 1 2 ON 1 2 -20°C (0.29MPa) Tsd LRMEQ** LRLEQ** DS1 3 4 -30°C (0.16MPa) 4 Tsd: The evaporation temperature set by the dip switches. Air Cooled Refrigeration Condensing Unit 31 Field Settings SiENBE28-901 Setting at replacement by spare PCB Caution DIP switch setting after changing the main PCB to spare parts PCB In case of repair using this part, replace the part according to the following instruction. Make the following capacity and refrigeration / freezing settings subject to application models. Cut the power supply of the outdoor unit once and switch it on again after setting the switch of subject. Freezer: LRLEQ5~20AY1 (E) LED EB**** Factory Set (the position of a switch) DS1DS2 ON OFF 1 Applicable model LRLEQ5AY1 (E) 2 3 DS1 4 1 2 3 DS2 4 Setting method (the position of switches) Set DS2-2 and DS2-4 to ON ON OFF 1 2 3 4 LRLEQ6AY1 (E) 1 2 3 4 Set DS2-1 and DS2-4 to ON ON OFF 1 2 3 4 LRLEQ8AY1 (E) 1 2 3 4 Set DS2-1, DS2-2 and DS2-4 to ON ON OFF 1 2 3 4 1 2 3 4 LRLEQ10AY1 (E) Set DS1-4 and DS2-4 to ON ON OFF 1 2 3 4 LRLEQ12AY1 (E) 1 2 3 4 Set DS1-4, DS2-2 and DS2-4 to ON ON OFF 1 2 3 4 LRLEQ15AY1 (E) 1 2 3 4 Set DS1-4, DS2-1 and DS2-4 to ON ON OFF 1 2 3 4 LRLEQ20AY1 (E) 1 2 3 4 Set DS1-4, DS2-1, DS2-2 and DS2-4 to ON ON OFF 1 2 3 4 32 1 2 3 4 Air Cooled Refrigeration Condensing Unit SiENBE28-901 Field Settings Refrigerator: LRMEQ5~20AY1 (E) LED EB**** Factory Set (the position of a switch) DS1DS2 ON OFF 1 Applicable model LRMEQ5AY1 (E) 2 3 DS1 4 1 2 3 DS2 4 Setting method (the position of switches) Set DS2-2 to ON ON OFF 1 2 3 4 LRMEQ6AY1 (E) 1 2 3 4 Set DS2-1 to ON ON OFF 1 2 3 4 LRMEQ8AY1 (E) 1 2 3 4 Set DS2-1 and DS2-2 to ON ON OFF 1 2 3 4 LRMEQ10AY1 (E) 1 2 3 4 Set DS1-4 to ON ON OFF 1 2 3 4 LRMEQ12AY1 (E) 1 2 3 4 Set DS1-4 and DS2-2 to ON ON OFF 1 2 3 4 LRMEQ15AY1 (E) 1 2 3 4 Set DS1-4 and DS2-1 to ON ON OFF 1 2 3 4 LRMEQ20AY1 (E) 1 2 3 4 Set DS1-4, DS2-1 and DS2-2 to ON ON OFF 1 2 3 4 Air Cooled Refrigeration Condensing Unit 1 2 3 4 33 Field Settings SiENBE28-901 (2) Setting in service mode Using pushbuttons on the Main PCB (A1P) enables a variety of settings shown below. BS1 BS2 BS3 MODE SET RETURN BS4 BS5 RESET The following 4 modes are available. a. Setting mode 1 ...... Initial state (while in normal operation): Used to make setting of the method of "Cool/Heat (H1P: OFF) selection". This mode is displayed while in "malfunction", "low noise control", and "demand control" as well. b. Setting mode 2 Setting mode 3 ...... Used to make changes of operating conditions or settings of a variety of addresses, (H1P: ON) mainly for service work. c. Monitor mode ...... Used to check the contents set in Setting mode 2. (H1P: BLINK) Procedure for changing mode While in each mode, use the MODE button to change settings as shown below. Setting mode 3 Simultaneously press and hold the BS1 (MODE) and BS3 (RETURN) Press and hold the BS1 for a period of 5 seconds. (MODE) for a period of Press the BS1 (MODE) (Normal) five seconds. once. Setting mode 2 Setting mode 1 Monitor mode Press the BS1 MODE MODE MODE (MODE) once. ON OFF BLINK H1P H1P H1P Steps to change mode Caution Turn off the RUN switch of the outdoor unit in case of the setting. Press and hold the BS1 (MODE) for a period of five seconds. Setting mode 2 Selection of SET setting items Press the BS3 (RETURN). Selection of SET setting contents Press the BS3 (RETURN). Display of setting contents Press the BS3 (RETURN). OP : Select mode with the use of BS2 (SET) in each selection step. Setting mode 1 (Initial state) Press the BS1 (MODE) once. Monitor mode Selection of SET check items Press the BS3 (RETURN). Display of contents Press the BS3 (RETURN). Press the BS1 (MODE). Press the BS1 (MODE). 34 Air Cooled Refrigeration Condensing Unit SiENBE28-901 Field Settings LED display when power is on H2P blinks for the first five seconds when the power supply is turned on. If the equipment is normal, H2P will be turned off in five seconds. H2P lights for abnormality. k: ON h: OFF l: BLINK No. H1P H2P H3P H4P H5P H6P H7P 1 h l k h h h h No. H1P H2P H3P H4P H5P H6P H7P 1 h h k h h h h Air Cooled Refrigeration Condensing Unit (Immediately after power on) (5 seconds after power on) 35 Field Settings SiENBE28-901 b-1. Setting mode 2 No. 0 2 Setting item Display of setting items H1P H2P H3P H4P H5P H6P H7P ΔTsp: Fine-tuning setting of evaporation temperature k Current limitation setting 3 Setting of limit value of outdoor fan taps 5 Setting of external low noise operation (Tax1, 2 and Tay1, 2 are set by setting 2-21. ) 6 k k h h h h h h h h h h h h k k h h k 0K (Factory set) -1°C -2°C -3°C -4°C ΔTsp -5°C +1°C +2°C +3°C +4°C +5°C LRM(L)EQ 5,6AY1 8,10,12AY1 15,20AY1 No limitation. (Factory set) 10A 20A 36A 9A 18A 30A 7A 14A 27A (Factory set) Setting 1 Setting 2 Setting 3 Setting 4 Setting 5 Setting of night-time low noise operation (Only connected to AIRNET) 8 Night-time low noise start setting. It uses it for setting 2-7 and 2-11. (Only connected to AIRNET) 9 Night-time low noise end setting. It uses it for setting 2-7 and 2-11. (Only connected to AIRNET) H2P H3P H4P h h h h h h h h h h h h h h h h h h h h h h h h h h k h h k h h k H5P h h h h k k k k h h h H6P H7P h h h k k h k k h h h k k h k k h h h k k h H1P H2P H3P H4P H5P H6P H7P k k k k H2P H3P H4P h h h h h h h h h h h k h k h k h h k h h h h h h k k h k k h 6 (Tamb≤Tax1) 7(Tay1<Tamb≤Tax2) 9(Tamb<Tay2) (Factory set) 5(Tamb≤Tax1) 6(Tay1<Tamb≤Tax2) 9(Tamb<Tay2) (Factory set) 0 1 63 7 H1P k k k k k k H1P k k k k k k k k k k k h h h h h h h h h h h k h h k h h k h h k h h h H5P h h k h h h H6P H7P h k k h h h h h Details depend on h h the h h following.(*1) H1P H2P H3P H4P H5P H6P H7P k AIRNET address h Display of setting conditions k k k h h h h h h h k k k h h k h h k k h h h h h k k h h h h k h H1P H2P H3P H4P k h h h k h h h ~ k h k k Standard setting 9 8 7 6 5 4 H5P H6P H7P Please give the h h h address of 1 or h k k more when you do the AIRNET. Binary system for k k k address(six digits) High static pressure setting H1P H2P 9 k h 7 k h 8 k h 6 k h 5 k h 4 k k H3P H4P H5P H6P H7P h h h h k h h h h k h h h h k h h h h k h h h h k h h h h h h 21:00 (Factory set) 22:00 23:00 20:00 H1P k k k k H2P h h h h H3P h h h h H4P H5P H6P h h h h h k h k h k h h H7P k h h h k 7:00 (Factory set) 8:00 9:00 6:00 H1P k k k k H2P h h h h H3P h h h h H4P H5P H6P h h h h h k h k h k h h H7P k h h h ΔTsn: Evaporation temperature 11 correction setting during operation at night-time k h h k h k k H1P H2P H3P H4P H5P H6P H7P +1°C(Factory set) k h h h h h k +2°C k h h h h k h +3°C k h h h k h h 0°C k h h k h h h As for Factory set, time zone between 2-8 and 2-9 becomes effective for setting. Setting of external temperature of 21 outdoor fan tap It uses it by setting 2-5. k h h k k h k Tax1 26°C 20°C 27°C Tay1 28°C 22°C 29°C Tax2 31°C 26°C 32°C Tay2 H1P H2P 33°C k h 28°C k h 34°C k h H3P H4P H5P H6P h h h h h h h k h h k h H7P k h h H1P H2P H3P H4P H5P H6P H7P of high static pressure of 40 Setting outdoor fan k h k h h h k Standard setting (Factory set) High static pressure setting k h h h h h k k h h h h k h The number in the “No.” column represent the number of times to press the SET (BS2) button. (*1) Model name Factory set Setting 1 Setting 2 Setting 3 Setting 4 Setting 5 36 Standard setting LRM(L)EQ6,12,20AY1 LRM(L)EQ5,8,10,15,20AY1 9 9 8 10 7 8 6 7 5 6 5 5 High static pressure setting LRM(L)EQ6,12,15,20AY1 LRM(L)EQ5,8,10AY1 8 8 7 9 6 7 5 6 5 5 5 5 Air Cooled Refrigeration Condensing Unit SiENBE28-901 Field Settings b-2. Setting mode 2 (for service) 4 Setting item Display of setting items H1P H2P H3P H4P H5P H6P H7P INV compressor max. frequency step control Setting of night-time compressor reduction 10 frequency Set the start time with 2-8, set the end time with 2-9. k k h h h h h k k h h k Display of setting conditions 5A 6A 15 21 14 18 13 17 21 16 15 14 8A 34 38 42 10A 39 36 42 40 36 35 34 12A 15A 20A H1P H2P 42 58 62 k h 38 62 58 k h 36 57 k h 60 k h 56 k h 55 k h 54 k h h Compressor step control No. h 5A 6A 8A 10A 12A 15A 20A Compressor steps (Factory set) Setting step: 1 Setting step: 2 Setting step: 2 Setting step: 4 Setting step: 3 Setting step: 6 Setting step: 4 Setting step: 8 Setting step: 5 Setting step: 10 Setting step: 6 Setting step: 12 of fan revolution 14 Correction according to the high pressure k h h k k k h recovery continuous operation 19 Oil time k h k h h k k change for cooling capacity 20 Speed reduction k h k h k h h H1P k k k k k k k H3P h h h h h h h H4P h h h h h h h H5P H6P H7P h h h h h k h k h h k k k h h k h k k k h (Factory set) H2P h h h h h h h H3P h h h h h h h H4P h h h h h h h H5P h h h h k k k H6P h h k k h h k H7P h k h k h k h High pressure correction = 0 (Factory set) High pressure correction = -0.2 High pressure correction = 0.2 High pressure correction = 0.4 High pressure correction = 0.6 H1P k k k k k H2P h h h h h H3P h h h h k H4P h h h k h H5P H6P H7P h h k h k h k h h h h h h h h 40 min. (Factory set) 30 min. 20 min. H1P k k k H2P h h h H3P h h h H4P h h h H5P H6P H7P h h k h k h k h h 30 sec. (Factory set) 10 sec. H1P H2P H3P H4P H5P H6P H7P k h h h h h k k h h h h k h 27 INV compressor forced stop k h k k h k k H1P H2P H3P H4P H5P H6P H7P Normal control (Factory set) k h h h h h k Inverter compressor forced stop k h h h h k h To reset the compressor after a forced stop, turn the power off and back on again. 43 STD1 compressor forced stop k k h k h k k H1P H2P H3P H4P H5P H6P H7P Normal control (Factory set) k h h h h h k STD1 compressor forced stop k h h h h k h To reset the compressor after a forced stop, turn the power off and back on again. 44 STD2 compressor forced stop k k h k k h h H1P H2P H3P H4P H5P H6P H7P Normal control (Factory set) k h h h h h k STD2 compressor forced stop k h h h h k h To reset the compressor after a forced stop, turn the power off and back on again. c. Setting mode 3 (for servicing) No. Setting item Display of setting items H1P H2P H3P H4P H5P H6P H7P the compressor steps 3-21 Changing during target oil recovery k k h k k h h Display of setting conditions Compressor frequency 5A, 6A 8A, 10A, 12A 15A, 20A H1P H2P H3P H4P H5P H6P H7P 13 27 34 k h h h h h k Factory set 17 31 42 k h h h h k h c. Setting mode 3 (for servicing) Check when malfunction code “PJ” is displayed. No. Setting item Display of setting items H1P H2P H3P H4P H5P H6P H7P 3-10 Capacity setting k h h k h k h 3-26 Setting the freezing and refrigeration k h k k h k h 3-39 Power supply voltage setting k k h h k k k Air Cooled Refrigeration Condensing Unit Display of setting conditions LRM(L)EQ5AY1 LRM(L)EQ6AY1 LRM(L)EQ8AY1 LRM(L)EQ10AY1 LRM(L)EQ12AY1 LRM(L)EQ15AY1 LRM(L)EQ20AY1 H1P k k k k k k k H2P h h h h h h h H3P h h h h h h h H4P h h h h h h k H5P H6P H7P h h k h k h h k k k h h k h k k k k h h h Effective setting of Dip switches Freezing Refrigeration H1P k k k H2P h h h H3P h h h H4P h h h H5P H6P H7P h h k h k h k h h 200V 400V H1P H2P H3P H4P H5P H6P H7P k h h h h h k k h h h h k h 37 Field Settings SiENBE28-901 d. Setting method with the AIRNET or type-III checker. 1) In case of the AIRNET • Use Setting Mode 2-6 (AIRNET address). • Use Setting Mode 2-16 (virtual indoor unit address). 2) In case of a Type-III checker • Use Setting Mode 2-16 (virtual indoor unit address). No. 6 Setting item Display of setting items H1P H2P H3P H4P H5P H6P H7P AIRNET address k h h h k k h Display of setting conditions (Factory set) 0 1 63 (Factory set) 0 1 16 Virtual indoor unit address setting 38 k h k h h h 63 H1P H2P H3P H4P H5P H6P H7P Please give the k h h h h h h address of 1 or more to when you k h h h h h k do the AIRNET. ~ Uses binary numbers for the k k k k k k k address (six digits). H1P H2P H3P H4P k h h h k h h h ~ k k k k H5P H6P H7P h h h h h k k k k h • When there is 1 outdoor unit, set the address to "1". • When there are multiple outdoor units (outdoor-outdoor transmission connection), contact the After Sales Service Division. Air Cooled Refrigeration Condensing Unit SiENBE28-901 Field Settings 3.1.1 Evaporation temperature correction at night-time, using an external contact The two methods can be used to increase the evaporation temperature at night-time below: 1. Receiving the time setting from the AIRNET (Setting Mode 2-8·9). 2. Using an external contact. The following describes the wiring needed to use an external contact. By a short-circuit between terminals A and C on the PCB (A5P) in the control box, the evaporation temperature can be corrected at night-time. For details about the wiring, refer to Figure 1. Protect the terminals using insulation sleeves or equivalent. A5P Electric wire thickness Wiring length A B C Contact rating 1 0.75 - 1.25 mm2 Max. 100 m Minimum applied load 12 VDC, 1 mA or less 2 X3M Contact for an evaporation temperature correction at night-time: Contact ON: Enabled. Contact OFF: Disabled. <Figure 1> When used in conjunction with a remote switch, connect the wire to the terminal using a ring connector (refer to Figure 2), or connect it to terminal C (refer to Figure 3). The terminal connectors must be protected with insulation sleeves. A5P A5P A B C A B C 1 2 1 2 X3M X3M To remote switch To remote switch Closed-end connector <Figure 2> <Figure 3> By using the Setting Mode 2-8·9, you can change the amount of evaporation temperature shift that is allowed during the night-time evaporation temperature correction. The shift amount is factory set to 1°C. Moreover, the signal from the external contact will take precedence over the setting specified in Setting Mode 2-8·9. Air Cooled Refrigeration Condensing Unit 39 Description of Functions and Operation SiENBE28-901 4. Description of Functions and Operation 4.1 Operating Mode [Classification of operating modes] The table below lists all the operating modes available. <List of operating modes> Compressor Cooling operation (1 compressor) (2 compressors) (3 compressors) (Operating Mode) INV 1 INV+STD1 2 INV+STD1+STD2 3 INV+STD2 4 STD1 5 STD1+STD2 6 STD2 7 k k k k k k k k k k k 1 There are 8 operating modes available. (This includes a mode in which the system is stopped.) 2 Operating modes 5, 6 and 7 are INV compressor abnormal operation modes. If operating mode is 4 or 7, the STD1 compressor may be defective. If operating mode is 1, 2 or 5, the STD2 compressor may be defective. 3 The state in which all the compressors are stopped is operating mode 0. 40 Air Cooled Refrigeration Condensing Unit SiENBE28-901 Description of Functions and Operation 1) Operation Mode 1 <In case of 1 compressor> Ta Ti HPSL HPS1 HP Td1 INV LP Tg Tce EV2 EV1 TL <In case of 2 compressors> Ta Ti HPSL HP HPS1 LP HPS2 Td1 Td2 INV EV3 STD1 SV2 Tce Tg TL EV2 Air Cooled Refrigeration Condensing Unit EV1 41 Description of Functions and Operation SiENBE28-901 <In case of 3 compressors> Ti Ta HPSL HP HPS1 HPS2 Td1 EV3 HPS3 Td2 INV Td3 STD1 SV2 STD2 SV3 Tce Tg TL EV2 42 EV1 Air Cooled Refrigeration Condensing Unit SiENBE28-901 Description of Functions and Operation 2) Operation Mode 2 <In case of 2 compressors> Ta Ti HPSL HP LP HPS1 HPS2 Td1 Td2 INV STD1 EV3 Tce SV2 Tg TL EV2 EV1 <In case of 3 compressors> Ta Ti HPSL HP HPS1 HPS2 HPS3 Td1 EV3 Td2 Td3 INV STD1 STD2 Tce SV2 SV3 Tg TL EV2 EV1 Air Cooled Refrigeration Condensing Unit 43 Description of Functions and Operation SiENBE28-901 3) Operation Mode 3 <In case of 3 compressors> Ta Ti HPSL HP HPS1 HPS2 HPS3 Td1 EV3 Td2 Td3 INV STD2 STD1 Tce SV3 SV2 Tg TL EV2 EV1 4) Operation Mode 4 <In case of 3 compressors> Ta Ti HPSL HP HPS1 HPS2 HPS3 Td1 EV3 Td2 Td3 INV STD1 SV2 STD2 Tce SV3 Tg TL EV2 EV1 44 Air Cooled Refrigeration Condensing Unit SiENBE28-901 Description of Functions and Operation 5) Operation Mode 5 (Defective of INV) <In case of 2 compressors> Ta Ti HPSL HP LP HPS1 HPS2 Td1 Td2 INV STD1 EV3 Tce SV2 Tg TL EV2 EV1 <In case of 3 compressors> Ta Ti HPSL HP HPS1 HPS2 HPS3 Td1 EV3 Td2 Td3 INV STD1 STD2 Tce SV2 SV3 Tg TL EV2 EV1 Air Cooled Refrigeration Condensing Unit 45 Description of Functions and Operation SiENBE28-901 6) Operation Mode 6 (Defective of INV) <In case of 3 compressors> Ti Ta HPSL HP HPS1 HPS2 HPS3 Td1 EV3 Td2 Td3 INV STD2 STD1 Tce SV3 SV2 Tg TL EV2 EV1 7) Operation Mode 7 (Defective of INV) <In case of 3 compressors> Ti Ta HPSL HP HPS1 HPS2 HPS3 Td1 EV3 Td2 Td3 INV STD2 STD1 SV2 Tce SV3 Tg TL EV2 EV1 46 Air Cooled Refrigeration Condensing Unit SiENBE28-901 4.2 Description of Functions and Operation Outline of Functions (Input) (Output) Outdoor unit Low pressure sensor Startup control Thermostat ON/OFF High pressure sensor Compressor Electronic expansion valve Compressor control Discharge pipe thermistor Solenoid valve Outdoor fan control Outdoor fan motor Suction pipe thermistor Brazed-plate type heat exchanger inlet thermistor Electronic expansion valve control Four way valve Solenoid valve control Brazed-plate type heat exchanger outlet thermistor Outdoor heat exchanger outlet thermistor Oil return control Outdoor air thermistor Four way valve control High pressure switch High pressure protection control Protection device Low pressure protection control Overheat protection control STD compressor overcurrent protection control Earth leakage detection control Air Cooled Refrigeration Condensing Unit 47 Description of Functions and Operation 4.3 SiENBE28-901 Detailed Description of Functions (1) Startup control The actuators will be operated in the following sequence when the thermostat is turned on: 1 The outdoor fan will start to operate for 5 seconds. (This is intended to measure the outdoor temperature accurately.) 2 At power-up, the operation outputs (P1, P2) for low pressure conditions (see the chart on the right) will be turned on/off. (This is intended to avoid possible liquid compression that is caused by the thermostatic expansion valve in the showcase being fully open during startup. To prevent liquid compression, the liquid solenoid valve will be cycled on and off until the thermostatic expansion valve catches up.) 3 The compressors will be activated. 1 2 Operation prior to compressor activation Fan 3 Air flow rate corresponding to the outdoor temperature. 56Hz 52Hz 15sec 15sec Inverter compressor Activation complete Operation output 90sec This may be turned on in order to raise LP, depending on outdoor temperature and the thermostat OFF time. LP>0.49MPa: Operation output OFF LP<0.294MPa:Operation output ON (2) Thermostat ON/OFF • LP>Lpm1+0.15MPa & & or • Outdoor temperature Ta < Tsd (the evaporation temperature set by the dip switches) • 3 minutes after the thermostat is turned OFF. • LP>Lpm1 • 3 minutes after the thermostat is turned OFF. • The compressor standby mode before a restart is complete. & Thermostat OFF (Compressor stops.) Thermostat ON (Compressor starts.) • Activation complete. & or • LP < Thermostat off setting value • LP < 0 MPa continuously for 5 seconds Thermostat off setting value MT LRMEQ** 0.1MPa LT LRLEQ*** -0.015MPa Lpm: Lpm1 obtained after an outdoor temperature correction is made. Lpm1: Pressure equivalent to the evaporation temperature set by the dip switches (Tsd: Evaporation temperature set by the dip switches). LP: The pressure detected by the low pressure sensor (S1NPL) 48 Air Cooled Refrigeration Condensing Unit SiENBE28-901 Description of Functions and Operation Conversion table for using the evaporation temperature (set by the dip switches) to determine its pressure equivalent DS1 Tsd(Lpm1) LRMEQ** LRLEQ** ON -10°C (0.47MPa) OFF -35°C (0.11MPa) 1 2 3 4 Factory set ON ON OFF -45°C (0.03MPa) ON OFF 1 2 3 4 ON -40°C (0.07MPa) 1 2 3 4 ON -25°C (0.22MPa) 5°C (0.82MPa) -20°C (0.29MPa) ON 10°C (0.98MPa) OFF 1 2 3 4 -5°C (0.56MPa) OFF 0°C (0.69MPa) 1 2 3 4 -15°C (0.37MPa) OFF Tsd(Lpm1) LRMEQ** LRLEQ** 1 2 3 4 -20°C (0.29MPa) OFF DS1 -30°C (0.16MPa) 1 2 3 4 Air Cooled Refrigeration Condensing Unit 49 Description of Functions and Operation SiENBE28-901 (3) Compressor control Compressor control Normal capacity control • Increase or decrease the compressor frequency using the low pressure as a controlled variable, in order to achieve the optimum cooling capacity for the target evaporation temperature (Tst). The target evaporation temperature value used will be the one set by the dip switches. (For details, see section 2, "Field Settings"). The frequency value will be increased or decreased in steps of 1 every 30 seconds. • If the low pressure (LP) drops below a pressure equivalent to the target evaporation temperature (Lpm) –0.015 MPa, the compressor speed will be reduced by one step (every 30 seconds). • If the low pressure (LP) exceeds a pressure equivalent to the target evaporation temperature (Lpm) +0.015 MPa, the compressor speed will be increased by one step (every 30 seconds). However, the thermostat ON/OFF operation will be performed if the load is low. High compression ratio avoidance control • If the compression ratio stays above 25 for 10 seconds or more, the compressor speed will be reduced. (This is intended to protect the compressor scrolls.) Differential pressure inversion avoidance control • If the high and low pressure differential is too small, the compressor speed will be increased according to the actual differential pressure. (This is intended to maintain lubrication.) Oil return control by increasing the compressor frequency • See the "Oil return control" section. Control using a reduced LP • Reduces the number of compressors being operated or the compressor speed, according to the actual low pressure and the speed at which the pressure is reduced. • When stopping the STD compressor: & • Operation mode is not 1, 5 or 7. • Low pressure (LP) < Rapidly dropping LP • When reducing the INV compressor speed: & • Operation mode = 1 • Low pressure (LP) < LP required for shifting to minimum Hz • Values for rapidly dropping LP and the LP required for shifting to minimum Hz LRMEQ** LRLEQ** Rapidly dropping LP 0.23MPa 0.02MPa LP required for shifting 0.20MPa to minimum Hz 0.02MPa Droop control using HP • The compressor speed is lowered slightly according to the actual high pressure. High pressure (HP) > 3.23 MPa Droop control using Td • Reduces the compressor speed using the actual discharge thermistor temperature. The discharge pipe temperature (Td) ≥ 115°C for 1 minute or more. Droop control using electrical current & INV Current limit control • Control will be performed according to the electrical current setting specified in Setting Mode 2-2, as the upper limit. Note that this setting will reduce the cooling capacity. (For details about setting procedures, see the "Setting Mode 2-2" section) Droop control using INV compressor current • Reduces the compressor speed using the inverter actual secondary current. Inverter secondary current setting for activating droop control: 14.7 A Droop control using INV compressor fin temperature • Reduces the compressor speed according to the actual inverter fin temperature. Inverter fin temperature setting for activating droop control: 84°C STD compressor overcurrent protection control • If any of the following conditions is met, the INV. compressor speed will be reduced. or • The STD electrical current value>12.5 A and HP ≥ 3.28 MPa for 2 seconds. • The STD electrical current value>12 A and HP ≥ 3.28 MPa for 5 seconds. • If any of the following conditions is met, the STD compressor will be stopped. • The STD current value>14.95 A for 2.1 seconds. • The STD current value>13 A for 5 seconds. • The STD current value>12.35 A for 20 seconds. 