Download Mitsubishi Electric KA60VA Service manual
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OC321A.qxp 06.8.28 3:45 PM Page 1 SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS September 2006 No.OC321 REVISED EDITION-B TECHNICAL & SERVICE MANUAL Indoor unit [Model names] Revision: •RoHS PARTS LIST is added in REVISED EDITION-B. •Some descriptions have been modified. [Service Ref.] SEZ-KA35VA.TH SEZ-KA50VA.TH SEZ-KA60VA.TH SEZ-KA71VA.TH SEZ-KA35VA SEZ-KA50VA SEZ-KA60VA SEZ-KA71VA •Please void OC321 REVISED EDITION-A. Note: • This manual describes only service data of the indoor units.When servicing outdoor units, please refer to the service manual No.OC322, OC323 together with this manual. • RoHS compliant products have <G> mark on the spec name plate. • For servicing of RoHS compliant products, refer to the RoHS Parts List. CONTENTS Model name indication INDOOR UNIT TEMP. ON/OFF WIRED REMOTE CONTROLLER 1. PART NAMES AND FUNCTIONS ········2 2. SPECIFICATIONS·································4 3. OUTLINES AND DIMENSIONS············9 4. WIRING DIAGRAM·····························10 5. REFRIGERANT SYSTEM DIAGRAM·······11 6. TROUBLESHOOTING ························12 7. DISASSEMBLY PROCEDURE···········22 8. PARTS LIST········································25 9. RoHS PARTS LIST·····························27 10. OPTIONAL PARTS·····························29 OC321A.qxp 1 06.8.28 3:45 PM Page 2 PART NAMES AND FUNCTIONS Indoor Unit SEZ-KA35VA.TH SEZ-KA50VA.TH SEZ-KA60VA.TH SEZ-KA71VA.TH Air outlet Air outlet duct flange Air inlet (Selecting the either back side or bottom side) Wired remote controller Once the controls are set, the same operation mode can be repeated by simply pressing the ON/OFF button. ● Operation buttons Start/Stop button Set Temperature buttons Down Fan Speed button Up Timer Menu button (Monitor/Set button) Filter button (<return sign> button) Mode button (Return button) TEMP. ON/OFF Set Time buttons Service button (Clear button) Back Ahead Test Run button MENU BACK MONITOR/SET ON/OFF FILTER DAY CHECK TEST Airflow Up/Down button Timer On/Off button (Set Day button) PAR-21MAA OPERATION CLOCK CLEAR Louver button Operation button) ( To preceding operation number Opening the door Ventilation button Operation button) ( To next operation number 2 OC321A.qxp 06.8.28 3:45 PM Page 3 ● Display “Sensor” indication Displayed when the remote controller sensor is used. Day-of-Week For purposes of this explanation, all parts of the display are shown as lit. During actual operation, only the relevant items will be lit. Shows the current day of the week. Time/Timer Display “Locked” indicator Shows the current time, unless the simple or Auto Off timer is set. If the simple or Auto Off timer is set, shows the time remaining. Indicates that remote controller buttons have been locked. Identifies the current operation “Clean The Filter” indicator Shows the operating mode, etc. * Multilanguage display is supported. Comes on when it is time to clean the filter. TIME SUN MON TUE WED THU FRI SAT TIMER Hr ON AFTER FUNCTION FILTER ˚F˚C “Centrally Controlled” indicator Indicates that operation of the remote controller has been prohibited by a master controller. Timer indicators AFTER OFF ERROR CODE ˚F˚C The indicator comes on if the corresponding timer is set. WEEKLY SIMPLE AUTO OFF ONLY1Hr. Fan Speed indicator Shows the selected fan speed. “Timer Is Off” indicator Indicates that the timer is off. Temperature Setting Shows the target temperature. Up/Down