50 Air Cooled Refrigeration Condensing Unit SiENBE28-901 Description of Functions and Operation (3)-1. Compressor steps table INV General step step INV compressor frequency (Hz) INV General step step INV compressor frequency (Hz) + the number of STD compressors INV step General step INV compressor frequency (Hz) + the number of STD compressors 0 0 0 1 21 52+STD×1 1 41 52+STD×2 1 1 52 2 22 56+STD×1 2 42 56+STD×2 2 2 56 3 23 62+STD×1 3 43 62+STD×2 3 3 62 4 24 68+STD×1 4 44 68+STD×2 4 4 68 5 25 74+STD×1 5 45 74+STD×2 5 5 74 6 26 80+STD×1 6 46 80+STD×2 6 6 80 7 27 88+STD×1 7 47 88+STD×2 7 7 88 8 28 96+STD×1 8 48 96+STD×2 8 8 96 9 29 104+STD×1 9 49 104+STD×2 9 9 104 10 30 110+STD×1 10 50 110+STD×2 10 10 110 11 31 116+STD×1 11 51 116+STD×2 11 11 116 12 32 124+STD×1 12 52 124+STD×2 12 12 124 13 33 132+STD×1 13 53 132+STD×2 13 13 132 14 34 144+STD×1 14 54 144+STD×2 14 14 144 15 35 158+STD×1 15 55 158+STD×2 15 15 158 16 36 165+STD×1 16 56 165+STD×2 16 16 165 17 37 176+STD×1 17 57 176+STD×2 17 17 176 18 38 188+STD×1 18 58 188+STD×2 18 18 188 19 39 202+STD×1 19 59 202+STD×2 19 19 202 20 40 210+STD×1 20 60 210+STD×2 20 20 210 21 41 218+STD×1 21 61 218+STD×2 21 21 218 22 42 232+STD×1 22 62 232+STD×2 Air Cooled Refrigeration Condensing Unit 8,10,12, 15,20AY1 5AY1 6AY1 (15,20AY1) 8AY1 10AY1 12AY1 15AY1 20AY1 51 Description of Functions and Operation SiENBE28-901 (4) Fan control (4)-1. Outdoor fan control The outdoor fan will be controlled using the high pressure as the controlled variable, as shown in the flow below. Outdoor fan Fan control Lpm: Pressure equivalent to the target evaporation temperature HP: High pressure Every 20 to 60 seconds Fan speed-up control <For 5, 6, 15, and 20AY1 models> Increases the speed by 1 tap. or & • Lpm < 0.59 MPa • HP > 1.86 MPa & • Lpm ≥ 0.59 MPa • HP > Lpm + 1.27 MPa <For 8, 10, and 12AY1 models> • HP ≥ Lpm + 1.47 MPa Every 60 seconds Fan speed-down control Reduces the speed by 1 tap. <For 5, 6, 15, and 20AY1 models> & • HP < Lpm + 0.69 MPa • HP < 1.27 MPa <For 8, 10, and 12AY1 models> • HP < Lpm + 0.88 MPa TcL: Saturation temperature equivalent to high pressure Ta: Outdoor temperature High pressure fan control INV fin temperature control • HP ≥ 2.74 MPa ······ Max. fan tap & • HP ≥ 2.45 MPa • TcL > Ta + 18°C ······· Increases the speed by 2 taps. & • HP ≥ 2.45 MPa • TcL ≤ Ta + 18°C ······ Increases the speed by 1 tap. & • HP ≥ 2.45 MPa • While the outdoor fan is not in operation ······ Increases the speed by 1 tap. (This assumes that the low pressure outdoor fan is being controlled.) Inverter fin temperature > 79°C ······ Increases the speed by 1 tap. (4)-2. Fan control before startup The fan revolution will be set based on the outdoor temperature. This is intended to prevent the pressure from rising too rapidly and ensure the proper differential pressure. Outdoor temperature LRM(L)EQ5AY1,6AY1 LRM(L)EQ8AY1,10AY1,12AY1 LRM(L)EQ15AY, 20AY1 Ta<3°C 0 0 0 3°C≤Ta <9°C 2 2 2 9°C≤Ta <15°C 3 3 3 15°C≤Ta <21°C 4 4 4 21°C≤Ta <28°C 5 5 5 Ta≥28°C 6 6 6 (4)-3. Outdoor fan residual operation Reduces the high pressure to some degree when the thermostat is turned off. This will minimize the amount of sluggish refrigerant that is trapped due to high pressure when the system is stopped. The fan will operate continuously for either 30 seconds after the compressors are turned off, or as long as the high pressure (HP) stays below 1.18 MPa. (4)-4. Fan upper limit control based on the outdoor temperature The fan upper speed will be limited based on the outdoor temperature. This will help reduce the operating sound. Fan tap 9 tap 6 or 7 tap 5 or 6 tap Amb. temp. (°C) 26°C 52 28°C 31°C 33°C Air Cooled Refrigeration Condensing Unit SiENBE28-901 Description of Functions and Operation (4)-5. Outdoor fan tap table LRM(L)EQ5AY1 Fan (Fan tap) Outdoor fan (standard mode) Revolution (rpm) 0 1 2 3 4 5 6 7 8 9 0 285 315 360 450 570 730 800 850 951 Fan (Fan tap) 0 1 2 3 4 5 6 7 8 9 Outdoor fan (high static pressure mode) Revolution (rpm) 0 285 315 360 450 570 730 850 Fan (Fan tap) 0 1 2 3 4 5 6 7 Outdoor fan (standard mode) Revolution (rpm) 0 285 315 360 450 570 800 951 Fan (Fan tap) 0 1 2 3 4 5 6 7 8 Outdoor fan (high static pressure mode) Revolution (rpm) 0 285 315 360 450 570 800 951 1020 Fan (Fan tap) 0 1 2 3 4 5 6 7 8 9 Outdoor fan (standard mode) Revolution (rpm) 0 350 370 400 460 530 630 680 710 760 Fan (Fan tap) 0 1 2 3 4 5 6 7 8 9 Outdoor fan (high static pressure mode) Revolution (rpm) 0 350 370 400 460 560 630 680 795 870 Fan (Fan tap) Outdoor fan (standard mode) Revolution (rpm) 0 1 2 3 4 5 6 7 8 9 0 350 370 400 460 530 630 710 760 795 Fan (Fan tap) 0 1 2 3 4 5 6 7 8 9 Outdoor fan (high static pressure mode) Revolution (rpm) 0 350 370 400 460 560 630 760 821 870 Fan (Fan tap) 0 1 2 3 4 5 6 7 8 9 Outdoor fan (standard mode) Revolution (rpm) 0 350 370 400 460 560 680 795 821 850 Fan (Fan tap) 0 1 2 3 4 5 6 7 8 Outdoor fan (high static pressure mode) Revolution (rpm) 0 350 370 400 460 560 680 795 870 Outdoor fan (standard mode) Revolution (rpm) 0 0 0 1 395 0 2 800 0 3 460 395 4 570 540 5 720 690 6 800 770 7 8 9 1050 1136 1186 1020 1106 1156 Fan (Fan tap) 0 1 2 3 4 5 6 Outdoor fan (high static pressure mode) Revolution (rpm) 0 0 395 0 800 0 460 395 570 540 720 690 800 770 Fan (Fan tap) 0 1 2 3 4 5 6 Outdoor fan (standard mode) Revolution (rpm) 0 0 395 0 800 0 460 395 570 540 800 770 930 900 Fan (Fan tap) 0 1 2 3 4 5 6 Outdoor fan (high static pressure mode) Revolution (rpm) 0 0 395 0 800 0 460 395 570 540 800 770 930 900 1000 1020 LRM(L)EQ6AY1 8 9 1000 1020 LRM(L)EQ8AY1 LRM(L)EQ10AY1 LRM(L)EQ12AY1 LRM(L)EQ15AY1 Fan (Fan tap) 7 8 1136 1235 1106 1205 LRM(L)EQ20AY1 Air Cooled Refrigeration Condensing Unit 7 8 9 1136 1186 1235 1106 1156 1205 7 8 1136 1235 1106 1205 53 Description of Functions and Operation SiENBE28-901 (5) Electrical expansion valve control (5)-1. Outdoor electrical expansion valve (Y1E(EV1)) ······ This only applies to the Japanese domestic models. The valve will be activated when the reverse cycle defrost is used. For the LRM(L)EQ** models, a "0pls" command will be used all times. (5)-2. Outdoor electrical expansion valve (Y2E(EV2)) ······ This valve will provide refrigerant gas injection flow rate control, overheating protection, and condensation protection. Initial valve opening: 43pls (mode 1), 55pls (modes other than mode 1) Control flow Outdoor EV2 condensation avoidance control Every 10 seconds & • The discharge pipe temperature thermistor value < 60°C • Intermediate superheat (SH) <8 to 12K continuously for 20 seconds or more. or or • INV compressor continues to operate for 60 seconds or more • STD compressor continues to operate for 90 seconds or more. • Min (discharge pipe SH, forecasted port SH) < 15°C Outdoor EV2 normal control Every 20 seconds or Every 20 sec. • Forecasted port temperature 1 > 110°C • Forecasted port temperature 2 > 130°C • Discharge pipe temperature > 90°C • Discharge pipe temperature > 80°C • Discharge pipe temperature ≤ 80°C Outdoor EV2 overheat protection control Discharge gas temperature control • The target discharge pipe temperature is controlled to be 90°C. Intermediate SH control • Controlled for target intermediate SH (8 to 12°C) (5)-3. Outdoor electronic expansion valve (Y3E(EV3)) ······ An electronic expansion valve is installed in the intermediate injection line of the INV compressor. The valve will operate in synch with the INV compressor, and allow the refrigeration oil to be returned to the INV compressor(s) that are in operation. It also creates an economizer circuit by means of gas injection. In addition, the valve will control the difference in discharge pipe temperatures between INV and STD compressors. Outdoor EV3 control Operation of one INV compressor • EV3: 480pls INV compressor + STD compressor • EV3 will be controlled using the difference in discharge pipe temperatures of the INV and STD compressors. 43pls ≤ EV3 ≤ 480pls (6) Solenoid valve control For 8, 10, 12, 15, and 20 AY1 models, a solenoid valve is installed in the intermediate injection line of the STD compressor. The valve will operate in synch with STD compressor, and allow the refrigeration oil to be returned to the STD compressor(s) that are in operation. Additionally, the valve will create a gas injection economizer circuit. 54 Air Cooled Refrigeration Condensing Unit SiENBE28-901 Description of Functions and Operation (7) Oil return control Recover the refrigeration oil that has been left standing in the system at regular intervals. Recover the oil into the outdoor unit, using a timer and low pressure. Oil return control Normal capacity control Oil return by turning on/off the indoor unit solenoid valve Objective: Recovers the refrigeration oil from the evaporator by putting the refrigerant into a wet state by utilizing a delay in response to the mechanical expansion valve. The operation output will be turned on/off using the actual low pressure. Oil return by increasing the compressor frequency Objective: Increases the compressor speed to provide sufficient refrigerant speed in the suction pipe. Then the oil left standing in the suction pipe will be recovered into the outdoor unit. • Continuous operation time during oil return ≥ 40 minutes or Recovering the oil by turning on/off the indoor solenoid valve or • 90 seconds have passed • Low pressure (LP) ≥ 0.196 MPa Indoor solenoid valve: ON Indoor solenoid valve: OFF or Normal performance control • The circulating volume used for oil return continues to be less than specified for 60 to 120 minutes or more. (*1) or • The circulating volume used for oil return continues to be more than specified for 5 minutes • Oil return has continued for 10 minutes. • HP<3.04MPa • LP>0.245MPa • HP<3.04MPa • LP<0.196MPa • 30 seconds have passed. Recover the oil by increasing the compressor frequency (*1) Compressor steps Low load LP Low High load Oil return interval: Long High Oil return interval: Short (8) Four way valve control To standardize the hardware with the Japanese domestic models, the European models are also equipped with four-way valves. The circulation volume has been factory set to insure that the four-way valve switches over properly. This allows the valve to be initialized to the proper position when the power is turned on. ON condition: The valve will be activated when the differential pressure at start-up is 0.294 MPa or less. OFF condition: The differential pressure stays above 0.49 MPa for 10 seconds, or the watchdog timer reaches 90 seconds. (Low, high pressure and discharge gas protection will take priority.) For 5 and 6 AY1 models, the INV compressor steps will be increased. For the other models, the STD compressors will be operated. (9) High pressure protection control If the following condition is met, the compressor load will be reduced significantly, as shown in the block diagram below. After multiple retries are made and the retry counter is reached, the compressor will stop and declare a problem (abnormal stop). (For details, see the list of errors.) The high-pressure retry code "E3" and the number of retries will be sent to the AIRNET. High pressure sensor>3.479 MPa. 3, 4 Stops the STD2 compressor. Operating mode 2, 5 Stops the STD1 compressor. 1 Reduces the INV compressor by 5 steps. If the high pressure switch (operating pressure: 3.8 MPa) is activated (high pressure sensor reading ≥ 3.567 MPa), the compressor will stop and declare a problem (abnormal stop). To reset, turn off the power switch (or operation switch) and turn it back on again. Air Cooled Refrigeration Condensing Unit 55 Description of Functions and Operation SiENBE28-901 (10) Low pressure protection control If the pressure drops below 0.00 MPa, the system will cease operation. After 2 to 10 minutes in standby, the system will resume operation. For a period of 3 hours after power-up, the system will continue to check whether the suction stop valve is closed. If the stop valve is seen to be closed, the system will stop and declare a problem (abnormal stop). Three hours after the system was turned on, the system will no longer stop due to an abnormally low pressure. (The low pressure retry code "E4" will be sent to the AIRNET.) (11) Overheat protection control If any of the following conditions is met, the system will cease operation. INV compressors will resume operation after 2 to 6 minutes in standby, while STD compressors will restart after 3 to 10 minutes. If a particular compressor repeats this procedure 10 times, "F3" will be sent to the AIRNET; if it repeats it 15 times, the compressor will stop. For 5 and 6AY1 models, the compressors will stop and declare a problem (abnormal stop). For 8, 10, 12, 15, and 20AY1 models, the remaining compressors will perform a backup operation. • The discharge gas temperature >120°C for 70 seconds. • The discharge gas temperature >125°C for 30 seconds. • The discharge gas temperature >130°C If the following condition is met, the relevant compressor will stop immediately and declare a problem (abnormal stop). The discharge gas temperature ≥150°C. or (12) STD compressor overcurrent protection control The following condition is met, the system will stop operation. STD compressors will resume operation after 30 minutes in standby. If a compressor repeats this procedure twice, "E0" will be sent to the AIRNET. If it repeats it three times, the relevant compressor will stop. The STD compressor current >14.95A for 2.1 seconds or more. (13) Earth leakage detection control 1. Detection using a earth leakage detection board If the high-pressure sensor reading exceeds 3.567 MPa, the earth leakage detector PCB will be activated. Then the compressor operation will stop and declare a problem (abnormal stop). To reset, turn off the power switch (or operation switch) and turn it back on again. 2. Detection during initial power-up The system will check for earth leakage while the compressor is running for the first 10 seconds after power-up. A compressor will stop abnormally if the power breaker is turned off or the earth leakage detector PCB is activated during the 10-second period describe above. If the breaker is turned off, turn the breaker on again. If the same thing happens again, disable the defective compressor and perform a backup operation using the remaining compressors. With the operation switch in OFF, reset the system by turning on the power off and then back on again. 56 Air Cooled Refrigeration Condensing Unit SiENBE28-901 Test Operation 5. Test Operation 5.1 Refrigerant Piping [REFRIGERANT] This System use R410A refrigerant. Caution This unit is already filled with a certain amount of R410A. Never open liquid and gas shutoff valve until the step Specified in “5.4. CHECKS AFTER WORK COMPLETION”. The refrigerant R410A requires strict cautions for keeping the system clean, dry and tight. Read this chapter carefully and follow these procedures correctly. A.Clean and dry Foreign materials (including mineral oils such as SUNISO oil or moisture) should be prevented from getting mixed into the system. B.Tight Take care to keep the system tight when installing. R410A does not contain any chlorine, does not destroy the ozone layer, and does not reduce the earth’s protection against harmful ultraviolet radiation. R410A can contribute slightly to the greenhouse effect if it is released. Since R410A is a mixed refrigerant, the required additional refrigerant must be charged in its liquid state. If the refrigerant is charged in a state of gas, its composition changes and the system will not work properly. Be sure to perform refrigerant replenishment. Refer to “5.4 CHECKS AFTER WORK COMPLETION” and the label of instructions on refrigerant replenishment on the cover surface of the control box, [Important information regarding the refrigerant used] This product contains fluorinated greenhouse gases covered by the Kyoto Protocol. Do not vent gases into the atmosphere. Refrigerant type : R410A GWP(1) value : 2090 (1) GWP = global warming potential Please fill in with indelible ink, 1 the factory refrigerant charge of the product, 2 the additional refrigerant amount charged in the field and 1 + 2 the total refrigerant charge on the refrigerant charge label supplied with the product. The filled out label must be adhered in the proximity of the product charging port (e.g. onto the inside of the service cover). Contains fluorinated greenhouse gases covered by the Kyoto Protocol R410A (2) 4 (1)= kg (2)= kg (1)+(2)= kg 1 1 factory refrigerant charge of the product : see unit name plate 2 2 additional refrigerant amount charged in the field (1) 6 5 3 total refrigerant charge 3 4 Contains fluorinated greenhouse gases covered by the Kyoto Protocol 5 outdoor unit 6 refrigerant cylinder and manifold for charging [DESIGN PRESSURE] Since design pressure is 3.8MPa or 38bar (for R407C units : 3.3MPa or 33bar), the wall thickness of pipes should be more carefully selected in accordance with the relevant local and national regulations. Air Cooled Refrigeration Condensing Unit 57 Test Operation SiENBE28-901 5.1.1 To Piping Work Contractors Never open the shutoff valve until the steps specified in “5.2 FIELD WIRING” and “5.3.3 Checking of device and installation conditions” of piping. Do not use flux at the time of brazing and connecting refrigerant pipes. Use phosphorous copper brazing filler metal (BCuP-2), which does not require flux. Chlorine-based flux causes piping corrosion. Furthermore, if fluoride is contained, the flux will have adverse influences on the refrigerant piping line, such as the deterioration of refrigerating machine oil. Caution All field piping must be installed by a licensed refrigeration technician and must comply with relevant local and national regulations. [Precautions for reuse of existing refrigerant piping / heat exchangers] Keep the following points in mind for the reuse of existing refrigerant piping / heat exchangers. A malfunction may result if there is deficiency. Do not use the existing piping in the following cases. Perform new piping instead. • The piping is different in size. • The strength of the piping is insufficient. • The compressor of the condensing unit previously used caused a malfunction. An adverse influence of residual substances, such as the oxidation of refrigerant oil and the generation of scale, is considered. • If the indoor unit or outdoor unit is disconnected from the piping for a long time. The intrusion of water and dust into the piping is considered. • The copper pipe is corroded. • The refrigerant of the condensing unit previously used was other than R410A (e.g., R404A / R507 or R407C). The contamination of the refrigerant with heterogeneity is considered. If there are welded connections midway on the local piping, make gas leakage checks on the welded connections. Be sure to insulate the connection piping. The liquid and gas pipe temperatures are as follows: Liquid pipe arrival minimum temperature: 0°C Gas pipe arrival minimum temperature: –26°C (Refrigeration Series) –46°C (Freezer Series) In the case of thickness insufficiency, add additional insulation material or renew the existing insulation material. Renew the insulation material if the insulation material is degraded. Keep the following points in mind for the reuse of existing heat exchangers Units with insufficient design pressure (since this product is an R410A unit) require a lowerstage design pressure of 2.5 MPa [25 bars]. Units for which the path to the heat exchanger has been routed so that the flow of refrigerant is from bottom to top Units with copper tubing or fan corrosion Units that may be contaminated with foreign matter such as rubbish or other dirt 58 Air Cooled Refrigeration Condensing Unit SiENBE28-901 Test Operation 5.1.2 Selection of Piping Material Make sure that the inner side and outer side of the piping used is clean and free of contaminants, such as sulphur, oxide, dust, chips, oil and fat, and water. It is desirable that the maximum oil adhesion in the piping is 30 mg per 10 m. Use the following type of refrigerant piping. Material: Seamless phosphorus deoxidized copper tube (C1220T-O for a maximum outer diameter of 15.9 mm and C1220T-1/2H for a minimum outer diameter of 19.1 mm) Refrigerant piping size and wall thickness: Decide the size and thickness from the following table. (This product uses R410A. The withstand pressure of O type may be insufficient if it is used for piping with a minimum diameter of 19.1 mm. Therefore, be sure to use 1/2 H type with a minimum thickness of 1.0 mm. If O type is used for piping with a minimum diameter of 19.1 mm, a minimum thickness of 1.2 mm will be required. In that case, be sure to perform the blazing of each joint.) Be sure to perform piping work within the range specified in the following table. ¢Refrigerant piping length² Max. permissible LRMEQ5~20AY1 one-way piping length (equivalent length) LRLEQ5~20AY1 a + b + c + d ≤ 130m (d is d1 or d2 or e, f whichever is longer) Max. branch piping length (actual length) b + c + d ≤ 30m (d is d1 or d2 whichever is longer) Max. difference in unit below outdoor unit height between indoor unit above outdoor unit and outdoor units H ≤ 35m (Note) H ≤ 10m Difference in height between indoor units H1 ≤ 5m Outdoor unit H Gas piping a + b + c + d ≤ 70m (d is d1 or d2 whichever is longer) Liquid piping A B C F E D2 D1 Showcase H1 Note: A trap is required at 5 m intervals from outdoor unit. f e d1 Unit cooler a b c d2 ¢Refrigerant piping size² (MT (Medium Temperature)) LRMEQ5~20AY1 (Unit : mm) Piping size Outdoor unit side Liquid pipe Gas pipe 50m or less 50~130m 50m or less 50~130m 5A · 6A type φ9.5 × 0.8 (O type) φ12.7 × 0.8 (O type) φ19.1 × 1.0 (1/2H type) φ22.2 × 1.0 (1/2H type) 8A · 10A · 12A type φ9.5 × 0.8 (O type) φ12.7 × 0.8 (O type) φ25.4 × 1.0 (1/2H type) φ28.6 × 1.0 (1/2H type) 15A · 20A type φ12.7 × 0.8 (O type) φ15.9 × 1.0 (O type) φ31.8 × 1.1 (1/2H type) φ34.9 × 1.1 (1/2H type) Piping between branching areas Select the piping from the following table in accordance with the total capacity of indoor units (B, b, C, c) connected downstream. Total capacity of indoor units after branching Less than 6.0 kW Gas pipe size φ12.7 × 0.8 (O type) 6.0 kW or over and less than 9.9 kW φ15.9 × 1.0 (O type) 9.9 kW or over and less than 14.5 kW φ19.1 × 1.0 (1/2H type) 14.5 kW or over and less than 18.5 kW φ22.2 × 1.0 (1/2H type) 18.5 kW or over and less than 25.0 kW φ25.4 × 1.0 (1/2H type) 25.0 kW or over and less than 31.0 kW φ28.6 × 1.0 (1/2H type) Liquid pipe size φ6.4 × 0.8 (O type) φ9.5 × 0.8 (O type) φ12.7 × 0.8 (O type) 31.0 kW or over φ31.8 × 1.1 (1/2H type) No size after branching can exceed the size of any upstream piping. Piping between branching areas and each unit Adjust the size of the piping so that it will coincide with the size of piping connecting to the indoor unit. (LT (Low Temperature)) LRLEQ5~20AY1 (Unit : mm) Piping size Outdoor unit side Liquid pipe Gas pipe 50m or less 50~70m 25m or less 25~70mm 5A · 6A type φ9.5 × 0.8 (O type) φ12.7 × 0.8 (O type) φ19.1 × 1.0 (1/2H type) φ22.2 × 1.0 (1/2H type) 8A · 10A · 12A type φ9.5 × 0.8 (O type) φ12.7 × 0.8 (O type) φ25.4 × 1.0 (1/2H type) φ28.6 × 1.0 (1/2H type) 15A · 20A type φ12.7 × 0.8 (O type) φ15.9 × 1.0 (O type) φ31.8 × 1.1 (1/2H type) φ34.9 × 1.1 (1/2H type) Piping between branching areas Select the piping from the following table in accordance with the total capacity of indoor units (B, b, C, c) connected downstream. Total capacity of indoor units after branching Gas pipe size Liquid pipe size Piping between branching areas and each unit Less than 2.3 kW φ12.7 × 0.8 (O type) 2.3 kW or over and less than 4.4 kW φ15.9 × 1.0 (O type) 4.4 kW or over and less than 6.4 kW φ19.1 × 1.0 (1/2H type) 6.4 kW or over and less than 7.8 kW φ22.2 × 1.0 (1/2H type) 7.8 kW or over and less than 10.8 kW φ25.4 × 1.0 (1/2H type) 10.8 kW or over and less than 13.4 kW φ28.6 × 1.0 (1/2H type) φ6.4 × 0.8 (O type) φ9.5 × 0.8 (O type) φ12.7 × 0.8 (O type) 13.4 kW or over φ31.8 × 1.1 (1/2H type) No size after branching can exceed the size of any upstream piping. Adjust the size of the piping so that it will coincide with the size of piping connecting to the indoor unit. Air Cooled Refrigeration Condensing Unit 59 Test Operation SiENBE28-901 5.1.3 Drier Installation Caution This product requires that a drier be installed on liquid piping on site. (Operating the unit without a drier installed may result in equipment failure.) Select a drier from the following chart: Required dryer core (recommended type) Model LRMEQ5AY1, LRLEQ5AY1 LRMEQ6AY1, LRLEQ6AY1 80g (100% molecular sieve equivalent) (DML083/DML083S : Danfoss made) LRMEQ8AY1, LRLEQ8AY1 LRMEQ10AY1, LRLEQ10AY1 LRMEQ12AY1, LRLEQ12AY1 160g (100% molecular sieve equivalent) (DML163/DML163S : Danfoss made) LRMEQ15AY1, LRLEQ15AY1 LRMEQ20AY1, LRLEQ20AY1 160g (100% molecular sieve equivalent) (DML164/DML164S : Danfoss made) Install the drier in a horizontal orientation wherever possible. Install the drier as close to the outdoor unit as possible. Remove the drier cap immediately before brazing (to prevent absorption of airborne moisture). Follow instructions in the drier instruction manual concerning drier brazing. Repair any burning of drier paint that occurs during drier brazing. Contact the manufacturer for more information about paint for repair use. Flow direction is specified for some type of the dryer. Set the flow direction according to the operation manual of the dryer. 5.1.4 Operation Method of Shutoff Valves Follow the instructions below when operating each shutoff valve. Caution Do not open the shutoff valve until the steps specified in “5.3.3 Checking of device and installation conditions” is completed. Do not leave the shutoff valve opened without turning the power on, otherwise refrigerant may be condensed in the compressor and the insulation of the main power supply circuit may be degraded. Be sure to use an exclusive tool to handle the shutoff valve. The shutoff valve is not of back sheet type. Excessive force imposed may break the valve. Use a charge hose when using the service port. Make sure that there is no refrigerant gas leakage after the valve cover and cap are securely tightened. ¢Tightening torque² Check with the following table the sizes of shutoff valves incorporated by each model and the tightening torque values of the respective shutoff valves. Shutoff valve sizes 5A type 6A type 8A type Liquid side shutoff valve Gas side shutoff valve 10A type 12A type 15A type 20A type φ9.5 φ19.1 φ12.7 φ25.4 φ31.8 Service port Valve cover Hexagon hole Sealing part 60 Shaft Air Cooled Refrigeration Condensing Unit SiENBE28-901 Test Operation Tightening torque N•m (closes clockwise) Shutoff valve sizes Shaft (valve body) φ9.5 5.4~6.5 φ12.7 φ19.1 φ25.4 φ31.8 Valve cover Service port 13.5~16.5 8.1~9.9 Hexagon wrench: 4mm 18.0~22.0 27.0~33.0 Hexagon wrench: 8mm 22.5~27.5 26.5~29.4 Hexagon wrench: 10mm 44.1~53.9 11.5~13.9 ¢Opening method² 1. Remove the valve cover and turn the shaft anticlockwise with a hexagon wrench. 2. Turn the shaft until the shaft stops. 3. Tighten the valve cover securely. Refer to the above table for the tightening torque according to the size. ¢Closing method² 1. Remove the valve cover and turn the shaft clockwise with a hexagon wrench. 2. Tighten the shaft until the shaft comes in contact with the sealing part of the valve. 3. Tighten the valve cover securely. Refer to the above table for the tightening torque according to the size. ¢Handling Precautions for Valve Cover² Be careful not to damage the sealing part. At the time of mounting the valve cover, apply a screw lock agent to the screw thread. Do not apply a screw lock agent (for flare nut use) to the sealing part. Be sure to tighten the valve cover securely after operating the valve. Refer to “Operation Method of Shutoff Valves” for the tightening torque of the valve. Screw thread Apply a screw lock agent Valve cover Sealing part Not apply a screw lock agent Shutoff valve Part of mounting the valve cover. ¢Handling Precautions for Service Port² Work on the service port with a charge hose provided with a pushing rod. At the time of mounting the cap, apply a screw lock agent to the screw thread. Do not apply a screw lock agent (for flare nut use) to the sealing part. Be sure to tighten the cap securely after the work. Refer to “Operation Method of Shutoff Valves” for the tightening torque of the cap. Cap Sealing part Not apply a screw lock agent Air Cooled Refrigeration Condensing Unit Screw thread Apply a screw lock agent 61 Test Operation SiENBE28-901 5.1.5 Precautions for Piping Perform piping branching with the following conditions kept in mind. At the time of branching the liquid piping, use a T-joint or Y-joint and branch it horizontally. This will prevent an uneven flow of refrigerant. At the time of branching gas piping, use a T-joint and branch it so that the branched piping will be located above the main piping (see the illustration below). This will prevent the stay of refrigerant oil in the indoor unit not in operation. Use a Y-joint for the liquid refrigerant branch and have the piping branch horizontally. Horizontal surface Y-joint ±30° or less A-arrow view A Use a T-joint for the gas refrigerant branch and connect from the top of the main piping. T-joint Main piping Indoor unit side Branch piping T-joint Branch piping Make the piping slant downward Make the piping slant downward Main piping Make the piping slant downward Outdoor unit side Make sure that the horizontal portion of the gas piping slants downward to the outdoor unit (see the illustration above). If the outdoor unit is located above, make a trap on the gas pipe at 5 m intervals from outdoor unit. This will ensure the smooth returning of oil in the piping slanting upward. 62 Air Cooled Refrigeration Condensing Unit SiENBE28-901 5.2 Test Operation Field Wiring 5.2.1 Procedure for Power Supply Wiring ¢Procedure for Power Supply Wiring² 1 2 B 3 4 5 L1 L2 6 L3 N 10 9 8 7 1 Power supply (3φ 380~415) 2 Branch switch or overcurrent circuit breaker (earth leakage circuit breaker) 3 Earth wire 4 Power supply terminal block 5 Mount insulation sleeves 6 Fix the power supply wiring for phases L1, L2, L3, and N, respectively, with the provided clamp (1) to the resin clamp. 7 Fix the earth wire to the power supply wire (phase N) with the provided clamp (1). 8 Earth wire Perform wiring so that the earth wire will not come in contact with lead wires of the compressor. Otherwise, noise generated may have a bad influence on other equipment. 9 Ground terminal 10 • When two wires are connected to a single terminal, connect them so that the rear sides of the crimp contacts face each other. • Also, make sure the thinner wire is on top, securing the two wires simultaneously to the resin hook using the accessory clamp (1). Clamp (1) Terminal block Crip style terminal Wire: narrow Wire: thick Resin hook Power circuit, safety device, and cable requirements A power circuit (see the following table) must be provided for connection of the unit. This circuit must be protected with the required safety devices, i.e. a main switch, a slow blow fuse on each phase and an earth leakage circuit breaker. When using residual current operated circuit breakers, be sure to use a high-speed type (1 second or less) 200mA rated residual operating current. Use copper conductors only. Use insulated wire for the power cord. Select the power supply cable type and size in accordance with relevant local and national regulations. Specifications for local wiring are in compliance with IEC60245. Use wire type H05VV when protected pipes are used. Use wire type H07RN-F when protected pipes are not used. Phase and frequency Voltage φ3, 50Hz 380-415V 12.7A 15A φ3, 50Hz 380-415V 13.6A 15A φ3, 50Hz 380-415V 19.2A 25A φ3, 50Hz 380-415V 21.9A 25A φ3, 50Hz 380-415V 23.9A 25A φ3, 50Hz 380-415V 31.2A 40A φ3, 50Hz 380-415V 34.8A 40A LRMEQ5AY1 LRLEQ5AY1 LRMEQ6AY1 LRLEQ6AY1 LRMEQ8AY1 LRLEQ8AY1 LRMEQ10AY1 LRLEQ10AY1 LRMEQ12AY1 LRLEQ12AY1 LRMEQ15AY1 LRLEQ15AY1 LRMEQ20AY1 LRLEQ20AY1 Air Cooled Refrigeration Condensing Unit Minimum circuit amp. Recommended fuses 63 Test Operation SiENBE28-901 Point for attention regarding quality of the public electric power supply This equipment complies with respectively: EN/IEC61000-3-11(1) provided that the system impedance Zsys is less than or equal to Zmax and EN/IEC61000-3-12(2) provided that the short-circuit power Ssc is greater than or equal to the minimum Ssc value at the interface point between the user’s supply and the public system. It is the responsibility of the installer or user of the equipment to ensure. by consultation with the distribution network operator if necessary, that the equipment is connected only to a supply with respectively: Zsys less than or equal to Zmax and Ssc greater than or equal to the minimum Ssc value. Zmax (Ω) minimum Ssc value – – – – 0.27 652kVA 0.27 896kVA 0.27 1093kVA 0.24 757kVA 0.24 941kVA LRMEQ5AY1 LRLEQ5AY1 LRMEQ6AY1 LRLEQ6AY1 LRMEQ8AY1 LRLEQ8AY1 LRMEQ10AY1 LRLEQ10AY1 LRMEQ12AY1 LRLEQ12AY1 LRMEQ15AY1 LRLEQ15AY1 LRMEQ20AY1 LRLEQ20AY1 (1) European/International Technical Standard setting the limits for voltage changes. Voltage fluctuations and flicker in public low-voltage supply systems for equipment with rated current ≤ 75A (2) European/International Technical Standard setting the limits for harmonic currents produced by equipment connected to public low-voltage systems with input current > 16A and ≤ 75A per phase. Warning, alarm, and operation output wiring connections Connect warning, alarm, and operation output wiring to the X2M terminal block and clamp as indicated by the following diagram: X2M C C1 W1 P1 P2 Mount insulation sleeves Fix the wiring with the provided clamp (1) X2M wire specifications Electric wire thickness Max. wiring length 64 0.75~1.25mm2 130m Air Cooled Refrigeration Condensing Unit SiENBE28-901 Test Operation Remote operating switch wiring connections When installing a remote operating switch, clamp as indicated by the following diagram: X3M 1 2 Secure remote operating switch wiring to the resin block using a clamp (field supply). X3M wire specifications Electric wire thickness Max. wiring length Caution 0.75~1.25mm2 130m For Remote switch, use non-voltage contact for microcurrent (not more than 1mA, 12VDC) If the remote operating switch will be used to start and stop the unit, set the operating switch to “REMOTE”. Air Cooled Refrigeration Condensing Unit 65 Test Operation 5.3 SiENBE28-901 Inspection and Pipe Insulation For piping work contractor, electrical work contractor, and trial run workers Never open the shutoff valve until the insulation measurement of the main power supply circuit is finished. The measured insulation value will become lower if the measurement is made with the shutoff valve opened. On completion of inspection and refrigerant charging, open the shutoff valve. The compressor will malfunction if the condensing unit is operated with the shutoff valve closed. 5.3.1 Air tight Test/Vacuum Drying Refrigerant is enclosed in the unit. Be sure to keep both liquid and gas shutoff valves closed at the time of an airtight test or vacuum drying of the local piping. [For piping work contractor] On completion of piping work, make the following inspection precisely. To ensure that the condensing unit withstand pressure properly and prevent the penetration of foreign substances, be sure to use R410A-dedicated tools. Gauge manifold Charge hose To ensure that the condensing unit withstand pressure properly and prevent the penetration of foreign substances (water, dirt, and dust), use an R410A-dedicated gage manifold and charge hose. R410Adedicated tools and R407C-dedicated tools are different in screw specification. Vacuum pump Pay the utmost attention so that the pump oil will not flow backward into the system while the pump is not in operation. Use a vacuum pump that can vacuum down to –100.7kPa (5 Torr or –755mmHg). Gas for airtight test use Nitrogen gas Air tight Pressurize the high-pressure section of the system (liquid piping) to 3.8 MPa (38 bar) and the low-pressure section of the system (gas piping) to the design pressure (*1) of the indoor unit (field supply) from the service port (*2) (do not exceed the design pressure). The system is considered to have passed if there is no decrease in the pressure over a period of 24 hours. If there is a decrease in the pressure, check for and repair leaks. Vacuum drying Connect a vacuum pump to the service ports (*) of both the liquid and gas pipes for at least 2 hours and vacuum the unit down to –100.7 kPa or below. Then leave the unit for at least 1 hour at a pressure of –100.7 kPa or below and check that the vacuum gage reading will not rise. If the pressure rises, there is residual water in the system or the system has leakage. *1 Contact the manufacturer in advance for more information about the design pressure of the indoor unit (field supply). *2 Refer to the instruction label on the front panel of the outdoor unit (below) for the position of the service port. Position of instruction label Label 66 Air Cooled Refrigeration Condensing Unit SiENBE28-901 Test Operation Gas side shutoff valve Shutoff valve service port Nitrogen Tank R410A Used for refrigerant replenishment (with siphon) Pressure-reducing valve Meter Liquid side shutoff valve Charge hose Valve Outdoor unit Vacuum pump Note: To indoor unit Field pipings Connection procedure for gauge manifold and vacuum pump Caution Conduct an airtight test and vacuum drying precisely through the service ports of both liquid and gas shutoff valves. Use charge hoses (provided with a pushing rod each) when using the service ports. In case of possible water intrusion into piping Perform the above mentioned vacuum drying for 2 hours first in the following cases: The product is installed in the rainy season, there is a fear of dew condensation resulting in the piping because the installation work period is long, or there is a fear of rainwater intrusion into the piping for other reasons. Then impose a pressure of up to 0.05 MPa with nitrogen gas (for vacuum destruction) and vacuum the unit down to –100.7 kPa or below for 1 hour with a vacuum pump (for vacuum drying). Repeat vacuum destruction and vacuum drying if the pressure does not reach –100.7 kPa or below after a minimum of 2 hours’ vacuuming. Leave the vacuum state for 1 hour then, and check that the vacuum gauge reading will not rise. 5.3.2 Thermal Insulation Work Be sure to perform thermal insulation of the piping after the airtight test and vacuum drying. Be sure to perform the thermal insulation of the liquid and gas pipes in the connecting piping. Otherwise, water leakage may result. Be sure to insulate liquid and gas connection piping. Failure to do so may result in water leakage. Consult the following chart as a general guide when selecting the insulation thickness. Liquid pipe arrival minimum temperature –10°C Gas pipe arrival minimum temperature –20°C (MT (Medium Temperature)) –40°C (LT (Low Temperature)) Reinforce the insulation material for the refrigerant piping according to the environment of thermal installation. Otherwise, the surface of the insulation material may result in dew condensation. If the dew condensation water on the shutoff valves is likely to flow to the indoor unit side through the clearance between the insulation material and piping because the outdoor unit is installed above the indoor unit or for some other reasons, perform appropriate treatment such as the caulking of the joints (see the illustrations below). Attach the cover of the piping outlet with a knock hole opened. If there is a feature of small animals intruding through the piping outlet, cover the piping outlet with a blocking material (field supply) on completion of the steps of “5.5 Additional Refrigerant Charge” (see the illustrations below). Use the piping outlet for jobs required during the steps of “5.5 Additional Refrigerant Charge” (e.g., a job of taking in the charge hose). Air Cooled Refrigeration Condensing Unit 67 Test Operation SiENBE28-901 Liquid side shutoff valve Gas side shutoff valve Coking, etc. Indoor/Outdoor interunit piping Insulation material Piping lead-out hole lid Block Liquid side piping Open a knock hole at Gas side piping Note: After knocking out the holes, we recommend you remove burrs in the knock holes and paint the edges and areas around the edges using the repair paint. 5.3.3 Checking of Device and Installation Conditions Be sure to check the followings. <For those doing electrical work> 1. Make sure there is no faulty power wiring or loosing of a nut. See “5.2.1 Procedure for Power Supply Wiring”. 2. Has the insulation of the main power circuit deteriorated? Measure the insulation and check the insulation is above regular value in accordance with relevant local and national regulations. <For those doing pipe work> 1. Make sure piping size is correct. See “5.1.2 Selection of Piping Material”. 2. Make sure insulation work is done. See “5.3.2 Thermal Insulation Work”. 3. Make sure there is no faulty refrigerant piping. See “5.1. REFRIGERANT PIPING”. 68 Air Cooled Refrigeration Condensing Unit SiENBE28-901 5.4 Test Operation Checks after Work Completion Make sure the following works are complete in accordance with the installation manual. • Piping work • Wiring work • Air tight test/Vacuum drying • Installation work for indoor unit 5.5 Additional Refrigerant Charge For refrigerant filling contractor Use R410A for refrigerant replenishment. The R410A refrigerant cylinder is painted with a pink belt. Warning Electric Shock Warning Securely close the control box lid before turning power on. Before turning power on, check through the inspection hole (on the left-hand side) of the control box lid that the RUN switch is set to OFF. If the RUN switch is set to ON, the fan may rotate. Check the LED indicators on the PCB (A1P) of the outdoor unit through the inspection hole (on the right-hand side) of the control box lid after the outdoor unit is turned on (see the illustration). (The compressor will not operate for approximately 2 minutes after the outdoor unit is turned on. H2P blinks for the first five seconds when the power supply is turned on. If the equipment is normal, H2P will be turned off in five seconds. H2P lights for abnormality.) Inspection hole (right-hand side) (upper right-hand side of control box) Control box lid Lift up this tab and open the cover. LED (H1~8P) Inspection hole cover Inspection hole (left-hand side) Control box Inspection hole (right-hand side) RUN switch (factory set: OFF) REMOTE OFF ON Inspection hole (left-hand side) (upper left-hand side of control box) Warning Use protective gear (e.g., protective gloves and glasses) at the time of refrigerant filling. Pay attention to the rotation of the fan whenever the front panel is opened while working. The fan can rotate continuously for a while after the outdoor unit stops operating. Air Cooled Refrigeration Condensing Unit 69 Test Operation SiENBE28-901 [Additional Refrigerant Charge] Caution Refer to the Operation Method of Shutoff Valves for the control method of the shutoff valves. Never charge liquid refrigerant directly from a gas line. Liquid compression may cause the compressor to fail. 1. The refrigerant must be noted for this product. Calculate the amount of additional refrigerant charge according to the label for the calculation of the amount of additional refrigerant charge. 2. Take the following procedure for additional refrigerant charge. Refer to “5.3.1 Airtight Test/Vacuum Drying” for the connection of the refrigerant cylinder. (1) Turn on the indoor unit and control panel. Do not turn on the outdoor unit. (2) Charge additional refrigerant from the service port of the shutoff valve on the liquid side. (3) If the calculated amount of refrigerant cannot be filled, take the following steps to operate the system and continue additional refrigerant charge. a. Open the gas shutoff valve all the way and adjust the opening of the liquid shutoff valve (*1). b. [Warning/Electric Shock Warning] Turn on the outdoor unit. c. [Warning/Electric Shock Warning] Turn on the RUN switch of the outdoor unit and replenish refrigerant while the outdoor unit is in operation. d. Turn off the RUN switch of the outdoor unit after the specified amount of refrigerant is replenished. e. [Caution] Fully open the shutoff valves on the gas and liquid sides promptly. Otherwise, a piping explosion may result from liquid sealing. Control box Label of instructions on additional refrigerant charge Label pasting position *1 The cylinder’s internal pressure will drop when there is little refrigerant remaining in the cylinder, making it impossible to charge the unit, even if the liquid shutoff valve opening is adjusted. In this situation, replace the cylinder with one that has more refrigerant remaining. Additionally, if the piping length is long, additional charging while the liquid shutoff valve is fully closed may lead to activation of the protection system, causing the unit to stop operation. 1. After the work is completed, apply a screw lock agent (for flare nuts) to the screws of the shutoff valves and service ports. 2. After the additional refrigerant charge is completed, fill out the item “total amount of additional refrigerant charge” on the label of instructions on additional refrigerant charge of the outdoor unit with the actual amount of additional refrigerant charge. Refer to the illustration of the label pasting position for instructions on additional refrigerant charge (see the illustration on the above). 70 Air Cooled Refrigeration Condensing Unit SiENBE28-901 Test Operation [Precautions for refrigerant cylinder] At the time of refrigerant filling, check whether the siphon tube is provided. Then locate the cylinder so that the refrigerant will be filled in the state of liquid (see table below). R410A is a mixed refrigerant, the composition of which may change and the normal operation of the system may not be possible if the refrigerant is filled in the state of gas. Cylinder provided with siphon tube. Stand the cylinder upright and fill the refrigerant. (There is a siphon tube inside, which makes it possible to replenish the refrigerant in the state of liquid without setting the cylinder upside down.) Other cylinders Stand the cylinder upside down and fill the refrigerant. (Pay attention so that the cylinder will not topple down.) [Check through sight glass] Full of liquid A little foam flows. Sealing state Caution 5.6 Foam always comes out. Sight glass Refrigerant insufficiency Fully open the shutoff valves on the liquid and gas sides after the additional refrigerant charge is finished. The compressor will malfunction if the system is operated with the shutoff valves closed. Apply a screw lock agent to the screws of the valve cover mounting parts and service ports. (Otherwise, dew condensation water will intrude and freeze inside and cause cap deformation or damage, which may result in refrigerant gas leakage or compressor malfunctions.) Test Run For test run operators Do not operate the outdoor unit alone on a trial basis. Test run procedure Use the following procedure to perform a test run after installation work is complete for the entire system: 1. Fully open the shutoff valves on the gas and liquid sides of the outdoor unit. 2. Set the RUN switch of the outdoor switch to ON. Note: Before turning power on, check that the piping cover and control box lid of the outdoor unit are closed. 3. Check the sealing condition of the outdoor unit through the sight glass. Make sure that the amount of refrigerant is sufficient. 4. Make sure that cold air blows from the indoor unit. Check that the internal temperature is dropping. (Check that the temperature will drop and reach the set temperature in the internal unit. It will take approximately 40 minutes for the interior temperature of the internal unit to reach –20°C.) Check that the indoor unit (for refrigeration or freezing) goes into defrosting operation. 5. Turn power off with the RUN switch of the outdoor unit set to OFF. (Stopping unit operation by disconnecting the power supply directly is dangerous. When the unit is stopped in this manner, its power outage compensation function may cause it to resume operation as soon as the power supply is reactivated. Additionally, stopping the unit in this manner may cause the compressor to fail). Air Cooled Refrigeration Condensing Unit 71 Test Operation SiENBE28-901 Error diagnosis If the system cannot operate normal at the time of test run (i.e., the H2P indicator is lit), check with malfunction code on the system with the pushbutton switches on the PCB of the outdoor unit, and take the following steps. Make checks on other malfunction codes and pushbutton switches by referring to the provided Technical Guide. LED indication (BS3 switch pressed once) (BS2 switch pressed once) Installation failure Remedy H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H7P l h k h h l l k h h l l h h or h l k l h h l The shutoff valves were left closed. Fully open the shutoff valves. l h k h l l l l k h h l h h The passage of air is blocked. Remove obstacles that block the passage of air. l h k l h h l l k h h h h l Reverse-phase wiring of power supply Exchange two wires out of the three power supply wires. l h k l h h l l k h h h l h Voltage drop Make a voltage drop check. Electric leak See *1 below. Open L2 phase Verify power supply wiring connections. l h k h l l l l k h l h h l l h k h h l l l k h h h l h l h k h l l l l k h l l h h l h k h l h h l k h h h l l Normal monitor (HAP) LED off. Open L1 phase h OFF k ON l BLINK *1 Set the operating switch to the “OFF” position to reset the power supply and then return the switch to the “ON” position to restart the unit. If the problem persists, refer to the Service Manual. Caution 72 Do not disconnect the power supply for 1 minute after setting the operating switch to “ON”. Electric leak detection is performed for several seconds after the operating switch is set to “ON” and each compressor starts operating, so disconnecting the power supply during that time will result in a false detection. Air Cooled Refrigeration Condensing Unit SiENBE28-901 Troubleshooting 6. Troubleshooting 6.1 Checking Points at Servicing Symptoms and check points Symptoms Temperature inside the showcase is at abnormal level. Check points Is the outdoor unit running? Is the sight glass liquid-sealed (in cooling)? Is the showcase's fan running? Is the showcase's solenoid valve operating properly? Is the showcase's thermostatic expansion valve operating properly? (No broken capillaries?) Is the defrost operation conducted properly? (No excessive frosting?) Is the outdoor unit heat exchanger blocked with dust or the like? Is the air curtain blocked at the air outlet or inlet of showcase? Equipment does Check to be sure the malfunction code not run. on the remote controller. Check to be sure the malfunction LED display on the outdoor unit PCB. Countermeasure and check details Check the operation switch, signal line R1·R2 and malfunction display. Charge refrigerant. Check the disconnection, and malfunction. (in the showcase) Rectify the solenoid valve. Check the state of mounting the body and feeler bulb. Actuate the forced defrosting. Check the defrosting cycle and the disconnection in the heater. Clean the heat exchanger. Remove the obstacles. Countermeasure to the malfunction code. Countermeasure to the malfunction LED display. The following symptoms are not malfunctions Symptoms Equipment does When the equipment is restart not operate. immediately after it stops. Immediately after power supply in turned ON. Sounds are produced. (Outdoor unit) A faint continuous hissing sound produced while in refrigerating operation. (Outdoor unit) A faint continuous hissing sound produced immediately after startup or stop of the unit. (Outdoor unit) An operating sound changes in the tone interval. The outdoor unit While in operation. fan does not run. Air Cooled Refrigeration Condensing Unit Causes The equipment is controlled in an affordable way. The equipment will automatically start running after a lapse of 1 to 5 min. The equipment is kept in standby mode until the micro-computer gets ready for operation. Wait for a period of approx. 2 min. This is a sound produced when gas (refrigerant) flows to the outdoor unit. This is a sound when gas (refrigerant) stops flowing or the flow is changed. This sound is produced through changing the compressor operating frequency. The fan speed is controlled in order to put the equipment into optimum operating conditions. 73 Troubleshooting SiENBE28-901 1. Guideline for right operating conditions. Item High pressure (MPa) Low pressure (MPa) Discharge pipe temperature (°C) Suction pipe temperature (°C) Measuring method Measure with a service checker or pressure gauge in a stable state 20 minutes or more after starting operation. Measure with a service checker or pressure gauge in a stable state 20 minutes or more after starting operation. Right range 2.1 - 2.7 MPa 0.0 MPa to target LPm + 0.05 MPa (Tc + 10) to 120°C Measure the temperature using a high pressure equivalent saturation surface thermometer or service checker. Tc: temperature (Te + 10) to 50°C Measure the temperature using a pressure equivalent saturation surface thermometer or service checker. Te: low temperature Operating conditions: outdoor temp.: 32°CD.B. Note that the values shown above may vary significantly, depending on the environment in which the unit is being used. 2. Emergency operation in the case of a compressor with poor electrical insulation (This only applies to a system with multiple compressors.) Usually, if a compressor stops because of a problem, the system will automatically perform a backup operation (i.e., emergency operation) using other, properly-functioning compressors. However, if the source breaker trips due to poor electrical insulation of a compressor, the whole system will shut down and no backup operation will be possible. If this happens, you need to run the other working compressors using the following procedures. 2-1. Procedure of emergency operation Operating the main circuit breaker twice makes it possible to conduct the forced backup operation. (i.e., to prohibit the operation of compressors having a failure in insulation and only to forcedly run operable compressors.) (Procedures) 1. Set the main circuit breaker of the outdoor unit to ON. Restarting operation will make automatic judgement on the insulation conditions of parts concerned again. ↓ "Malfunction judgement": The main circuit breaker will be set to OFF again. → "Normal judgement": The operation will be continued. 2. Set the main circuit breaker to ON again. (The forced backup operation will be initiated.) Precautions: The timing to turn OFF the circuit breaker varies with faulty parts. If the INV compressor has a failure in insulation, the circuit breaker will be immediately activated. However, if the STD compressor has a failure in insulation, it may take time to activate the circuit breaker due to loads applied. 74 Air Cooled Refrigeration Condensing Unit SiENBE28-901 Troubleshooting 2-2. Procedures to be taken after beginning emergency operation until compressor replacement is complete and normal operation resumes 1.Change the outdoor unit operation switch from "LOCAL" or "REMOTE" to "OFF". 2.Turn off the outdoor unit's main breaker. 3.Replace the defective compressor with a new one. 4.Turn the outdoor unit breaker back on. (*Make sure that the operation switch is set to "OFF" before turning on the main breaker.) 5.Change the outdoor unit operation switch from "OFF" to "LOCAL" or "REMOTE". 3. Contact our service department for details about the setting procedures for the AIRNET and service checker, and the precautions for use. 3-1. When using the AIRNET: Specify the outdoor unit AirNet address settings (Setting Mode 2-06). Specify the virtual indoor unit address settings (Setting Mode 2-16). (The settings described above are necessary even if you are not using the AIRNET, but are using an ST controller.) (Contact our service department when connecting a system to a VRV or other systems.) 3-2. When using a service checker: Specify the virtual indoor address settings (Setting Mode 2-16). Note: Be sure to stop the system operation (compressors) before running a test of the AIRNET or using a service checker. Air Cooled Refrigeration Condensing Unit 75 Troubleshooting 6.2 No. 1 2 3 SiENBE28-901 List of Malfunction Codes Item STD compressor OC activation Earth leakage Abnormal high pressure level Code (Remote control display) Detection device Criteria E0 Current sensor 14.95A • Leakage breaker • Earth leakage breaker activates within 20 seconds after compressor startup E2 E3 • Leakage detector PCB • Leakage detector PCB is activated when HP<3.6MPa • High pressure switch • 3.8MPa or more LRMEQ5, 6AY1 LRLEQ5, 6AY1 LRMEQ8, 10, 12AY1 LRLEQ8, 10, 12AY1 Level Malfunction output Output during backup Level Malfunction output Output during backup Level Malfunction output Output during backup 2 — — — Alarm — ON Alarm — ON Manual reset "Reset the power supply" or "Turn the operation switch ON to OFF" 0 Shutdown — ON Alarm — ON Alarm — ON Manual reset "Reset the power supply" or "Turn the operation switch ON to OFF" 0 Shutdown ON — Alarm — ON Alarm — ON 3 Shutdown ON — Alarm — ON Alarm — ON 5 — — — Shutdown ON — Alarm — ON 7 — — — — — — Shutdown ON — Times of retry LRMEQ15, 20AY1 LRLEQ15, 20AY1 Remarks Manual reset "Reset the power supply" or "Turn the operation switch ON to OFF" • High pressure sensor • 3.55MPa or more SW5 is OFF • 0MPa or less (MT) • -0.015MPa or less (LT) 4 Shutdown ON — Shutdown ON — Shutdown ON — Manual reset "Reset the power supply" or "Turn the operation switch ON to OFF" Refer to P.56 "(10) Low pressure protection control". 4 Abnormal low pressure level E4 Low pressure sensor 5 INV compressor lock E5 Inverter PCB Position signal error 4 Shutdown ON — Alarm — ON Alarm — ON Manual reset "Reset the power supply" or "Turn the operation switch ON to OFF" 6 Outdoor fan motor malfunction E7 Fan driver PCB Irregular fan motor revolution 4 Shutdown ON — Alarm — ON Alarm — ON Manual reset "Reset the power supply" or "Turn the operation switch ON to OFF" 7 Electronic expansion valve malfunction E9 Main PCB No continuity of electronic expansion valve coil 0 Shutdown ON — Shutdown ON — Shutdown ON — Manual reset "Reset the power supply" • Discharge pipe temp. >150°C 0 Shutdown ON — Alarm — ON Alarm — ON • Discharge pipe temp. >120°C continuously for 70 sec. or more • Discharge pipe temp. >125°C continuously for 30 sec. or more • Discharge pipe temp.>130°C 14 Shutdown ON — Alarm — ON Alarm — ON 3 Shutdown ON — Alarm — ON Alarm — ON 5 — — — Shutdown ON — Alarm — ON 7 — — — — — — Shutdown ON — 8 Abnormal discharge pipe temperature F3 Discharge pipe thermistor Discharge pipe temp. >110°C, and EV2_pls≥450 pls, and EV3_pls≥450 pls continuously for 60 sec. Manual reset "Reset the power supply" or "Turn the operation switch ON to OFF" 9 3-sensor malfunction H0 Outdoor air thermistor Suction pipe thermistor Discharge pipe thermistor Heat exchanger intermediate inlet thermistor Heat exchanger intermediate outlet thermistor High pressure sensor Low pressure sensor 10 High pressure switch failure H3 Main PCB No continuity of high pressure switch 0 Shutdown ON — Shutdown ON — Shutdown ON — Manual reset "Reset the power supply" or "Turn the operation switch ON to OFF" 11 INV malfunction L1 Inverter PCB Malfunction of IGBT or INV is defected four times in an hour 0 Shutdown ON — Shutdown ON — Shutdown ON — Manual reset "Reset the power supply" 12 Radiating fin temperature rise L4 Inverter PCB 94°C 9 Shutdown ON — Alarm — ON Alarm — ON Manual reset "Reset the power supply" or "Turn the operation switch ON to OFF" 13 INV compressor instantaneo us overcurrent L5 Inverter PCB 9 Shutdown ON — Alarm — ON Alarm — ON Manual reset "Reset the power supply" or "Turn the operation switch ON to OFF" 14 INV compressor overcurrent L8 Inverter PCB 9 Shutdown ON — Alarm — ON Alarm — ON Manual reset "Reset the power supply" or "Turn the operation switch ON to OFF" 15 Faulty INV compressor startup failure L9 Inverter PCB 2 Shutdown ON — Alarm — ON Alarm — ON Manual reset "Reset the power supply" or "Turn the operation switch ON to OFF" 16 Transmission failure between control PCB and inverter PCB LC Inverter PCB Alarm — ON Alarm — ON Alarm — ON Automatic reset 17 INV compressor power voltage imbalance P1 Inverter PCB Shutdown ON — Alarm — ON Alarm — ON Manual reset "Reset the power supply" or "Turn the operation switch ON to OFF" 18 Radiation fin thermistor P4 Inverter PCB Fin thermistor open circuit or short circuit No limit Alarm — ON Alarm — ON Alarm — ON Automatic reset 19 Reversed phase / Open phase U1 Main PCB Reversed phase or open phase 0 Shutdown ON — Shutdown ON — Shutdown ON — Manual reset "Reset the power supply" 20 INV compressor abnormal power voltage U2 Inverter PCB 9 Shutdown ON — Alarm — ON Alarm — ON Manual reset "Reset the power supply" or "Turn the operation switch ON to OFF" 76 When 3 or more sensors detect abnormality 0 Shutdown ON — Shutdown ON — Shutdown ON — Manual reset "Reset the power supply" or "Turn the operation switch ON to OFF" 16.1A or more Transmission failure between main PCB and inverter PCB No limit 9 Air Cooled Refrigeration Condensing Unit SiENBE28-901 6.3 Troubleshooting Checking Malfunction Codes by LED Lamps on PCB 1) Simple diagnosis by the LED error display In Setting Mode 1-11, the error status of each component can be checked by reading the blinking LED. [Steps] Operate the pushbuttons on the PCB (in Setting Mode 1) and malfunction codes will be displayed by LEDs. Follow the steps below to check your unit. 1. Press the MODE button (BS1). (Setting Mode 1 will be entered.) 2. Pressing the SET button (BS2) will go to item No.1 (see the list of output items). 3. Pressing the RETURN button (BS3) will display any error for item No.1 using the LED (Normal: OFF, Error: Blinking). 4. Pressing the MODE button (BS1) will go back to the initial state. Air Cooled Refrigeration Condensing Unit 77 Troubleshooting SiENBE28-901 2) In Setting Modes 1-14 and on, it is possible to use the LED to check the error and retry details, using the same steps as previously described (see the next page). NO Setting Large item BS1 BS2 BS3 BS4 BS5 MODE SET RETURN TEST RESET Middle item Small item Description 1 Setting Mode 1, No. 1 Reversed phase H7P blinks when reversed phase is detected. 2 Setting Mode 1, No. 1 INV earth leakage H6P blinks when INV earth leakage is detected. 3 Setting Mode 1, No. 1 4 Setting Mode 1, No. 1 5 Setting Mode 1, No. 2 6 Setting Mode 1, No. 2 7 System STD1 earth leakage H5P blinks when STD1 earth leakage is detected. STD2 earth leakage H4P blinks when STD2 earth leakage is detected. EV1 H7P blinks when EV1 error occurs. EV2 H6P blinks when EV2 error occurs. Setting Mode 1, No. 2 EV3 H5P blinks when EV3 error occurs. 8 Setting Mode 1, No. 3 HP H5P blinks when HP sensor error occurs. LP1 H7P blinks when LP1 sensor error occurs. EV Pressure sensor 9 Setting Mode 1, No. 3 10 Setting Mode 1, No. 4 Td1 H7P blinks when Td1 sensor error occurs. 11 Setting Mode 1, No. 4 Td2 H6P blinks when Td2 sensor error occurs. 12 Setting Mode 1, No. 4 Td3 H5P blinks when Td3 sensor error occurs. 13 Setting Mode 1, No. 4 Ti1 H4P blinks when Ti1 sensor error occurs. 14 Setting Mode 1, No. 5 Ta H7P blinks when Ta sensor error occurs. 15 Setting Mode 1, No. 5 Tg H6P blinks when Tg sensor error occurs. 16 Setting Mode 1, No. 5 TL H5P blinks when TL sensor error occurs. Temperature sensor 1 Temperature sensor 2 17 Setting Mode 1, No. 6 18 Setting Mode 1, No. 6 19 Setting Mode 1, No. 7 20 Setting Mode 1, No. 7 21 Setting Mode 1, No. 8 22 Setting Mode 1, No. 9 L1 H7P blinks when L1 error occurs. 23 Setting Mode 1, No. 9 L4 H6P blinks when L4 error occurs. 24 Setting Mode 1, No. 9 L5 H5P blinks when L5 error occurs. 25 Setting Mode 1, No. 9 L8 H4P blinks when L8 error occurs. 26 Setting Mode 1, No. 9 L9 H3P blinks when L9 error occurs. 27 Setting Mode 1, No. 10 E5 H7P blinks when E5 error occurs. 28 Setting Mode 1, No. 10 U2 H6P blinks when U2 error occurs. 29 Setting Mode 1, No. 10 P1 H5P blinks when P1 error occurs. 30 Setting Mode 1, No. 10 P2 H4P blinks when P2 error occurs. 31 Setting Mode 1, No. 11 E7 (FAN1) H7P blinks when E7 error occurs. 32 Setting Mode 1, No. 11 H7 (FAN1) H6P blinks when H7 error occurs. 33 Setting Mode 1, No. 11 34 Setting Mode 1, No. 11 35 Setting Mode 1, No. 14 36 Malfunction output Current sensor Protection device Transmission INV error 1 INV error 2 Malfunction of fan CT1 H7P blinks when CT1 sensor error occurs. CT2 H6P blinks when CT2 sensor error occurs. HPS H7P blinks when HPS is detected. HPSL H6P blinks when HPSL is detected. INV H7P blinks when INV transmission error occurs. E7 (FAN2) H7P blinks when E7 error occurs. H7 (FAN2) H6P blinks when H7 error occurs. Malfunction contents (latest) — 0~63 (6bit) (See the list of malfunction codes.) Setting Mode 1, No. 15 Malfunction contents (one before) — 0~63 (6bit) (See the list of malfunction codes.) 37 Setting Mode 1, No. 16 Malfunction contents (two before) — 0~63 (6bit) (See the list of malfunction codes.) 38 Setting Mode 1, No. 17 Software number display — 0~63 (6bit) HP — 0~63 (6bit) — 0~63 (6bit) 39 Setting Mode 1, No. 18 Malfunction output 40 Setting Mode 1, No. 19 Software version display 41 Setting Mode 1, No. 20 Retry description (latest) — 0~63 (6bit) (See the list of malfunction codes.) 42 Setting Mode 1, No. 21 Retry description (one before) — 0~63 (6bit) (See the list of malfunction codes.) 43 Setting Mode 1, No. 22 Retry description (two before) — 0~63 (6bit) (See the list of malfunction codes.) 78 Air Cooled Refrigeration Condensing Unit SiENBE28-901 6.4 Troubleshooting Checking Malfunction Codes of the Condensing Unit Operate the pushbuttons on the PCB and malfunction codes will be displayed by LEDs. Setting Modes: 1-14, 15, 16, 20, 21, 22 [Steps] 1. Make sure that the "H1P" LED is OFF. (If the LED is ON, press the MODE button (BS1) once.) 2. Press the MODE button (BS1) once to enter the "monitor mode". 3. Pressing the RETURN button (BS3) will display the first digit of a malfunction code by LED. 4. Pressing the SET button (BS2) will display the second digit of the malfunction code by LED. 5. Pressing the MODE button (BS1) will go back to the former state. BS1 BS2 BS3 BS4 BS5 MODE SET RETURN TEST RESET LED display (Pressing the BS3 switch once) (Pressing the BS2 switch once) H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H7P l l l l l h h h h h k k k k k h h h h h h l l l l l h h l l l l h h l l l l l l k k k k k h h h h h l h k l h h h l k h l h k l h h h l k h l h k l h h l l k h Air Cooled Refrigeration Condensing Unit Remote controller display Malfunction contents Page referred h h h h E0 STD Compressor Motor Overcurrent/ Lock P.84 h h h h h h h l l l l l h h l h l h l l E2 Earth Leakage P.86 E3 Actuation of High Pressure Switch P.88 E4 Actuation of Low Pressure Sensor P.90 E5 Inverter Compressor Motor Lock P.92 E7 Malfunction of Outdoor Unit Fan Motor P.94 P.97 l h h l E9 Malfunction of Electronic Expansion Valve Coil h h h h l h l h F3 Abnormal Discharge Pipe Temperature P.99 H0 Three-sensor Malfunction P.101 P.103 h h l l H3 Malfunction Related to High Pressure Switch h l h l h h l h l l l h H7 Abnormal Outdoor Fan Motor Signal P.104 H9 Malfunction of Outdoor Air Thermistor P.106 J2 Current Sensor Malfunction P.107 P.108 h h l l J3 Malfunction of Discharge Pipe Thermistor h l h l J5 Malfunction of Suction Pipe Thermistor P.108 P.108 P.108 l h h h J8 Malfunction of Heat Exchanger Intermediate Inlet Thermistor l h h l J9 Malfunction of Heat Exchanger Intermediate Outlet Thermistor l l h h l h l h h h h l JA Malfunction of High Pressure Sensor P.110 JC Malfunction of Low Pressure Sensor P.112 L1 Faulty Inverter PCB P.114 P.115 h l h h L4 Malfunction of Inverter Radiating Fin Temperature Rise h l h l L5 INV Compressor Instantaneous Overcurrent P.116 l l h h h h h l L8 INV Compressor Overload P.118 L9 Faulty INV Compressor Startup P.120 l l h h LC Malfunction of Transmission (between Inverter PCB and Main PCB) P.122 h h l h h h l l h h h h h h l l h l l h P1 Power Supply Voltage Imbalance P.124 P4 Faulty Radiation Fin Thermistor P.125 PJ Faulty of Capacity Setting U1 Reverse Phase / Open Phase P.126 U2 Abnormal Power Supply Voltage P.127 — 79 Troubleshooting 6.5 SiENBE28-901 Troubleshooting by RAM Monitor Using the RAM monitor makes it possible to check the following operating data. Use this monitor for troubleshooting. SP_No. Ver. Hp_code SP number Version of software (Used for updating the software for PCB) The comparison between HP_code and the model on the RAM Monitor screen is as follows. 1:5AY1, 2:6AY1, 3:8AY1, 4:10AY1, 5:12AY1, 6:15AY1, 7:20AY1 [Main] Operation_SW unit_driving OPERATION switch bits (OFF/ON:0/1) No need for checking because it is not used. [Mode] Mode Next_mode Before_mode Mode_complete Start_complete 80 Present mode of operation The following mode of operation The previous mode of operation Driving mode completion bits (OFF/ON:0/1) Start driving completion bits (OFF/ON:0/1) Air Cooled Refrigeration Condensing Unit SiENBE28-901 Troubleshooting [Sensor] Ta Td1 Td2 Td3 Ti Tce Tg1 TL HP LP CT1 CT2 Mark of paragraph of trouble repair Ta Td1 Td2 Td3 Ti Tce Tg TL HP LP — — Mark of electric wiring diagram chart R1T R31T R32T R33T R2T R3T R5T R6T S1NPH S1NPL A6P A7P Tcl — — Tcg — — Teg — — 52ci 52C1_[X5A] 52C2_[X6A] 20S1_[X9A] SV2_[X8A] SV3_[X15A] EV1 Mark of paragraph of trouble repair INV STD1 STD2 4 WAY VALVE SV2 SV3 EV1 Mark of electric wiring diagram chart M1C M2C M3C Y3S Y2S Y5S Y1E EV2 EV2 Y2E EV3 Ftc INV_Hz Fansp Fan1 Fan2 EV3 — — — — — Y3E — — — M1F M2F TotalHz — — R1 — OPERATING OUTPUT Mark on RAM Monitor Meaning Ambient temperature thermistor Discharge temperature thermistor (INV Comp) Discharge temperature thermistor (STD1) Discharge temperature thermistor (STD2) Suction temperature thermistor Outdoor heat exchanger outlet thermistor Subcool heat exchanger outlet thermistor Subcool heat exchanger inlet thermistor High pressure sensor Low pressure sensor Current sensor (STD1) Current sensor (STD2) Liquid side condensation pressure equivalent saturation temperature (calculation value) Gas side condensation pressure equivalent saturation temperature (calculation value) Gas side evaporation pressure equivalent saturation temperature (calculation value) [Actuator] Mark on RAM Monitor Air Cooled Refrigeration Condensing Unit Meaning INV compressor driven bits(OFF/ON:0/1) STD1 compressor driven bits(OFF/ON:0/1) STD2 compressor driven bits (OFF/ON:0/1) Solenoid valve (4 way valve ) bits (OFF/ON:0/1) Solenoid valve (STD1) bits(OFF/ON:0/1) Solenoid valve(STD2) bits (OFF/ON:0/1) Electric expansion valve(main) pulse(0~480) Electric expansion valve(Economizer) pulse(0~480) Electric expansion valve(INV) pulse(0~480) INV step INV Hz Fan step Fan rotation Fan rotation Total compressor Hz(STD is calculated as 166Hz) Operating output(For liquid solenoid valve control of showcase) bits (OFF/ON:0/1) 81 Troubleshooting SiENBE28-901 [Data] Mark on RAM Monitor SH TdSH1 TdSH2 TdSH3 Lpm Lpm1 ΔTm_ho Meaning (Calculation value from sensor) Suction super heat Discharge super heat(INV) Discharge super heat(STD1) Discharge super heat(STD1) Target evaporation temperature equivalent pressure (Lpm is saturation temperature equivalent pressure of Tst. Tst=f(Lpm)=Tsd+ΔTsp+ΔTsn=f(Lpm1)+f(ΔTm)+ΔTsn Target evaporation temperature equivalent pressure (Lpm1 is saturation temperature equivalent pressure of Tsd.) ΔTm is an equivalent saturation pressure value of ΔTsp. [Amp/Fin] Mark on RAM Monitor Inv_1_Amp Inv_2_Amp Fin_Temp Fan1_1_Amp Fan1_2_Amp Fan2_1_Amp Fan2_2_Amp Meaning The first inverter current The second inverter current Temperature of INV fin The first fan1 current The second fan1 current The first fan2 current The second fan2 current [Irregular stop] Mark on RAM Monitor Irregular stop Inv_Abnomal_fixation STD1_Abnomal_fixation STD2_Abnomal_fixation FAN1_Abnomal_fixation FAN2_Abnomal_fixation 82 Meaning Irregular stop bits (Normality/abnormality:0/1) Inverter compressor abnormality and fixation bits(Normality/abnormality:0/1) STD1 compressor abnormality and fixation bits(Normality/abnormality:0/1) STD2 compressor abnormality and fixation bits(Normality/abnormality:0/1) FAN1 compressor abnormality and fixation bits(Normality/abnormality:0/1) FAN2 compressor abnormality and fixation bits(Normality/abnormality:0/1) Air Cooled Refrigeration Condensing Unit SiENBE28-901 Troubleshooting [Retry] Mark on RAM Monitor Error code F0 F3 F1 F3 F2 F3 F3 F3 F4 F5 F6 E3 E4 E6 F7 E0 F8 E0 F9 F10 F11 E5 L9 L8 F12 L5 F13 U2 F14 L4 F17 F21 P1 E7 F22 F24 F25 H7 E7 H7 Meaning Frequency of retrying of Abnormal Discharge Temperature(system) Frequency of retrying of Abnormal Discharge Temperature(INV) Frequency of retrying of Abnormal Discharge Temperature(STD1) Frequency of retrying of Abnormal Discharge Temperature(STD2) Frequency of retrying of Actuation of High Pressure Sensor Frequency of retrying of Actuation of High Pressure Sensor Frequency of retrying of Actuation of High HPSL Frequency of retrying of STD1 Compressor Motor Overcurrent/Lock Frequency of retrying of STD2 Compressor Motor Overcurrent/Lock Frequency of retrying of Inverter Compressor Motor Lock Frequency of retrying of Faulty INV Compressor Startup Frequency of retrying of Inverter Compressor Overload Frequency of retrying of Inverter Compressor instantaneous Overcurrent Frequency of retrying of Abnormal Power Supply Voltage Frequency of retrying of Malfunction of Inverter Radiating Fin Temperature Rise Frequency of retrying of Power Supply Voltage Imbalance Frequency of retrying of Malfunction of Outdoor Unit Fan1 Motor Frequency of retrying of Abnormal Outdoor Unit Fan1 Motor Signal Frequency of retrying of Malfunction of Outdoor Unit Fan2 Motor Frequency of retrying of Abnormal Outdoor Unit Fan2 Motor Signal [Abnormal_code] Mark on RAM Monitor Meaning Abnormal_code It depends on the table below Abnormal code on service manual E0 E1 E2 E3 E4 E5 E7 E9 F3 H0 Display on Ram monitor screen 30 31 32 33 34 35 37 39 53 40 Abnormal code on service manual H3 H7 H9 J2 J3 J5 J8 J9 JA JC Display on Ram monitor screen 43 47 49 62 63 65 68 69 6A 6C Abnormal code on service manual L1 L4 L5 L8 L9 LC P1 P4 PJ U1 U2 Display on Ram monitor screen 71 74 75 78 79 7C 81 84 8D 91 92 [State] Mark on RAM Monitor Meaning State1 Normal when 5 or 9 is display State2 Normal when 17 is display Ignore the number since it is not clear which number will be displayed Air Cooled Refrigeration Condensing Unit 83 Troubleshooting 6.6 SiENBE28-901 Flow Chart for Troubleshooting 6.6.1 “E0” STD Compressor Motor Overcurrent/Lock Remote Controller Display E0 Applicable Models LRMEQ8~20AY1 LRLEQ8~20AY1 Method of Malfunction Detection Detects the overcurrent with current sensor (CT). Malfunction Decision Conditions Malfunction is decided when the detected current value exceeds 14.95A for 2 seconds. Supposed Causes 84 Closed stop value Obstacles at the air outlet Improper power voltage Faulty magnetic switch Faulty compressor Faulty current sensor (A6P, A7P) Defect of outdoor unit PCB (A1P) Air Cooled Refrigeration Condensing Unit SiENBE28-901 Troubleshooting Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. Is the stop valve open? NO Open the stop valve. YES Obstacle exists around the air outlet. NO YES Is the power supply voltage normal? YES NO Is the magnetic switch (K2M, K3M) normal? (∗1) YES NO Remove the obstacle. Correct the power voltage. Replace the magnetic switch. Check the wiring from power supply ~ current sensor (A6P, A7P) ~ MgS (K2M, K3M) ~ compressor Is above wiring correct? NO Correct wiring. YES Is current sensor correct? ∗1 YES NO Replace the corresponding current sensor (A6P or A7P). Retry Replace the outdoor unit PCB (A1P). Replace the compressor. Note: ∗1 One of the possible factors may be chattering due to rough MgS contact. ∗2 Abnormal case The current sensor value is 0 during STD compressor operation. The current sensor value is more than 14.95A during STD compressor stop. Air Cooled Refrigeration Condensing Unit 85 Troubleshooting SiENBE28-901 6.6.2 “E2” Earth Leakage Remote Controller Display E2 Applicable Models LRMEQ5~20AY1 LRLEQ5~20AY1 Method of Malfunction Detection When there is a earth leakage (breaker ON/OFF) Time elapsed after power-on When there is a earth leakage (leakage detector PCB) The continuity of the high pressure switch is checked using the protective device circuit. Malfunction Decision Conditions When there is a earth leakage (breaker ON/OFF) Within 10 seconds after the power is turned on When there is a earth leakage (leakage detector PCB) If the high-pressure switch is activated but the pressure is not very high Supposed Causes 86 Compressor (or the complete product) has defective insulation. High pressure switch connection failure Faulty leakage detector PCB No continuity in high pressure switch Temporary liquid return or refrigerant slugging Power failure during operation Prolonged power shut down Within 10 seconds after the power is turned on Air Cooled Refrigeration Condensing Unit SiENBE28-901 Troubleshooting Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. More than 10 seconds passed since power-on NO YES Reset the power with the operation switch set to OFF. Earth leakage (breaker ON/ OFF): E2 Shut off power. Remove the compressor lead wire. YES No defective insulation on compressor NO Replace the defective parts. Earth leakage (leakage detector PCB): E2 YES No defective insulation on entire product NO Replace the defective parts. Earth leakage (leakage detector PCB): E2 YES High pressure switch is properly connected. NO Correct connection. YES Leakage detector PCB fuse is not blown. NO Replace the leakage detector PCB. YES Recover all wiring. Turn on the power. Leakage detector PCB is energized. NO Replace the leakage detector PCB. YES High pressure switch is energized at both ends. NO Replace the high pressure switch. YES It is likely that earth leakage occurred due to temporary liquid return or refrigerant slugging. Earth leakage is possible in the event of power failure during operation or prolonged power shutoff. Air Cooled Refrigeration Condensing Unit 87 Troubleshooting SiENBE28-901 6.6.3 “E3” Actuation of High Pressure Switch Remote Controller Display E3 Applicable Models LRMEQ5~20AY1 LRLEQ5~20AY1 Method of Malfunction Detection The protection device circuit checks continuity in the high pressure switch. Malfunction Decision Conditions Error is generated when the HPS activation count reaches the number specific to the operation mode. (Reference) Operating pressure of high pressure switch Operating pressure: 3.8MPa Reset pressure: 2.85MPa Supposed Causes 88 Actuation of outdoor unit high pressure switch Defect of high pressure switch Defect of outdoor unit main PCB (A1P) Instantaneous power failure Faulty high pressure sensor Air Cooled Refrigeration Condensing Unit SiENBE28-901 Troubleshooting Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. Check for the points shown below. (1)Is the stop valve open? (2)Is the HPS connector properly connected to the main PCB? (3)Does the high pressure switch have continuity? Are the three points above OK? NO Rectify the defective points, if any. YES (1)Mount a pressure gauge on the high pressure service port. (2)Reset the operation with power breaker or operation switch and then restart the operation. Does the stop due to malfunction (E3) recur? NO YES Are the characteristics of the high pressure sensor normal? (See ∗1.) Is the HPS operating value normal (i.e., 3.8MPa)? NO Replace the HPS. YES NO Replace the high pressure sensor. YES Service Checker Connect the service checker to compare the “high pressure” value and the actual measurement value by pressure sensor (Refer to ∗1) by using the service checker. Check if the “high pressure” value and the actual measurement value by pressure sensor are the same. NO Replace the main PCB (A1P). YES · The high pressure sensor is normal, and the pressure detected with the PCB is also normal. · The high pressure has really become high. Referring to information on P134, remove the causes by CHECK 5 which the high pressure has become high. ∗1:Make a comparison between the voltage of the pressure sensor and that read by the pressure gauge. ∗2:Make measurement of voltage of the pressure sensor. +5V Connector for high pressure sensor (Red) (4) Red (3) Black High pressure sensor (2) Micro-controller A/D input (1) White Make measurement of DC voltage between these wires. Air Cooled Refrigeration Condensing Unit 89 Troubleshooting SiENBE28-901 6.6.4 “E4” Actuation of Low Pressure Sensor Remote Controller Display E4 Applicable Models LRMEQ5~20AY1 LRLEQ5~20AY1 Method of Malfunction Detection Abnormality is detected by the pressure value with the low pressure sensor. Malfunction Decision Conditions Error is generated when the low pressure is dropped under compressor operation. Low pressure <0.00MPa Detected within 3 hours after power-on Supposed Causes 90 Abnormal drop of low pressure Defect of low pressure sensor Defect of outdoor unit PCB Stop valve is not opened Shortage of gas Moisture choke Air Cooled Refrigeration Condensing Unit SiENBE28-901 Troubleshooting Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. NO Is the stop valve open? Open the stop valve. YES (1)Mount a pressure gauge on the low pressure service port. (2)Reset the operation and then restart the operation. Are the characteristics of the low pressure sensor normal? (See ∗1.) NO Replace the low pressure sensor. YES Service Checker Connect the service checker to compare the “low pressure” value and the actual measurement value by pressure sensor (Refer to ∗1) by using the service checker. Check if the “low pressure” value and the actual measurement value by pressure sensor are the same. NO Replace the main PCB (A1P). YES · The low pressure sensor is normal, and the pressure detected with the PCB is also normal. · The low pressure has really become low. CHECK 6 Referring to information on P135, remove the causes by which the low pressure has become low. ∗1:Make a comparison between the voltage of the pressure sensor and that read by the pressure gauge. ∗2:Make measurement of voltage of the pressure sensor. +5V Connector for low pressure sensor (Blue) Micro-controller A/D input (4) Red (3) Black (2) White Low pressure sensor (1) Make measurement of DC voltage between these wires. Checking for clog To check for the presence of clog, measure the pipe temperatures at the locations before and after the check point. (1) Electronic expansion valve (2) Secondary equipment filter (3) Dryer (4) Outdoor unit filter Air Cooled Refrigeration Condensing Unit 91 Troubleshooting SiENBE28-901 6.6.5 “E5” Inverter Compressor Motor Lock Remote Controller Display E5 Applicable Models LRMEQ5~20AY1 LRLEQ5~20AY1 Method of Malfunction Detection Inverter PCB takes the position signal from UVW line connected between the inverter and compressor, and the malfunction is detected when any abnormality is observed in the phasecurrent waveform. Malfunction Decision Conditions This malfunction will be output when the inverter compressor motor does not start up even in forced startup mode. Supposed Causes 92 Inverter compressor lock High differential pressure (0.5MPa or more) Incorrect UVW wiring Faulty inverter PCB Stop valve is left in closed Slugging state of refrigerant Abrasion of sliding parts caused by wet operation due to faulty secondary equipment expansion valve Failure of oil return due to faulty onsite piping work Liquid return caused by operation signal connection failure Air Cooled Refrigeration Condensing Unit SiENBE28-901 Troubleshooting Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. Check if the stop valve is open. NO Local factor Open the stop valve. YES Check if the relay wires to the compressor are correct. YES NO Check if the connection of UVW phase order is correct. YES NO Replace the connecting wires and ensure right connection of the connector. Ensure correct connection. W U Power OFF Check if the wiring is the same as in the electric wiring diagram. YES The insulation resistance of the compressor is low (not more than 100kΩ). NO Check if the wiring has any error in mistake for inverter compressor. YES V Ensure correct connection. Replace the compressor. NO The compressor coil has disconnection of wires. NO YES Restart and check the operation. Check if the condition occurs again. NO YES Conclude the work There is a possibility of defect of pressure equalizing. Check the refrigerant circuit. Power ON Check if the start mode is in the high differential pressure (not less than 0.5 MPa). NO YES Defect of pressure equalizing Check the refrigerant circuit. Replace the INV compressor. ∗1: Pressure difference between high pressure and low pressure before starting. Air Cooled Refrigeration Condensing Unit 93 Troubleshooting SiENBE28-901 6.6.6 “E7” Malfunction of Outdoor Unit Fan Motor Remote Controller Display E7 Applicable Models LRMEQ5~20AY1 LRLEQ5~20AY1 Method of Malfunction Detection While the fan motor is in operation, detect the malfunction related to the fan motor according to revolutions detected with the hall sensor IC. Malfunction Decision Conditions The fan revolutions are kept at less than a certain value for a period of not less than 6 seconds when the fan motor meets rotating conditions. The revolutions detection connector is disconnected. When the malfunction occurs 4 times, an alarm will be output. When it occurs 5 times, the system will go down. Supposed Causes 94 Failure of fan motor Defect or connection error of the connectors / harness between the fan motor and PCB The fan can not rotate due to any foreign substances entangled Clear condition: Continue normal operation for 10 minutes Air Cooled Refrigeration Condensing Unit SiENBE28-901 Troubleshooting Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. LRL(M)EQ15A, 20AY1 have 2 fans. Cut the power supply OFF and wait for 10 minutes. YES Check if any foreign substances around the fan. NO Remove the foreign substances. Check connectors for their connections { For fan motor 1: Relay connectors X1A and X2A or connectors of compressor inverter PCB X1A and X2A { For fan motor 2: Relay connectors X3A and X4A or connectors of fan inverter PCB X1A and X2A Check if any connector is disconnected. YES Insert the connector. NO Check the relay connectors for their color { For fan motor 1: White for all power supply and signal cables { For fan motor 2: Red on the PCB side and white on the motor side for all power supply and signal cables Relay connectors have any connection error. YES Correct the connection of the relay connectors. NO A LRMEQ05~12AY1 LRLEQ05~12AY1 A4P N1 X5A F1U R10 + X4A V1R X3A X2A X1A Z5C N=1 X1A RED WHT BLK X2A Air Cooled Refrigeration Condensing Unit X3A X1A Z5C N=1 5 MS 3~ 5 M1F A8P P1 P2 N1 X5A P1 N2 X51A F1U R10 + X4A V1R X2A 5 N1 X5A X3A F1U R10 + X4A V1R X2A X1A Z9C N=1 5 RED X1A RED WHT BLK P1 MS 3~ 5 M1F X2A X3A WHT RED RED X4A RED WHT BLK A4P LRMEQ15, 20AY1 LRLEQ15, 20AY1 WHT MS 3~ 5 M2F 95 Troubleshooting SiENBE28-901 Troubleshooting A No continuity of fuse (FIU) on the fan inverter PCB. YES Replace fan inverter PCB. NO Unable to rotate the fan manually with ease when removing the connector of the fan motor. YES Replace the corresponding fan motor. NO Resistance value between the power supply wire terminal of fan motor and the motor frame (metal) is 1MΩ and below. YES Replace the corresponding fan motor. NO Check fan motor connector (power supply wire) The resistance value between UVW phases of fan motor is out of balance, or short circuit between UVW phases. YES Replace the corresponding fan motor. NO Check fan motor connector (signal wire) The signal wire short circuits between Vcc and GND and between UVW and GND. YES Replace the corresponding fan motor. NO Put the power supply ON to check the following LED lamps. 1) HAP lamp on the compressor PCB (A3P) 2) HAP lamp on the fan inverter PCB (A4P) HAP lamp for the A4P does not blink on the condition that HAP lamp for A3P is blinking. YES Replace the fan inverter PCB. NO Replace the fan motor 2. 96 Air Cooled Refrigeration Condensing Unit SiENBE28-901 Troubleshooting 6.6.7 “E9” Malfunction of Electronic Expansion Valve Coil Remote Controller Display E9 Applicable Models LRMEQ5~20AY1 LRLEQ5~20AY1 Method of Malfunction Detection To be detected based on continuity existence of coil of electronic expansion valve (Y1E) Malfunction Decision Conditions No current is detected in the common (COM [+]) when power supply is ON. Supposed Causes Disconnection of connectors for electronic expansion valve (Y1E, Y2E, Y3E) Defect of electronic expansion valve coil Defect of outdoor unit main PCB (A1P) Air Cooled Refrigeration Condensing Unit 97 Troubleshooting SiENBE28-901 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. Caution Turn power supply off, and turn power supply on again. YES Return to normal? NO The connector of outdoor unit PCB (A1P) for electronic expansion valve is connected. NO External factor other than malfunction (for example, noise etc.). Ensure correct connection. YES The coil resistance of electronic expansion valve is normal. (Refer to ∗1) NO Replace the electronic expansion valve coil. YES Replace outdoor unit PCB (A1P). ∗ Make measurement of resistance between the connector pins, and then make sure the resistance falls in the range of 40 to 50Ω. (Orange) 1 (Red) 2 Measuring points (Yellow) 3 (Black) 4 5 Judgment criteria 1-6 2-6 3-6 40~50Ω 4-6 COM[+] (Gray) 6 98 Air Cooled Refrigeration Condensing Unit SiENBE28-901 Troubleshooting 6.6.8 “F3” Abnormal Discharge Pipe Temperature Remote Controller Display F3 Applicable Models LRMEQ5~20AY1 LRLEQ5~20AY1 Method of Malfunction Detection Abnormality is detected according to the temperature detected by the discharge pipe temperature sensor. Malfunction Decision Conditions When the discharge pipe temperature rises to an abnormally high level. Supposed Causes or Discharge pipe temp. >120°C continuously for 70 sec. or more Discharge pipe temp. >125°C continuously for 30 sec. or more Discharge pipe temp. >130°C & Discharge pipe temp. >110°C EV2 · pls≥450 pls EV3 · pls≥450 pls continuously for 60 sec. Faulty discharge pipe temperature sensor Faulty discharge pipe temperature thermistor Faulty outdoor unit PCB Insufficient injection at intermediate heat exchanger outlet caused by flash gas due to gas leakage or insufficient volume of refrigerant. Clogging of electronic expansion valve for injection Failure to open the maintenance valve Insufficient insulation of onsite suction pipe Air Cooled Refrigeration Condensing Unit 99 Troubleshooting SiENBE28-901 Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. Connect the service checker. Press reset and start operation again. Is the refrigerant amount proper? NO YES Check the refrigerant piping line for clogging. NO Recover the refrigerant. Conduct vacuum drying, and then charge a proper amount of refrigerant. Rectify the clogging. YES Connect the service checker, and the restart the system. Check if discharge pipe thermistor property is normal. (∗1) NO Replace the discharge pipe thermistor. YES Service Checker Connect the service checker to compare the temperature of discharge pipe by using service checker with actual measurement value of discharge pipe thermistor (Refer to ∗1). Check if temperature of discharge pipe by using service checker is the same with actual measurement value of discharge pipe thermistor. NO Replace the main PCB (A1P). YES · Discharge pipe thermistor is normal and the temperature detection of the main PCB is also normal. · Actually the temperature of discharge pipe is high. Check 3 Remove the factor of overheat operation referring to P132. ∗1: Compare the resistance value of discharge pipe thermistor and the value based on the surface thermometer. (Refer to P106 for the temperature and resistance characteristics of thermistor) 100 Air Cooled Refrigeration Condensing Unit SiENBE28-901 Troubleshooting 6.6.9 “H0” Three-sensor Malfunction Remote Controller Display H0 Applicable Models LRMEQ5~20AY1 LRLEQ5~20AY1 Method of Malfunction Detection Malfunction is detected from the values detected by pressure sensors and temperature sensors (thermistors). Malfunction Decision Conditions Three or more out of the pressure sensors and the temperature sensors (thermistors) causes a "Sensor malfunction", respectively. Supposed Causes Faulty connection of sensor Faulty outdoor unit PCB Air Cooled Refrigeration Condensing Unit 101 Troubleshooting SiENBE28-901 Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. *Three or more sensors malfunction. Check for the malfunction history (malfunction code) on the remote controller to identify three or more malfunctioning sensors. (See*1) Check the malfunctioning sensor identified for their connector connection. Is the resistance normal? (*1) NO Properly connect it. YES Troubleshoot according to the malfunction code of each malfunction sensor. (See the flowchart corresponding to each malfunction code.) Is the resistance normal? NO Replace the relevant sensor. Replace the outdoor unit PCB (control PCB). *1.List of relevant malfunction codes and connectors Malfunction code LRMEQ8, 10, 12AY1 LRLEQ8, 10, 12AY1 LRMEQ15, 20AY1 LRLEQ15, 20AY1 Electrical symbol Connector Electrical symbol Connector Electrical symbol Connector Outdoor air thermistor R1T X18A R1T X18A R1T X18A Discharge pipe (M1C) thermistor R31T X29A R31T Discharge pipe (M2C) thermistor — — R32T Discharge pipe (M3C) thermistor — — — J5 Suction pipe thermistor R2T J8 Heat exchanger outlet thermistor R5T J9 Heat exchanger inlet thermistor R6T JA JC High pressure sensor S1NPH X32A S1NPH X32A S1NPH X32A Low pressure sensor S1NPL X31A S1NPL X31A S1NPL X31A H9 J3 102 Relevant thermistor LRMEQ5, 6AY1 LRLEQ5, 6AY1 R31T X29A R32T — R2T X30A R5T X29A R33T R2T X30A R6T R5T X30A R6T Air Cooled Refrigeration Condensing Unit SiENBE28-901 Troubleshooting 6.6.10 “H3” Malfunction Related to High Pressure Switch Remote Controller Display H3 Applicable Models LRMEQ5~20AY1 LRLEQ5~20AY1 Method of Malfunction Detection Detect continuity in the high pressure switch in the protective device circuit. Malfunction Decision Conditions While the compressor stops running, there is no continuity in the high pressure switch. Supposed Causes Faulty high pressure switch Broken wire in the harness of high pressure switch Faulty connection of the connector of high pressure switch Faulty outdoor unit PCB Broken wire in lead wire Troubleshooting Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. Caution Is the high pressure switch connector properly connected to the outdoor unit PCB? (See*1) NO Properly connect it. YES Stop the compressor for a period of 10 minutes, and then carry out the following checks. Is there continuity in the high pressure switch? NO Replace the high pressure switch having no continuity in it. * Normal resistance: Not more than 10Ω YES Is there continuity in the lead wire? NO Replace the lead wire. YES Replace the outdoor PCB. *1 The table below shows the connector numbers of the high pressure switch. Model Relevant PCB Electric symbol Connector No. LRMEQ5, 6AY1 LRLEQ5, 6AY1 A1P S1PH X2A LRMEQ8, 10, 12AY1 LRLEQ8, 10, 12AY1 A1P S1PH S2PH X2A X3A LRMEQ15, 20AY1 LRLEQ15, 20AY1 A1P S1PH S2PH S3PH X2A X3A X4A Air Cooled Refrigeration Condensing Unit 103 Troubleshooting SiENBE28-901 6.6.11 “H7” Abnormal Outdoor Fan Motor Signal Remote Controller Display H7 Applicable Models LRMEQ5~20AY1 LRLEQ5~20AY1 Method of Malfunction Detection Detection of abnormal signal from fan motor. Malfunction Decision Conditions In case of detection of abnormal signal at starting fan motor. Supposed Causes Abnormal fan motor signal (circuit malfunction) Broken, short or disconnection connector of fan motor connection cable Fan Inverter PCB malfunction (A4P or A8P) 104 Air Cooled Refrigeration Condensing Unit SiENBE28-901 Troubleshooting Troubleshooting Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. Caution Cut the power supply off. Is the fan motor connector (X2A) properly connected to the fan inverter PCB? NO Ensure correct connection. YES Check the connector of the fan motor (∗1). Check if the resistance of the fan motor lead wire between Vcc and UVW and between GND and UVW are balanced. NO Replace the fan motor. YES Replace the inverter PCB. z For fan motor 1: replace the inverter PCB (A4P). z For fan motor 2: replace the inverter PCB (A8P). ∗1. Check procedure for fan motor connector (1) Power OFF the fan motor. (2) Remove the connector (X2A) on the PCB to measure the following resistance value. Judgement criteria: resistance value between each phase is within ±20% Connector for signal wires (X2A) X2A 5 Gray GND 4 Pink Vcc 3 Orange W 2 Blue V 1 Yellow U Air Cooled Refrigeration Condensing Unit Measure the resistance between VccUVW and GND-UVW. 105 Troubleshooting SiENBE28-901 6.6.12 “H9” Malfunction of Outdoor Air Thermistor Remote Controller Display H9 Applicable Models LRMEQ5~20AY1 LRLEQ5~20AY1 Method of Malfunction Detection Malfunction is detected from the temperatures detected by the outdoor air thermistor. Malfunction Decision Conditions While in operation, the thermistor causes a broken wire or a short circuit in it. Supposed Causes Faulty thermistor Faulty connection of connector Faulty outdoor unit PCB (control PCB) Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. Check for connector connection. NO Is the resistance normal? Properly connect it. YES Disconnect the thermistor from the outdoor unit PCB, and then make resistance measurement using a multiple meter. NO Is the resistance normal? (*1) Replace the thermistor. YES Replace the outdoor unit PCB (control PCB). *1. For "temperature and resistance characteristics of thermistor", refer to the table shown below. 106 Temp.(°C) Resistance (kΩ) Temp.(°C) Resistance (kΩ) 0 2 4 6 8 65.8 59.4 53.7 48.6 44.0 30 32 34 36 38 16.1 14.8 13.6 12.5 11.5 10 12 14 16 18 40.0 36.3 33.0 30.1 27.4 40 42 44 46 48 10.6 9.8 9.1 8.4 7.7 20 22 24 26 28 25.0 22.9 20.9 19.1 17.5 50 52 54 56 58 7.2 6.7 6.2 5.7 5.3 Air Cooled Refrigeration Condensing Unit SiENBE28-901 Troubleshooting 6.6.13 “J2” Current Sensor Malfunction Remote Controller Display J2 Applicable Models LRMEQ5~20AY1 LRLEQ5~20AY1 Method of Malfunction Detection Malfunction is detected from the current value detected by current sensor. Malfunction Decision Conditions When the current value detected by current sensor becomes 5A or lower, or 40A or more during STD compressor operation. Supposed Causes Faulty current sensor Faulty outdoor unit PCB Defective compressor Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. Is the connector for current sensor connected to X25A, X26A on outdoor unit PCB (A1P)? NO Connect the connector, and operate unit again. YES Are the current sensors inversely connected to two STD compressors? YES Correct the connections between the current sensors and the STD compressors. NO Applicable compressor coil wire is broken. YES Replace the compressor. NO Is the current sensor mounted on the T-phase wire? YES NO Mount the current sensor correctly, and operate the unit again. Replace the current sensor. Retry Replace the outdoor unit PCB. (V3071) Air Cooled Refrigeration Condensing Unit 107 Troubleshooting SiENBE28-901 6.6.14 “J3,J5,J8,J9” Faulty Thermistor Remote Controller Display J3,J5,J8,J9 Applicable Models LRMEQ5~20AY1 LRLEQ5~20AY1 Method of Malfunction Detection Malfunction is detected from the temperatures detected by thermistors. Malfunction Decision Conditions While in operation, any of the thermistors causes a broken wire or a short circuit in it. Supposed Causes Faulty connection of thermistor Faulty thermistor Faulty outdoor unit PCB 108 Air Cooled Refrigeration Condensing Unit SiENBE28-901 Troubleshooting Troubleshooting Caution NO Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. Is the malfunction code "J3" displayed? YES There are multiple relevant thermistors. Identify the thermistor using the monitor mode of the outdoor unit PCB. Check for connector connection. (*1) Is the resistance normal? NO Properly connect it. YES Disconnect the thermistor from the outdoor unit PCB, and then make resistance measurement using a multiple meter. Is the resistance normal? (*2) NO Replace the thermistor. YES Replace the outdoor unit main PCB. *1. List of malfunction codes, description of malfunction, and electric symbols Malfunction code H9 J3 Relevant thermistor LRMEQ5, 6AY1 LRLEQ5, 6AY1 LRMEQ8, 10, 12AY1 LRLEQ8, 10, 12AY1 LRMEQ15, 20AY1 LRLEQ15, 20AY1 Electrical symbol Connector Electrical symbol Connector Electrical symbol Connector Outdoor air thermistor R1T X18A R1T X18A R1T X18A Discharge pipe (M1C) thermistor R31T X29A R31T Discharge pipe (M2C) thermistor — — R32T Discharge pipe (M3C) thermistor — — — X29A — R31T R32T X29A R33T J5 Suction pipe thermistor R2T J8 Heat exchanger outlet thermistor R5T J9 Heat exchanger inlet thermistor R6T JA JC High pressure sensor S1NPH X32A S1NPH X32A S1NPH X32A Low pressure sensor S1NPL X31A S1NPL X31A S1NPL X31A R2T X30A R5T R2T X30A R6T R5T X30A R6T *2. For "temperature and resistance characteristics of thermistor", refer to information on P.138. Air Cooled Refrigeration Condensing Unit 109 Troubleshooting SiENBE28-901 6.6.15 “JA” Malfunction of High Pressure Sensor Remote Controller Display JA Applicable Models LRMEQ5~20AY1 LRLEQ5~20AY1 Method of Malfunction Detection Malfunction is detected from the pressure detected by the high pressure sensor. Malfunction Decision Conditions When the high pressure sensor is short circuit or open circuit. (Not less than 4.3MPa, or 0.01MPa and below) Supposed Causes 110 Defect of high pressure sensor Connection of low pressure sensor with wrong connection Defect of outdoor unit PCB Defective connection of high pressure sensor Air Cooled Refrigeration Condensing Unit SiENBE28-901 Troubleshooting Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. 1.Set the high pressure gauge. 2.Connect a RAM monitor. Are the characteristics of the high pressure sensor normal? (Make a comparison between the voltage characteristics (∗1) and the gauge pressure.) NO Replace the high pressure sensor. YES If the PCB pressure detection normal? (Make a comparison between the checker pressure data and the voltage characteristics (∗1).) NO Replace the main PCB. YES Reset the operation, and then restart the outdoor unit. Are the characteristics of the high pressure sensor normal? (*2) NO Replace the high pressure sensor. YES Replace the main PCB. ∗1: Voltage measurement point +5V GND Connector (Red) X32A (4) Red (3) Black (2) (1) Micro-computer A/D input White High pressure sensor Outdoor unit PCB (A2P) (S1NPH) ∗2 Measure DC voltage here. (V2807) ∗2: Refer to “Voltage Characteristics of Pressure Sensor” table on P.139. Air Cooled Refrigeration Condensing Unit 111 Troubleshooting SiENBE28-901 6.6.16 “JC” Malfunction of Low Pressure Sensor Remote Controller Display JC Applicable Models LRMEQ5~20PY1 LRLEQ5~20PY1 Method of Malfunction Detection Malfunction is detected from pressure detected by low pressure sensor. Malfunction Decision Conditions When the low pressure sensor is short circuit or open circuit. (Not less than 1.8MPa, or -0.1MPa and below) Supposed Causes 112 Defect of low pressure sensor Connection of high pressure sensor with wrong connection Defect of outdoor unit PCB Defective connection of low pressure sensor Piping with wrong connection Reduction of low pressure when the thermistors (Ti, Tg) are defective. Air Cooled Refrigeration Condensing Unit SiENBE28-901 Troubleshooting Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. Piping for different circuit is erroneously connected. YES Correct the piping. NO 1.Set the low pressure gauge. 2.Connect a RAM monitor. Are the characteristics of the low pressure sensor normal? (Make a comparison between the voltage characteristics (∗1) and the gauge pressure.) NO Replace the low pressure sensor. YES If the PCB pressure detection normal? (Make a comparison between the checker pressure data and the voltage characteristics (*1).) NO Replace the main PCB. YES Reset the operation, and then restart the outdoor unit. Are the characteristics of the low pressure sensor normal?(∗2) NO Replace the low pressure sensor. YES Replace the main PCB. (V2808) ∗1: Voltage measurement point +5V GND Micro-computer A/D input Connector X31A (4) Red (3) Black (2) White (1) Low pressure sensor Outdoor unit PCB (A2P) (S1NPL) ∗2 Measure voltage here. ∗2: Refer to “Voltage Characteristics of Pressure Sensor” table on P.139. Air Cooled Refrigeration Condensing Unit 113 Troubleshooting SiENBE28-901 6.6.17 “L1” Faulty Inverter PCB Remote Controller Display L1 Applicable Models LRMEQ5~20AY1 LRLEQ5~20AY1 Method of Malfunction Detection Malfunction is detected from the current values while waveform is outputted prior to the startup of compressor. Malfunction is detected from the values detected by the current sensor in synchronized operation at startup. Malfunction Decision Conditions An overcurrent (OCP) flows while waveform is outputted. The current sensor malfunctions while in synchronized operation. IGBT malfunctions. Supposed Causes Faulty inverter PCB (A3P) • Faulty IPM • Faulty current sensor • Faulty IGBT or drive circuit Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. Turn OFF the power supply once, and then ON it again. Is the power supply normally reset? YES There are possible external causes (e.g. noises) other than failures. NO Replace the inverter PCB (A3P). 114 Air Cooled Refrigeration Condensing Unit SiENBE28-901 Troubleshooting 6.6.18 “L4” Malfunction of Inverter Radiating Fin Temperature Rise Remote Controller Display L4 Applicable Models LRMEQ5~20AY1 LRLEQ5~20AY1 Method of Malfunction Detection Fin temperature is detected by the thermistor of the radiation fin. Malfunction Decision Conditions When the temperature of the inverter radiation fin increases above 93°C. Supposed Causes Actuation of fin thermal (Actuates above 93°C) Faulty inverter PCB Faulty radiating fin thermistor Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. The radiation fin temp. rises to over 87°C. YES NO Faulty radiation of power unit • Blocked air inlet • Dirty radiation fin • High outdoor temperature Turn OFF the power supply, and then make measurement of resistance of the radiation fin thermistor. Is the resistance of the thermistor normal? NO Replace the thermistor. YES Connect and disconnect the radiation fin thermistor connector (X111A) to properly connect it. Turn ON the power supply to start operation, and then check whether the malfunction recurs. YES NO (Reference) Reset temperatures • LRMEQ5~20AY1, LRLEQ5~20AY1 Not more than 79°C for a period of one minute Air Cooled Refrigeration Condensing Unit Replace the inverter PCB. Continue the operation. z The radiation fin temperature can have risen due to field factors. In this case, check for the following: • Whether the radiation fin gets stained. • Whether air flow is interrupted (due to dust or foreign matters) or the fan propeller gets damaged. • Whether the outdoor air temperature is too high. 115 Troubleshooting SiENBE28-901 6.6.19 “L5” INV Compressor Instantaneous Overcurrent Remote Controller Display L5 Applicable Models LRMEQ5~20AY1 LRLEQ5~20AY1 Method of Malfunction Detection Malfunction is detected from the currents flowing in the power transistor. Malfunction Decision Conditions An overcurrent (59.1A) flows even instantaneously. Supposed Causes 116 Faulty compressor coil (e.g. broken wire or insulation failure) Compressor startup failure (mechanical lock) Faulty inverter PCB Slugging of refrigerant Abrasion of sliding parts caused by wet operation due to faulty secondary equipment expansion valve Failure of oil return due to faulty on site piping work Liquid return caused by operation signal connection failure Air Cooled Refrigeration Condensing Unit SiENBE28-901 Troubleshooting Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. Is the stop valve open? NO Open the stop valve. YES Is the compressor lead wire normal? NO Replace the compressor lead wire. YES Are wirings and wire connections to the compressor normal? NO Correct the wirings and wire connections. YES Power OFF The insulation resistance of the compressor is not more than 100kΩ YES Replace the INV compressor. NO There is a broken wire in the compressor coil. NO Check4 (P.133) Is the power transistor normal? YES NO Replace the INV compressor. Replace the inverter PCB (A3P). YES When restarting, the fault recurs. NO YES Power OFF Replace the inverter PCB (A3P). When restarting, the fault recurs. YES Air Cooled Refrigeration Condensing Unit Continue the operation. Factors such as instantaneous power failure are supposed. NO Continue the operation. Replace the INV compressor. 117 Troubleshooting SiENBE28-901 6.6.20 “L8” INV Compressor Overload Remote Controller Display L8 Applicable Models LRMEQ5~20AY1 LRLEQ5~20AY1 Method of Malfunction Detection Malfunction is detected from the currents flowing in the power transistor. Malfunction Decision Conditions Currents on the secondary side of the inverter come to the following values. (1) Not less than 19A for a period of consecutive 5 seconds (2) Not less than 16.1A for a period of consecutive 260 seconds Supposed Causes 118 Compressor overload Broken wire in compressor coil Disconnection of compressor wiring Faulty inverter PCB Slugging of refrigerant Abrasion of sliding parts caused by wet operation due to faulty secondary equipment expansion valve Failure of oil return due to faulty on site piping work Liquid return caused by operation signal connection failure Air Cooled Refrigeration Condensing Unit SiENBE28-901 Troubleshooting Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. Is the stop valve open? NO Open the stop valve. YES Is the compressor lead wire normal? NO Replace the compressor lead wire. YES Are wirings and wire connections to the compressor normal? NO Correct the wirings and wire connections. YES Power OFF The insulation resistance of the compressor is not more than 100kΩ YES Replace the INV compressor. NO There is a broken wire in the compressor coil. NO Check4 (P.133) Is the power transistor normal? YES NO Replace the INV compressor. Replace the inverter PCB (A3P). YES Connect the compressor lead wire, and then restart operation. The malfunction "L8" recurs. NO Continue the operation. YES Is a difference between high pressure and low pressure prior to restarting not more than 0.2MPa? YES Air Cooled Refrigeration Condensing Unit NO Faulty pressure equalization in the refrigerant circuit Check for compressor 119 Troubleshooting SiENBE28-901 6.6.21 “L9” Faulty INV Compressor Startup Remote Controller Display L9 Applicable Models LRMEQ5~20AY1 LRLEQ5~20AY1 Method of Malfunction Detection Malfunction is detected from the signal waveforms of the compressor. Malfunction Decision Conditions The compressor startup sequence is not complete. Supposed Causes 120 Failure to open the stop valve Faulty compressor Erroneous wire connections to compressor Large differential pressure prior to compressor startup Faulty inverter PCB Slugging of refrigerant Abrasion of sliding parts caused by wet operation due to faulty secondary equipment expansion valve Failure of oil return due to faulty onsite piping work Liquid return caused by operation signal connection failure Too frequent on/off operation due to insufficient loading Air Cooled Refrigeration Condensing Unit SiENBE28-901 Troubleshooting Troubleshooting Caution NO Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. Is the first time for the compressor to start after installation? YES Is a proper amount of refrigerant charged? YES NO Is the stop valve open? NO Charge a proper amount of refrigerant. Open the stop valve. YES Refrigerant is slugging. (No power is applied for a period of not less than 6 hours.) YES Eliminate the slugging of refrigerant. NO Is the insulation resistance of compressor maintained at not less than 100kΩ? NO Eliminate the slugging of refrigerant. YES Is the compressor lead wire disconnected? YES NO Refrigerant is slugging. (No power is applied for a period of not less than 6 hours.) Connect the compressor lead wire. Rectify, apply power, and then restart operation. Recheck for the compressor and the refrigerant circuit. NO Eliminate the slugging of refrigerant. YES Is the insulation resistance of compressor maintained at not less than 100kΩ? NO Replace the INV compressor. YES There is a broken wire in the compressor. YES Replace the INV compressor. NO Check4 (P.133) Is the power transistor normal? NO Replace the compressor INV PCB (A3P). YES Recheck the compressor and refrigerant system. Air Cooled Refrigeration Condensing Unit 121 Troubleshooting SiENBE28-901 6.6.22 “LC” Malfunction of Transmission (between Inverter PCB and Main PCB) Remote Controller Display LC Applicable Models LRMEQ5~20PY1 LRLEQ5~20PY1 Method of Malfunction Detection Check the communication state between the inverter PCB and the control PCB by microcomputer. Malfunction Decision Conditions When the correct communication is not conducted in certain period. Supposed Causes 122 Faulty connection between the inverter PCB and the main PCB Faulty main PCB (transmission part) Faulty inverter PCB Faulty noise filter External factors (e.g. noises) Faulty INV compressor Faulty fan motor Air Cooled Refrigeration Condensing Unit SiENBE28-901 Troubleshooting Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. Is the connector connecting between each control PCB and each inverter PCB securely connected? (See *1) NO Properly connect the connector. YES Is the type of the inverter PCB correct? (See *2) NO Replace with a proper PCB. YES The insulation resistance of the INV compressor is not more than 100kΩ. YES Replace the INV compressor. NO The insulation resistance of the fan motor is not more than 1MΩ. YES Replace the fan motor. NO The micro controller normal monitor LED (green) on the main PCB (A3P) is blinking. NO Not the "LC" malfunction. Recheck for the malfunction code. YES The micro controller normal monitor LED (green) on the inverter PCB is blinking. NO Replace the inverter PCB. YES The "LC" malfunction recurs. YES Replace the outdoor unit main PCB (A1P). NO Continue the operation. Factors such as instantaneous power failure are supposed. *1. Connect and disconnect the connector to make sure it is securely connected. *2. List of types of inverter PCB Applicable model LRMEQ5~20AY1 LRLEQ5~20AY1 Air Cooled Refrigeration Condensing Unit Type PC0509-2(A) 123 Troubleshooting SiENBE28-901 6.6.23 “P1” Power Supply Voltage Imbalance Remote Controller Display P1 Applicable Models LRMEQ5~20PY1 LRLEQ5~20PY1 Method of Malfunction Detection Malfunction is detected from the voltage imbalance from the PCB. Malfunction Decision Conditions The power supply voltage causes an imbalance of not less than approx.14V? Continue operation without deciding the malfunction. Supposed Causes Open phase Voltage imbalance between phases Faulty main circuit capacitor Faulty inverter PCB Faulty K2M Faulty main circuit wiring Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. Imbalance in supplied voltage is in excess of 14 V (Y1). ∗1 YES Open phase? NO NO Is the voltage imbalance applied to the inverter in excess of 14 V (Y1)? ∗2 YES NO <When voltage monitoring is possible:> Using a device capable of constant recording of power supply voltage record power supply voltage between 3 phases (L1 ~ L2, L2 ~ L3, L3~L1) for about one continuous week. No abnormalities are observed in the power supply, but the imbalance in voltage recurs. YES Open phase Normalize field cause. Fix power supply voltage imbalance. Part or wiring defect After turning the power supply OFF, check and repair the main circuit wiring or parts. (1) Loose or disconnected wiring between power supply and inverter (2) K2 contact disposition, fusion or contact is poor. (3) Loose or disconnected noise filter ∗1. Measure voltage at the X1M power supply terminal block. ∗2. Measure voltage at terminals RED, BLACK and WHITE wires of the diode module inside the inverter while the compressor is running. Power supply voltage imbalance measure Replace the inverter PCB. Explanation for users ∗In accordance with "notification of inspection results" accompanying spare parts. Give the user a copy of "notification of inspection results" and leave Be sure to explain to the user that there is a "power supply imbalance" it up to him to improve the imbalance. for which DAIKIN is not responsible. 124 Air Cooled Refrigeration Condensing Unit SiENBE28-901 Troubleshooting 6.6.24 “P4” Faulty Radiation Fin Thermistor Remote Controller Display P4 Applicable Models LRMEQ5~20PY1 LRLEQ5~20PY1 Method of Malfunction Detection While the compressor stops running, detect the resistance of the radiation fin thermistor. Malfunction Decision Conditions The thermistor resistance comes to a value equivalent to an open or a short circuit. Supposed Causes Faulty radiation fin thermistor Faulty inverter PCB Faulty INV compressor Faulty fan motor Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. Make measurement of resistance of the radiation fin thermistor. Is the resistance of the thermistor normal? (See*1) NO Replace the inverter PCB. YES The insulation resistance of the INV compressor is not more than 100kΩ. YES Replace the INV compressor. NO The insulation resistance of the fan motor is not more than 1MΩ. YES Replace the fan motor. NO Does the fault recur when turning ON the power supply? YES NO Replace the inverter PCB. Continue the operation. *1. Refer to the characteristics of radiation fin thermistor (P.106). Air Cooled Refrigeration Condensing Unit 125 Troubleshooting SiENBE28-901 6.6.25 “U1” Reverse Phase / Open Phase Remote Controller Display U1 Applicable Models LRMEQ5~20PY1 LRLEQ5~20PY1 Method of Malfunction Detection Make judgement by detecting the state of every phase in the reverse phase detection circuit. Malfunction Decision Conditions The power supply voltage has a reverse phase or the phase T is open. Supposed Causes Reverse phase of power supply Open phase T of power supply Faulty outdoor unit PCB Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. The phase T is open at the power supply terminal block (X1M) of the outdoor unit. YES Rectify the open phase. Need to check for a field power supply unit. NO Changing power supply cable connections between phases enables normal operation. YES The power supply has a reverse phase. Change power supply cable connections NO Replace the outdoor unit main PCB. 126 Air Cooled Refrigeration Condensing Unit SiENBE28-901 Troubleshooting 6.6.26 “U2” Abnormal Power Supply Voltage Remote Controller Display U2 Applicable Models LRMEQ5~20PY1 LRLEQ5~20PY1 Method of Malfunction Detection Malfunction is detected from the voltage of the main circuit capacitor in the inverter. Malfunction Decision Conditions When the voltage aforementioned is not less than 780V or not more than 320V, or when the current-limiting voltage does not reach 200V or more or exceeds 740V. Supposed Causes Power supply voltage drop Instantaneous power failure Open phase Faulty inverter PCB Faulty control box PCB Faulty compressor Faulty wiring in the main circuit Faulty fan motor Faulty connection of signal cable Air Cooled Refrigeration Condensing Unit 127 Troubleshooting SiENBE28-901 Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. Check for power supply voltage. Voltage between phases: 380 to 415V (Y1) YES Power ON Power OFF NO Unbalanced power supply? (Not more than NO 2%: Phase voltage of not more than approx. 5V) YES Disconnect the cable from the compressor, and then check the compressor for the insulation resistance. YES The insulation resistance is low. (i.e., not more than 100kΩ.) NO Disconnect the cable from the fan, and then check the fan motor for the insulation resistance. The insulation resistance is low (i.e., not more than 1MΩ.) NO Onsite causes. Make proper wire connections without open phase, erroneous connections, or erroneous order of phases. Onsite causes. Correct the unbalanced loads to eliminate the unbalanced state. Unbalanced voltage will cause extremely unbalanced current, thus impairing the service life of or resulting in the malfunction of the equipment. Replace the compressor. YES Replace the fan motor. Replace the fan driver. Check the inverter power transistor. Has the power transistor got faulty? YES NO Check the fan driver power transistor. Has the power transistor got faulty? NO YES Replace the inverter PCB. I Observe the conditions of the PCB. In the case of a serious failure, a compressor failure may cause the failure of the PCB. Even if the PCB is replaced, it may cause failure again. To avoid that, recheck the compressor for ground and for any broken wires. Furthermore, even after the completion of PCB replacement, check the compressor. Replace the fan driver PCB. I Observe the conditions of the PCB. A 128 Air Cooled Refrigeration Condensing Unit SiENBE28-901 Troubleshooting A Power OFF Check for connector connections: Remove and insert the connectors shown below. Furthermore, check the connectors for terminal conditions and continuity. RXQPAY1: • X1M power receiving terminal ⇔ X400A A2P • A2P X401A ⇔ X10A A3P • A1P X28A ⇔ X6A A3P • A3P X61A ⇔ X402A A2P • A3P X1A ⇔ X403A A2P • A3P P1, P2 ⇔ Reactor terminal L1R • A3P P3, N3 ⇔ P1, N1 A4P • A4P P2, N2 ⇔ P1, N1 A8P Has the inverter PCB caused damage? YES NO Has the fan driver caused damage? If any wiring has damage, replace the harness. A3P: Replace the inverter PCB. ∗ If the PCB replaced is badly damaged, the compressor is likely to get faulty. To make sure, recheck the compressor. YES A4P/A8P: Replace the fan driver PCB. ∗ If the PCB replaced is badly damaged, the fan motor is likely to get faulty. To make sure, recheck the compressor. NO Turn ON the power supply. Stop (standby) before the fan rotates. YES NO Power ON Stop (standby) when the compressor starts up. NO YES The “U2” malfunction recurs. YES Recheck for the power supply. If there is no problem with the power supply, replace the A2P noise filter PCB. If the malfunction recurs, replace the inverter PCB. Recheck for the power supply. If there is no problem with the power supply, replace the A3P inverter PCB. ∗ If the PCB replaced is badly damaged, compressor is likely to get faulty. To make sure, recheck the compressor. Check the harness, and then replace it if necessary. NO End of measures: I The malfunction may temporarily result from onsite causes. Causes: Instantaneous power failure (open phase), noises, or else. Air Cooled Refrigeration Condensing Unit 129 Troubleshooting SiENBE28-901 [Check 1] Check for Causes of Rise in High Pressure Referring to the Fault Tree Analysis (FTA) shown below, identify faulty points. Closed stop valve Partly rise in pressure Bended or crushed pipe ←Visual check High piping resistance Clogged piping due to foreign matters [In cooling] If the indoor unit electronic expansion valve is throttled: Rise in high pressure Faulty high pressure control [In frosting] If the outdoor unit electronic expansion valve is excessively throttled: Faulty outdoor Faulty valve coil unit electronic expansion valve Faulty valve body Abnormal if a temp. difference between inlet and outlet is over 10°C. Faulty high pressure sensor Faulty control Faulty outdoor unit main PCB Faulty valve coil Faulty indoor unit electronic expansion valve Suction air temperature of the condenser too high Suction air temperature of the outdoor unit too high Degradation in condensing capacity Dirty condenser Drop in fan output High air duct resistance 130 ←Is the coil resistance and the insulation normal? (See [Check 10]) ←Are the voltage characteristics normal? ←Is the pressure value on the Service Checker matched to the measurement of sensor? ←Is the coil resistance and the insulation normal? (See [Check 10]) Faulty high pressure sensor ←Are the voltage characteristics normal? Faulty indoor unit liquid pipe thermistor ←Is the connector properly connected? Are the thermistor resistance characteristics normal? Faulty outdoor unit main PCB ←Is the pressure value on the Service Checker matched to the measurement of sensor? Short circuit ←Is the suction temp. not more than 43°C? High ambient temp. ←Is the outdoor temp. not more than 43°C? ←Does the heat exchanger get clogged? ←Does air get mixed in the refrigerant circuit? Mixing of noncondensing gas Refrigerant overcharged ←Check for any temp. difference before and after filter or branch piping. Faulty valve body Faulty control Drop in fan air volume ←Check to be sure that the stop valve is open. ←Faulty fan motor ←Can the fan motor be rotated by hand? Is the resistance and insulation of motor coil normal? Faulty outdoor unit main PCB ←Is the capacity setting of spare PCB (including correct, if used? capacity setting) Dirty filter ←Does the air filter get clogged? Obstacles ←Is there any obstacle in the air duct? ←See [Check 6]. Air Cooled Refrigeration Condensing Unit SiENBE28-901 Troubleshooting [Check 2] Check for Causes of Drop in Low Pressure Referring to the Fault Tree Analysis (FTA) shown below, identify faulty points. (∗1) Faulty compressor capacity control Faulty low pressure control ←Are the voltage characteristics normal? Faulty outdoor unit main PCB ←Is the pressure value on the Service Checker matched to the measurement of sensor? ←Are the voltage characteristics normal? Faulty low pressure sensor Faulty low pressure (∗2) protection control Low pressure is too low. (Evaporating temp. is low) Faulty low pressure sensor [In cooling] If the indoor unit electronic expansion valve is excessively throttled: (See ∗3) Faulty electronic expansion valve control Faulty indoor unit electronic expansion valve Suction air temperature of the evaporator too low ←Is the pressure value on the Service Checker matched to the measurement of sensor? Faulty valve coil ←Is the coil resistance and the insulation normal? Faulty valve body Faulty control Faulty indoor unit gas pipe thermistor ←Check for thermistor resistance and connector connection. Faulty indoor unit liquid pipe thermistor ←Check for thermistor resistance and connector connection. Faulty outdoor unit main PCB ←Is the pressure value on the Service Checker matched to the measurement of sensor? ←Is the coil resistance and the insulation normal? Faulty valve coil Faulty outdoor unit electronic expansion valve [In defrosting] If the outdoor unit electronic expansion valve is excessively throttled: (See ∗4) Faulty outdoor unit main PCB Faulty valve body Faulty control Faulty low pressure sensor ←Are the voltage characteristics normal? Faulty suction pipe thermistor ←Check for thermistor resistance and connector connection. Faulty outdoor unit main PCB Suction air temperature of the indoor unit too low Short circuit ←Does the suction air temps. fall in the "continuous operation range of inside temperature"? Low ambient temp. ←Does the inside temps. fall in the "continuous operation range"? ←Is the connector properly connected? Are the thermistor resistance characteristics normal? Faulty indoor unit suction air thermistor Abnormal piping length High piping resistance Bended or crushed pipe Clogged piping due to foreign matters Stop valve closed Low refrigerant circulation rate ←Does the piping length fall in the permissible range? ←Visual check ←Check for any temp. difference before and after filter or branch piping. ←Check to be sure that the stop valve is open. Refrigerant shortage ←See [Check 6]. Moisture choke ←Remove moisture by vacuum drying. Dirty evaporator ←Does the heat exchanger get clogged? Degradation in evaporating capacity Drop in fan air volume Drop in fan output High air duct resistance Faulty fan motor ←Can the fan motor be rotated by hand? Is the resistance and insulation of motor coil normal? Faulty outdoor unit main PCB (including capacity setting) ←Is the capacity setting of spare PCB correct, if used? Dirty filter ←Does the air filter get clogged? Obstacles ←Is there any obstacle in the air duct? ∗1. For the compressor capacity control in cooling, refer to information in "Compressor Control". ∗2. "Low pressure protection control" includes low pressure drooping control. ∗3. The indoor unit electronic expansion valve exerts "superheated degree control" in cooling. ∗4. The outdoor unit electronic expansion valve (EV1) exerts "superheated degree control of outdoor unit heat exchanger" in defrosting. Air Cooled Refrigeration Condensing Unit 131 Troubleshooting SiENBE28-901 [Check 3] Check for Causes of Overheat Operation Referring to the Fault Tree Analysis (FTA) shown below, identify faulty points. Faulty discharge pipe temp. control Faulty outdoor unit electronic expansion valve (EV3) Faulty subcool electronic expansion valve Faulty control (See ∗1) Overheat of compressor [In cooling] If the indoor unit electronic expansion valve is excessively throttled: (See ∗2) ←Are the voltage characteristics normal? ←Is the connector properly connected? Are the thermistor resistance characteristics normal? ←Is the pressure value on the Service Checker matched to the measurement of sensor? ←Are the temperatures of pipes connected to the four-way valve normal? Overheat due to damage shaft Overheat due to faulty compressor Faulty indoor unit electronic expansion valve Faulty valve coil ←Is the coil resistance and the insulation normal? Faulty valve body Faulty indoor unit gas pipe thermistor Faulty control Faulty indoor unit liquid pipe thermistor Faulty outdoor unit main PCB Faulty outdoor unit electronic expansion valve Faulty control ←Is the connector properly connected? Are the thermistor resistance characteristics normal? ←Is the connector properly connected? Are the thermistor resistance characteristics normal? ←Is the coil resistance and the insulation normal? Faulty valve coil Faulty valve body Faulty low pressure sensor Faulty suction pipe thermistor Faulty outdoor unit main PCB Refrigerant gas shortage High piping resistance Faulty low pressure sensor Faulty thermistor at subcool heat exchanger outlet Four-way valve cut off halfway Faulty superheated degree control [In defrosting] If the outdoor unit electronic expansion valve is excessively throttled: (See ∗3) ←Is the coil resistance and the insulation normal? Faulty valve body Faulty outdoor unit main PCB Rise in discharge pipe temp. Faulty fourway valve operation Faulty valve coil ←Are the voltage characteristics normal? ←Is the connector properly connected? Are the thermistor resistance characteristics normal? ←Is the pressure value on the Service Checker matched to the measurement of sensor? ←See [Check 6]. Abnormal piping length ←Does the piping length fall in the permissible range? Bended or crushed pipe ←Visual check (Including moisture choke) ←Remove moisture by vacuum drying. Closed stop valve ←Check to be sure that the stop valve is open. ∗1. For subcool electronic expansion valve control, refer to information in "Electronic expansion valve control". ∗2. The indoor unit electronic expansion valve exerts "superheated degree control" in cooling. ∗3. The outdoor unit electronic expansion valve (EV1) exerts "superheated degree control" in defrosting. ∗4. Guideline for superheated degree by which a malfunction is judged as overheat operation (1) Suction gas superheated degree: Not less than 10°C / (2) Discharge gas superheated degree: Not less than 45°C; provided, however, that superheated degrees immediately after startup or for drooping control are excluded. (The values aforementioned are just a guideline. Even if the values fall within the range shown above, these values may be normal depending on other conditions.) 132 Air Cooled Refrigeration Condensing Unit SiENBE28-901 Troubleshooting [Check 4] Check for Power Transistor <LRMEQ5~20AY1, LRLEQ5~20AY1> Checking failures in power semiconductors mounted on inverter PCB Check the power semiconductors mounted on the inverter PCB by the use of a multiple tester. <Items to be prepared> z Multiple tester : Prepare the analog type of multiple tester. For the digital type of multiple tester, those with diode check function are available for the checking. <Test points> z Turn OFF the power supply. Then, after a lapse of 10 minutes or more, make measurement of resistance. <Preparation> z To make measurement, disconnect all connectors and terminals. Inverter PCB J1 J2 J3 P1 P3 N3 U V W Electronic circuit DM P1 P2 P3 IGBT X10A K2 J1 L1 J2 L2 L3 J3 N3 U V W X11A According to the checking aforementioned, it is probed that the malfunction results from the faulty inverter. The following section describes supposed causes of the faulty inverter. z Faulty compressor (ground leakage) z Faulty fan motor (ground leakage) z Entry of conductive foreign particles z Abnormal voltage (e.g. overvoltage, surge (thunder), or unbalanced voltage) In order to replace the faulty inverter, be sure to check for the points aforementioned. Air Cooled Refrigeration Condensing Unit 133 Troubleshooting SiENBE28-901 [Check 5] Check for Causes of Wet Operation Referring to the Fault Tree Analysis (FTA) shown below, identify faulty points. Refrigerant accumulation Excessive compressor ON-OFF ←See [Check 6]. Refrigerant overcharge [In cooling] If the indoor unit electronic expansion valve excessively opens: (See ∗1) Faulty valve body Faulty indoor unit gas pipe thermistor Faulty control Faulty indoor unit liquid pipe thermistor Faulty superheated degree control Faulty outdoor unit main PCB [In defrosting] If the outdoor unit electronic expansion valve excessively opens: (See ∗2) Faulty valve body Faulty low pressure sensor Faulty suction pipe thermistor Faulty outdoor unit main PCB Faulty control ←Are the voltage characteristics normal? Is the connector properly connected? ←Are the thermistor resistance characteristics normal? ←Is the pressure value on the Service Checker matched to the measurement of sensor? ←Does the heat exchanger get clogged? Dirty evaporator Drop in fan output Degradation in evaporating capacity ←Is the connector properly connected? Are the thermistor resistance characteristics normal? ←Is the connector properly connected? Are the thermistor resistance characteristics normal? ←Is the coil resistance and the insulation normal? Faulty valve coil Faulty outdoor unit electronic expansion valve Wet operation ←Is the coil resistance and the insulation normal? Faulty valve coil Faulty indoor unit electronic expansion valve Faulty fan motor ←Can the fan motor be rotated by hand? Is the resistance and insulation of motor coil normal? Faulty outdoor unit main PCB (including capacity setting) Drop in air volume High air duct resistance Dirty filter ←Does the air filter get clogged? Obstacles ←Is there any obstacle in the air duct? ∗1. The indoor unit electronic expansion valve exerts "superheated degree control" in cooling. ∗2. The outdoor unit electronic expansion valve (EV1) exerts "superheated degree control" in defrosting. ∗3. Guideline for superheated degree by which a malfunction is judged as wet operation (1) Suction gas superheated degree: Less than 3°C / (2) Discharge gas superheated degree: Less than 15°C; provided, however, that superheated degrees immediately after startup or for drooping control are excluded. (The values aforementioned are just a guideline. Even if the values fall within the range shown above, these values may be normal depending on other conditions.) 134 Air Cooled Refrigeration Condensing Unit SiENBE28-901 Troubleshooting [Check 6] Check for Refrigerant Amount Due to relationship to pressure control and electronic expansion valve control, the refrigerant amount needs to be judged according to operating conditions. Refer to information shown below for making judgements. Diagnosis of Refrigerant Overcharge 1. High pressure becomes higher. Consequently, overload control is exerted to make the capacity slightly inadequate. 2. The superheated degree of suction gas becomes lower (or the system is put into wet operation). Consequently, the compressor discharge pipe temperature becomes lower for pressure loads. 3. The subcooled degree of condensate becomes higher. High pressure drooping control High pressure gradually rises with increasing operating frequency. Operating frequency comes to the lowest level. Subcooled degree becomes higher. (The temperature of liquid connection piping becomes lower.) High pressure (Low pressure is maintained at a certain level.) Low pressure Low pressure rises with lowering compressor output. Operating frequency To maintain low pressure, operating frequency increases on the capacity control. (Degree of overcharge) Proper amount Further overcharge Diagnosis of Refrigerant Shortage 1. The superheated degree of suction gas becomes higher, and the temperature of compressor discharge gas also becomes higher. 2. The superheated degree of suction gas becomes higher, and the electronic expansion valve shifts to slightly open. 3. Low pressure is too low to demonstrate cooling capacity (or heating capacity). 4. The liquid level gauge falls into the flash state. The opening degree of the indoor unit electronic expansion valve comes larger. Fan control, i.e., actually hunting to maintain high pressure on the cooling Either electronic expansion valve fully opens. control with low outdoor air Operating frequency comes to the lowest level. High pressure Low pressure Low pressure rises with increasing opening degree of the indoor unit electronic expansion valve, and the operating frequency slightly increases due to the capacity control. Operating frequency (Low pressure is maintained at a certain level.) High pressure increases due to compressor capcity decreasing. If the operating frequency reaches the lowest level, low pressure cannot be maintained. To maintain low pressure, operating frequency increases on the capacity control. (Degree of refrigerant shortage) Proper amount Air Cooled Refrigeration Condensing Unit Further short 135 Troubleshooting SiENBE28-901 [Check 7] Vacuum Drying Procedure To conduct vacuum drying in the piping system, follow the procedure for <Normal vacuum drying> shown below. Furthermore, if moisture can get mixed in the piping system, follow the procedure for <Special vacuum drying> shown below. <Normal vacuum drying> 1. Vacuum drying • Use a vacuum pump that enables vacuuming to a vacuum level of -100.7kPa (5 torr, -755 mmHg). • Connect a manifold gauge to the service port of the liquid pipe and the gas pipe respectively, and then run the vacuum pump for a period of two or more hours to achieve vacuuming to a vacuum level below -100.7kPa. • If the vacuum level does not reach below -100.7kPa even after vacuuming for a period of two hours, moisture has got mixed in the system or the system has caused vacuum leakage. Consequently, conduct vacuuming for a period of another one hour. • If the vacuum level does not reach below -100.7kPa even after vacuuming for a period of three hours, conduct leak tests. 2. Leaving in vacuum state • Leave the piping system in a vacuum state at a level below -100.7kPa for a period of one or more hours, and then check to be sure that the vacuum gauge reading does not rise. (If the reading rises, moisture remains in the system or vacuum leaks from the piping.) 3. Additional refrigerant charge • Purge air from the hose connected to the manifold gauge, and then charge a necessary amount of refrigerant. <Special vacuum drying> - In case moisture can get mixed in the piping*: 1. Vacuum drying • Follow the same procedure as that for normal vacuum drying 1 aforementioned. 2. Vacuum break • Pressurize to 0.05MPa using nitrogen gas. 3. Vacuum drying • Conduct vacuum drying for a period of one or more hours. If the vacuum level does not reach below -100.7kPa even after vacuuming for a period of two hours, repeat Steps 2 Vacuum break and Step 3 Vacuum drying. 4. Leaving in vacuum state • Leave the piping system in a vacuum state at a level below -100.7kPa for a period of one or more hours, and then check to be sure that the vacuum gauge reading does not rise. 5. Additional refrigerant charge • Purge air from the hose connected to the manifold gauge, and then charge a necessary amount of refrigerant. *Dew may condense in the piping due to construction during rainy season or a long construction period or rainwater may enter the piping during construction. 136 Air Cooled Refrigeration Condensing Unit SiENBE28-901 Troubleshooting [Check 8] List of Malfunction Codes Related to Inverter Protection device, etc. Compressor current Code L5 Name Condition for determining malfunction Major faulty point Inverter getting caught in liquid INV Compressor Inverter output causes an overcurrent Faulty compressor Instantaneous Overcurrent to flow even instantaneously. Faulty inverter PCB L8 Overcurrent of INV compressor (electronic thermal) The compressor performs overload operation. Loss of synchronization is detected. L1 Faulty Inverter PCB No output is produced. Faulty heavy current part of inverter L9 Faulty INV Compressor Startup The compressor motor fails to start up. Inverter getting caught in liquid or faulty compressor Excessive oil or refrigerant Faulty inverter PCB E5 Inverter Compressor Lock L4 Rise in Radiation Fin Temperature U2 Abnormal Power Supply Voltage P1 Power Supply Imbalance LC Malfunction Related to Transmission (between Main PCB and Control PCB) P4 Faulty fin thermistor Air Cooled Refrigeration Condensing Unit The compressor is in locked state (does not rotate). The radiation fin temperature exceeds the reference value (while in operation). The inverter power supply voltage is high or low. Liquid back of compressor Sharp change in load Disconnection of compressor wiring Faulty inverter PCB Faulty compressor Malfunction of fan Long-term overload operation Faulty inverter PCB Abnormal power supply Faulty inverter PCB Abnormal power supply (Power supply imbalance of not less than 2%) Faulty inverter PCB End of PCB service life Broken wire in communication line Faulty control PCB Faulty inverter PCB Faulty fan PCB The three-phase power supply has a significant voltage imbalance. The outdoor unit PCB cannot make communications among the control PCB, inverter PCB, and fan PCB. The fin thermistor gets short-circuited Faulty fin thermistor or open. 137 Troubleshooting SiENBE28-901 [Check 9] Temperature and Resistance Characteristics of Thermistor Outdoor unit Suction air Discharge pipe Radiation fin Type Temperature(°C) Heat exchanger (Inlet and outlet) ST0601 Resistance(kΩ) ST0602 Resistance(kΩ) ST0901 Resistance(kΩ) PTP-46D-D1 Resistance(kΩ) -10 -5 0 5 10 15 20 25 30 35 40 45 50 55 60 65 112.0 85.5 65.8 51.1 40.0 31.6 25.1 20.1 16.2 13.1 10.7 8.8 7.2 6.0 5.0 4.2 10.9 8.6 6.9 5.5 4.4 3.6 2.9 2.4 2.0 1.6 1.4 1.1 1.0 0.82 0.70 0.60 1403.8 1059.5 806.5 618.9 487.8 373.1 292.9 231.4 184.1 141.1 118.7 96.1 78.3 64.1 52.8 43.6 111.4 84.1 64.1 49.4 38.4 30.1 23.8 18.9 15.2 12.3 10.0 8.2 6.8 5.6 4.7 3.9 70 75 80 85 90 95 100 105 110 115 120 3.5 3.0 2.5 2.1 1.8 1.6 1.4 1.2 1.0 0.9 0.8 0.51 0.44 0.38 0.33 0.29 0.25 0.22 0.20 0.17 0.15 0.14 36.3 30.3 25.4 21.4 18.1 15.3 13.1 11.2 9.6 8.3 7.1 3.3 2.8 2.4 2.0 1.7 1.5 1.3 1.1 1.0 0.9 0.8 Applicable 138 Air Cooled Refrigeration Condensing Unit SiENBE28-901 Troubleshooting [Check 10] Voltage Characteristics of Pressure Sensor PH = 1.38VH–0.69 PL = 0.57VL–0.28 VH : Output voltage [High pressure side] VDC VL : Output voltage [Low pressure side] VDC PH : High pressure (MPa) PL : Low pressure (MPa) Pressure detected PH, PL (kg/cm2) MPa 51.0 5.0 45.9 4.5 High pressure (PH) 40.8 4.0 35.7 3.5 30.6 3.0 25.5 2.5 20.4 2.0 (1.7MPa) Low pressure (PL) 15.3 1.5 10.2 1.0 5.1 0.5 0 -5.1 -0.5 -0.5 0 0.5 1 1.5 2 Output voltage (VH, VL) Air Cooled Refrigeration Condensing Unit 2.5 3 3.5 4 VDC 139 0.005 0.01 0.02 0.05 0.1 50 -90 -80 -70 0.00 07 m 3 /kg 0.1 100 0.7 0.2 -60 -40 -50°C 150 0.9 0.5 0.8 075 0 .0 0 0.2 1.0 -30 0.3 -10 200 -20 1.1 m 3/ kg 1.0kJ/(kg • k) m 3/ kg 0.4 0.0 008 1.2 2.0 0°C 1.3 20 250 10 3 9m 30 3 / kg 50°C 350 80 90 400 Enthalpy kJ\kg 300 1.8 /kg 0.6 0 .0 00 1.5 0.0 008 5 m3 /kg 0.5 1.4 40 1.0 3 0.0 00 95 m 1.6 60 2.2 /kg 1.7 70 2.3 450 500 550 3 /kg 600 3 10 m /kg 3 5 m /kg 3 2 m /kg 1 m3 /kg 3 0.5 m /kg 3 g 0.2 m /k 3 g 0.1 m /k 3 0.05 m /kg 3 0.02 m /kg 0.01 m 19 20 3 /kg 0° 17 180 0 C 2m 0.00 15 160 0 14 0° C 0 1 12 30 110 0 m3 /kg 100° 0.005 C 2.4 5 3 4 01 01 0.001 0.0 0.0 2.5 1m 0.0 0 0.7 5.0 2 01 2.6 10.0 -100°C 0.5kJ/(kg • k) x= 0 .0 0.6 0.8 1.9 0.0 2 .7 11 2.0kJ /(kg • k) 0.9 2.1 00 0. 8 2. R-410A 9 140 2. 20.0 650 Troubleshooting SiENBE28-901 Characteristics of Refrigerant and Psychrometric Chart Characteristics of Refrigerant R-410A Pressure MPa Air Cooled Refrigeration Condensing Unit SiENBE28-901 6.7 Troubleshooting Maintenance 1. Procedure for Removal of Parts from Refrigerant System As the results of checking a malfunction, if the malfunction results from part(s) used in the refrigerant system, remove the part(s) referring to the procedure for refrigerant recovery shown below. Location of malfunction Outdoor unit compressors (M1C, M2C and M3C) Procedure for maintenance Solenoid valves (for STD1 and STD2) 1 INV electronic expansion valve Refer to Maintenance 1. Four way valve High pressure switches 2 3 4 Main electronic expansion valve Injection electronic expansion valve Secondary equipment, such as a showcase Dryer High pressure sensor Low pressure sensor Refer to Maintenance 2. Refer to Maintenance 3. A check valve allows it to be removed and replaced without any refrigerant recovery. ∗ If liquid refrigerant was recovered, add refrigeration oil according to the following criteria. Refrigeration oil brand: Idemitsu DAPHNE FVC68D Amount to be added: Volume of recovered refrigerant (kg) x 0.05 liter (Example: If the volume of the refrigerant recovered is 24kg, 24 x 0.05 = 1.2 liter of oil that should be added.) Fill port: Liquid stop valve service port For details about adding oil, see the section that describes the refrigeration oil procedure. Air Cooled Refrigeration Condensing Unit 141 Troubleshooting SiENBE28-901 1) Maintenance 1: Maintenance related to outdoor unit compressor Applicable parts 1 compressor • Compressors (M1C, M2C and M3C) • Solenoid valves (STD1 and STD2) • INV electronic expansion valve • Four way valve • High pressure switch No continuous operations allowed HPSL D HPS1 A HP a Td1 b INV LP Tg Tce C B EV2 c TL EV1 A: Discharge line maintenance valve B: Injection line maintenance valve C: Liquid stop valve D: Gas stop valve a, b, c: Service ports 1. Turn off the operation switch for the outdoor unit. After the outdoor unit has stopped, turn off the power supply for the outdoor unit. 2. Remove the control box. 3. Close the stop valves in the order: A, D and then B. 4. Recover the refrigerant in the compressor through service ports a, b and maintenance valves A and B. ( shaped region.) 5. 6. 7. 8. 142 Repair or replace the applicable parts. ∗ After replacing the compressor, check whether the dryer is WET or DRY using the moisture indicator. If it is WET, replace the dryer. Conduct air tight checks. Conduct vacuuming through the service port b, and the maintenance valve A and B. (If the oil needs to be added, charge it through the service port a.) Turn on the power supply for the outdoor unit. Then turn on the operation switch for the outdoor unit. (If a remote controller switch is used, enable the remote setting.) Charge the refrigerant by the same quantity as that recovered. Air Cooled Refrigeration Condensing Unit SiENBE28-901 Troubleshooting Applicable parts • Compressors (M1C, M2C and M3C) • Solenoid valves (STD1 and STD2) • INV electronic expansion valve • Four way valve • High pressure switch 2 compressors No continuous operations allowed Ta HPSL HP a D HPS1 HPS2 Td1 Td2 INV EV3 C A LP b STD1 SV2 Tce Tg B TL c EV2 EV1 A: Discharge line maintenance valve B: Injection line maintenance valve C: Liquid stop valve D: Gas stop valve a, b, c: Service ports 1. Turn off the operation switch for the outdoor unit. After the outdoor unit has stopped, turn off the power supply for the outdoor unit. 2. Remove the control box. 3. Close the stop valves in the order: A, D and then B. 4. Recover the refrigerant in the compressor through service ports a, b and maintenance valves A and B. ( shaped region.) 5. 6. 7. 8. Repair or replace the applicable parts. ∗ After replacing the compressor, check whether the dryer is WET or DRY using the moisture indicator. If it is WET, replace the dryer. Conduct air tight checks. Conduct vacuuming through the service port b, and the maintenance valve a and B. (If the oil needs to be added, charge it through the service port A.) Turn on the power supply for the outdoor unit. Then turn on the operation switch for the outdoor unit. (If a remote controller switch is used, enable the remote setting.) Charge the refrigerant by the same quantity as that recovered. Air Cooled Refrigeration Condensing Unit 143 Troubleshooting SiENBE28-901 Applicable parts • Compressors (M1C, M2C and M3C) • Solenoid valves (STD1 and STD2) • INV electronic expansion valve • Four way valve • High pressure switch 3 compressors No continuous operations allowed Ta A b HPSL a LP D HP HPS1 HPS2 HPS3 Td1 Td2 Td3 EV3 INV STD1 SV2 STD2 SV3 Tce C B TL c EV2 EV1 Tg A: Discharge line maintenance valve B: Injection line maintenance valve C: Liquid stop valve D: Gas stop valve a, b, c: Service ports 1. Turn off the operation switch for the outdoor unit. After the outdoor unit has stopped, turn off the power supply for the outdoor unit. 2. Remove the control box. 3. Close the stop valves in the order: A, D and then B. 4. Recover the refrigerant in the compressor through service ports a, b and maintenance valves A and B. ( shaped region.) 5. 6. 7. 8. 144 Repair or replace the applicable parts. ∗ After replacing the compressor, check whether the dryer is WET or DRY using the moisture indicator. If it is WET, replace the dryer. Conduct air tight checks. Conduct vacuuming through the service port b, and the maintenance valve a and B. (If the oil needs to be added, charge it through the service port A.) Turn on the power supply for the outdoor unit. Then turn on the operation switch for the outdoor unit. (If a remote controller switch is used, enable the remote setting.) Charge the refrigerant by the same quantity as that recovered. Air Cooled Refrigeration Condensing Unit SiENBE28-901 Troubleshooting 2) Maintenance 2: Maintenance of EV1 and EV2 Applicable parts 1 compressor • Main electronic expansion valve • Injection electronic expansion valve No continuous operations allowed HPSL D HPS1 A HP a Td1 b INV LP Tg Tce C B EV2 c TL EV1 A: Discharge line maintenance valve B: Injection line maintenance valve C: Liquid stop valve D: Gas stop valve a, b, c: Service ports 1. Turn off the operation switch for the outdoor unit. After the outdoor unit has stopped, turn off the power supply for the outdoor unit. 2. Remove the control box. 3. Close the stop valves in the order: C and D. 4. Recover the refrigerant in the compressor through service ports c, b. ( shaped region.) 5. 6. 7. 8. Repair or replace the applicable parts. ∗ After replacing parts, check whether the dryer is WET or DRY using the moisture indicator. If it is WET, replace the dryer. Conduct air tight checks. Conduct vacuuming through the service port c and b. (Then charge the refrigerant according to the quantity as that recovered. And then continue vacuuming.) Turn on the power supply for the outdoor unit. Then turn on the operation switch for the outdoor unit. (If a remote controller switch is used, enable the remote setting.) Charge the refrigerant by the same quantity as that recovered. Air Cooled Refrigeration Condensing Unit 145 Troubleshooting SiENBE28-901 Applicable parts 2 compressors • Main electronic expansion valve • Injection electronic expansion valve No continuous operations allowed Ta HPSL HP a D HPS1 b HPS2 Td2 Td1 STD1 INV EV3 C A LP SV2 Tce Tg B c TL EV2 EV1 A: Discharge line maintenance valve B: Injection line maintenance valve C: Liquid stop valve D: Gas stop valve a, b, c: Service ports 1. Turn off the operation switch for the outdoor unit. After the outdoor unit has stopped, turn off the power supply for the outdoor unit. 2. Remove the control box. 3. Close the stop valves in the order: C and D. 4. Recover the refrigerant in the compressor through service ports c, b. ( shaped region.) 5. 6. 7. 8. 146 Repair or replace the applicable parts. ∗ After replacing parts, check whether the dryer is WET or DRY using the moisture indicator. If it is WET, replace the dryer. Conduct air tight checks. Conduct vacuuming through the service port c and b. (Then charge the refrigerant according to the quantity as that recovered. And then continue vacuuming.) Turn on the power supply for the outdoor unit. Then turn on the operation switch for the outdoor unit. (If a remote controller switch is used, enable the remote setting.) Charge the refrigerant by the same quantity as that recovered. Air Cooled Refrigeration Condensing Unit SiENBE28-901 Troubleshooting Applicable parts 3 compressors • Main electronic expansion valve • Injection electronic expansion valve No continuous operations allowed Ta A b HPSL a LP D HP HPS1 HPS2 Td1 EV3 Td2 Td3 STD1 INV SV2 C HPS3 STD2 SV3 Tce Tg B TL c EV2 EV1 Tg A: Discharge line maintenance valve B: Injection line maintenance valve C: Liquid stop valve D: Gas stop valve a, b, c: Service ports 1. Turn off the operation switch for the outdoor unit. After the outdoor unit has stopped, turn off the power supply for the outdoor unit. 2. Remove the control box. 3. Close the stop valves in the order: C and D. 4. Recover the refrigerant in the compressor through service ports c, b. ( shaped region.) 5. 6. 7. 8. Repair or replace the applicable parts. ∗ After replacing parts, check whether the dryer is WET or DRY using the moisture indicator. If it is WET, replace the dryer. Conduct air tight checks. Conduct vacuuming through the service port c and b. (Then charge the refrigerant according to the quantity as that recovered. And then continue vacuuming.) Turn on the power supply for the outdoor unit. Then turn on the operation switch for the outdoor unit. (If a remote controller switch is used, enable the remote setting.) Charge the refrigerant by the same quantity as that recovered. Air Cooled Refrigeration Condensing Unit 147 Troubleshooting SiENBE28-901 3) Maintenance 3: Maintenance of showcase and dryer Applicable parts 1 compressor • Main electronic expansion valve • Injection electronic expansion valve No continuous operations allowed HPSL D HPS1 A HP a Td1 b INV LP Tg C Tce B EV2 c TL EV1 A: Discharge line maintenance valve B: Injection line maintenance valve C: Liquid stop valve D: Gas stop valve a, b, c: Service ports 1. Close the stop valve C to conduct pump down operation. (The compressor will automatically stop or the pump down operation will be conducted for a period of 10 minutes.) 2. Turn off the operation switch for the outdoor unit. After the outdoor unit has stopped, turn off the power supply for the outdoor unit. 3. Remove the control box. 4. Close the stop valves in the order: C and D. 5. Recover the refrigerant in the compressor through the liquid stop valve C and gas stop valve D. ( shaped region.) Repair or replace the applicable parts. 6. Conduct air tight checks. 7. Conduct vacuuming through the liquid stop valve C and gas stop valve D. 8. Turn on the power supply for the outdoor unit. Then turn on the operation switch for the outdoor unit. (If a remote controller switch is used, enable the remote setting.) 9. Charge the refrigerant by the same quantity as that recovered with a charging cylinder. 148 Air Cooled Refrigeration Condensing Unit SiENBE28-901 Appendix (Supplementary Information) 7. Appendix (Supplementary Information) 7.1 Restriction Matter of Showcase • • • • The design pressure of the indoor unit must be 2.5MPa. Install an R410A mechanical thermostatic expansion valve on eachlindoor unit. Install an R410A solenoid valve (Max. operating differential pressure of 3.5 MPa (35 bars) or over) on the primary side of the mechanical thermostatic expansion valve described above for each indoor unit. Install a filter on the primary side of the solenoid valve described above for each indoor unit. Determine the filter mesh count based on the size specified by the solenoid valve and mechanical thermostatic expansion valve being used. Mechanical Liquid solenoid thermostatic expansion valve Filter Flow of refrigerant • Route the path to the indoor unit heat exchanger so that the flow or refrigerant is from top to bottom. Evaporator inlet Evaporator outlet Evaporator inlet Evaporator outlet Evaporator outlet • • 7.2 Evaporator inlet Wlhen installing a number of indoor units, be sure to install them at the same level. Difference in height between indoor units to be 5m or less. Use either off-cycle defrosting or electric heater defrosting as the defrostingltype. Hot-gas defrosting models cannot be used. Selection of Expansion Valve • • The expansion valve must use made of the Danfoss. EEV (On/Off switching electric expansion valve) cannot be used. Air Cooled Refrigeration Condensing Unit 149 150 5.2kg 3.2kg 1.4kg LT 4.9kg 4.1kg 3.5kg 3.0kg 2.3kg 1.7kg 1.2kg 0.6kg Blower coil *Note) 1. Case of showcase the condition of capacity (evaporating temperature) MT (Medium temperature): –10°C LT (Low temperature): –35°C 2. Case of blower coil, the condition of capacity is 10°C (Td). Amount of refrigerant kg Capacity of showcase kW + Amount of refrigerant kg Capacity of blower coil kW 40kW or more 11.0kg 5.5kg (3)Constant (4)By adjustment Add constant amount by outdoor unit model (When the liquid eye shows shortage of refrigerant.) Amount of Outdoor unit When test running, add refrigerant if the refrigerant liquid eye not be in sealing states at LRLEQ5, 6AY1•LRMEQ5, 6AY1 1.0kg cooling operation. LRLEQ8~12AY1•LRMEQ8~12AY1 3.0kg (4)By adjustment ≤ (2)By connecting showcase × 0.1 LRLEQ15~20AY1•LRMEQ15~20AY1 3.5kg Do not be over 10% of (2) amount by connecting showcase. 9.7kg From 35kW to less than 40kW 5.9kg From 20kW to less than 25kW 8.2kg 4.6kg From 15kW to less than 20kW 7.0kg 3.4kg From 10kW to less than 15kW From 30kW to less than 35kW 2.3kg From 25kW to less than 30kW 1.1kg From 5kW to less than 10kW MT Showcase Amount of refrigerant less than 5kW Capacity of showcase (*Note.) (2)By connecting showcase Please calculate from the capacity of the connected showcase as below tables. Total length of φ15.9 liquid pipes – kg kg A few bubbles flow. kg Bubbles come out at all times. Total amount of refrigerant (A)+(B) 3P251593-1A kg Manufacture's label value kg Charging amount (Factory set) (B) kg Total additional charging amount (A) (1)+(2)+ (3)+(4) Sealed state ({) Shortage of refrigerant (5) Full of liquid (4) Charging amount by adjustment (3) Constant (2) Charging amount by connecting showcase Charging amount Total length of Total length of – by piping length + φ12.7 liquid pipes – φ9.5 liquid pipes (m)×0.19 (m)×0.12 (m)×0.06 (1) kg Please calculate the amount of additional refrigerant charging as following method. (1)By piping length of system Please calculate from the total length of the liquid pipes. Calculate the total piping length of each size as follows. 7.3 *Be sure to fill the blanks, which are needed for after-sale services. Request for the indication of additional refrigerant charging amount and installation date Appendix (Supplementary Information) SiENBE28-901 Trouble Case with Present Machine (R-407C) Compressor damage due to the overcharge of refrigerant in the field Cause By mistake, a local installer added 1.3 times of the total refrigerant, not 1.3 times of the additional charging refrigerant which is specified in the Installation Manual. (It is already explained in the service news #MJ-08023. See the next page for more details.) Prevention of new models New models have improved compressor reliability by countermeasure control functions of current models. Also, the amount of the additional charging refrigerant at the field specified up to 0.1 times only. Air Cooled Refrigeration Condensing Unit SiENBE28-901 Appendix (Supplementary Information) Secret MJ–08023 <Convenience-pack> Re-precaution: Hard-and-fast additional refrigerant charge in commissioning PR Model LRLCP14D1, 2 and all other convenience-pack models This is to inform you again of the precaution (MJ06053) "For additional charge in a commissioning of Conveni-pack, the upper limit shall be 1.3 times as much as that calculated." Because there was a compressor failure caused by over charge that is assumed to be due to a miscalculation. [Case example] At the time of calculation of the upper limit of additional charge, "Initial charge in outdoor unit" was added. After the refrigerant was charged by the calculated upper limit above, the over charge "4.29kg (30% of 14.3kg of the initial charge in the outdoor unit)" caused the compressor failure. [Upper limit of additional refrigerant charge in commissioning] Correct Wrong [Additional charge in the field (Calculated value depending on piping length) ] × 1.3 [Charge at factory + Additional charge in the field (Calculated value depending on piping length) ] × 1.3 Example: Additional charge (Calculated value) :15kg The upper limit of additional charge : 19.5kg (15 × 1.3=19.5) [Precaution for charging refrigerant] For additional charge, please do not charge the upper limit of refrigerant at a time. When charging refrigerant more than additional charge in the field (calculated value), please charge refrigerant while observing through a sight glass. A few bubbles are not problem. So please keep strictly the upper limit of additional refrigerant charge (This unit performs an oil return irregularly by on-off operation of a solenoid valve. Some transiently-generated flashes during the solenoid valve operation are not problem.) When a solenoid valve is turned onin sealed condition → Flashes appear Even though a solenoid valve is turned off, flashes sometimes appear. Solenoid valve OFF (Sealed condition) Solenoid ON (Flashes appear) Air Cooled Refrigeration Condensing Unit Solenoid valve After OFF (Just before sealed condition) 151 Appendix (Supplementary Information) SiENBE28-901 Method of removed and replaced compressor in field This system’s compressor has gas injection pipe. When you replace the compressor, you must remove the piping fixture with gas injection pipe. Please follow the procedure, replace the compressor. Arrow view Gas injection pipe Method removed piping fixture for gas injection pipe (1) Insert the tool from behind the compressor, remove the hexagon head screw (A) and tube fixture (C).On the other screw (B), slacken it. Suction pipe (2) Turn the piping fixture on a point of tube holder (D), fold it toward. Discharge pipe (3) Cut the pipe for compressor with pipe-cutter. M5 Hexagon head screw (A) Turn the piping fixture Tube holder (C) Cutting point Piping fixture (stainless-steel) Tube holder (D) M5 Hexagon head screw (B) Tube holder (D) View Recommended tool for removed the screw Ratchet socket wrench Spanner Driver(+) Tool Expect the flat type 152 Only small size type Only short-shank type Air Cooled Refrigeration Condensing Unit SiENBE28-901 Appendix (Supplementary Information) Installation of alarm (Case example) Because the unit stopped abnormally, and the temperature in the storage had risen, goods preserved on the inside were deteriorated. (Cause) The abnormal stop occurred because of the problem of the unit, and they display the abnormal signal. However the distant location of the unit and lacking of the alarming system allow the damage spreads. Solution: The following matters must be accepted by the customer at installation. • Any secondary damage (such as deterioration and corrosion of the goods in the unit) is not covered by the manufacturer's warranty. • Temperature control is the responsibility of the customer. Please consider installing the alarming systems and spare units to minimize the damage. According to the circumstances, we recommend to arrange the damage insurance or after the sales service. The unit is provided with a terminal to output an alarm signal. If the system should malfunction and there is no alarm,the operation of the unit will be interrupted for a long time and damage to the commodities in storage may result. The installation of an alarm is recommended in order to take appropriate measures promptly in such cases. For details,consult your dealer. Air Cooled Refrigeration Condensing Unit 153 Appendix (Supplementary Information) 7.4 SiENBE28-901 Option List Series Model LRLEQ5AY1 LRLEQ6AY1 LRMEQ5AY1 LRMEQ6AY1 Option name Central drain pan kit KWC26C160 CONDENSING UNIT FOR REFRIGERATION SYSTEM LRLEQ5AY1E LRLEQ8AY1 LRLEQ8AY1E LRLEQ15AY1 LRLEQ6AY1E LRLEQ10AY1 LRLEQ10AY1E LRLEQ20AY1 LRLEQ12AY1 LRLEQ12AY1E LRLEQ15AY1E LRLEQ20AY1E LRMEQ5AY1E LRMEQ6AY1E LRMEQ8AY1 LRMEQ10AY1 LRMEQ12AY1 LRMEQ8AY1E LRMEQ15AY1 LRMEQ10AY1E LRMEQ20AY1 LRMEQ12AY1E LRMEQ15AY1E LRMEQ20AY1E HKWC26C160E KWC26C280 HKWC26C280E HKWC26C450E KWC26C450 Note) H: Order products 154 Air Cooled Refrigeration Condensing Unit Daikin Europe N.V. is approved by LRQA for its Quality Management System in accordance with the ISO9001 standard. ISO9001 pertains to quality assurance regarding design, development, manufacturing as well as to services related to the product. ISO14001 assures an effective environmental management system in order to help protect human health and the environment from the potential impact of our activities, products and services and to assist in maintaining and improving the quality of the environment. The present publication is drawn up by way of information only and does not constitute an offer binding upon Daikin Europe N.V.. Daikin Europe N.V. has compiled the content of this publication to the best of its knowledge. No express or implied warranty is given for the completeness, accuracy, reliability or fitness for particular purpose of its content and the products and services presented therein. Specifications are subject to change without prior notice. Daikin Europe N.V. explicitly rejects any liability for any direct or indirect damage, in the broadest sense, arising from or related to the use and/or interpretation of this publication. All content is copyrighted by Daikin Europe N.V.. Naamloze Vennootschap Zandvoordestraat 300 B-8400 Oostende - Belgium www.daikin.eu BE 0412 120 336 RPR Oostende SiENBE28-901 • 09/2009 • Copyright Daikin Daikin units comply with the European regulations that guarantee the safety of the product. VRV products are not within the scope of the Eurovent certification programme. q<R.7+.!"ist Prepared in Belgium by Lannoo (www.lannooprint.be), a company whose concern for the environmont is set in the EMAS and ISO 14001 systems. Responsible Editor: Daikin Europe N.V., Zandvoordestraat 300, B- 8400 Oostende Daikin’s unique position as a manufacturer of air conditioning equipment, compressors and refrigerants has led to its close involvement in environmental issues. For several years Daikin has had the intension to become a leader in the provision of products that have limited impact on the environment. This challenge demands the eco design and development of a wide range of products and an energy management system, resulting in energy conservation and a reduction of waste.