Air Direction indicator Room Temperature display Shows the room temperature. The indicator shows the direction of the outcoming airflow. Louver display “One Hour Only” indicator Indicates the action of the swing louver. Does not appear if the louver is stationary. Displayed if the airflow is set to Low and downward during COOL or DRY mode. (Operation varies according to model.) The indicator goes off after one hour, at which time the airflow direction also changes. Ventilation indicator Appears when the unit is running in Ventilation mode. (Power On indicator) Indicates that the power is on. Caution ● Only the Power on indicator lights when the unit is stopped and power supplied to the unit. ● If you press a button for a feature that is not installed in the indoor unit, the remote controller will display the “Not Available” message. If you are using the remote controller to operate multiple indoor units, this message will appear only if the feature is not present at the parent unit. ● When power is turned ON for the first time, it is normal that “PLEASE WAIT” is displayed on the room temperature indication (For max. 2minutes). Please wait until this “PLEASE WAIT” indication disappears then start the operation. 3 OC321A.qxp 06.8.28 3:45 PM 2 Page 4 SPECIFICATIONS Indoor model SEZ-KA35VA.TH Function Cooling Electrical data Fan motor Special remarks K /h A A W A(kW) A Winding resistance (at20:) " Dimensions WoHoD Weight Air direction Sound level (High/Low) Fan speed (High/Low) Fan speed regulator External satatic pressure Thermistor TH1 (at 25:) Thermistor TH2 (at 25:) Thermistor TH5 (at 25:) mm kg dB(A) rpm Pa k" k" k" Cooling Heating Single phase 230V, 50Hz 780/600 10 0.40 60 — 0.22 PK6V19-EF Power supply Capacity Air flow (High/Low) Power outlet Running current ✽1 Power input Rated frequency Auxiliary heater Fan motor current ✽1 Model SEZ-KA50VA.TH Heating Single phase 230V, 50Hz 1020/720 20 0.55 80 — 0.27 PK6V32-EF WHT-BLK : 257 BLK-BLU : 20 BLU-YLW : 27 YLW-BRN : 14 BRN-RED : 51(at 26:) 1100o270o700 33.5 1 35/30 770/630 3 Std : 30 Max : 50 10 10 10 WHT-BLK : 166 BLK-BLU : 52 BLU-YLW : 19 YLW-BRN : 8 BRN-RED : 40(at 26:) 1100o270o700 33.5 1 39/31 840/640 3 Std : 30 Max : 50 10 10 10 NOTE : Test conditions are based on ISO 5151 Cooling : Indoor D.B. 27: W.B. 19: Outdoor D.B. 35: W.B. 24: Heating : Indoor D.B. 20: W.B. 15: Outdoor D.B. 7: W.B. 6: Refrigerant piping length (one way): 5m ✽1 Measured under rated operating frequency. Specifications and rating conditions of main electric parts INDOOR UNIT Item Model Indoor fan capacitor Fuse (C1) SEZ-KA35VA.TH SEZ-KA50VA.TH SEZ-KA60VA.TH SEZ-KA71VA.TH SEZ-KA35/50VA.TH : 2.5+ 440V SEZ-KA60VA.TH : 3.0+ 440V SEZ-KA71VA.TH : 4.0+ 440V (FUSE) Varistor Terminal block 250V 6.3A (ZNR) (TB) ERZV10D471 TO OUTDOOR UNIT : 3P Indoor fan motor thermal fuse TO WIRED REMOTE CONTROLLER : 2P 141:i3: 4 06.8.28 3:45 PM Page 5 Indoor model SEZ-KA60VA.TH Function Cooling Power supply Fan motor Electrical data Capacity Air flow (High/Low) Power outlet Running current ✽1 Power input Rated frequency Auxiliary heater Fan motor current ✽1 Model Special remarks OC321A.qxp Winding resistance Dimensions WoHoD Weight Air direction Sound level(High/Low) Fan speed(High/Low) Fan speed regulator External satatic pressure Thermistor TH1 (at 25:) Thermistor TH2 (at 25:) Thermistor TH5 (at 25:) K /h A A W A(kW) A " mm kg dB(A) rpm Pa k" k" k" Heating Single phase 230V, 50Hz 1200/720 20 0.65 100 — 0.39 PK6V50-EF WHT-BLK : 103 BLK-BLU : 57 BLU-YLW : 15 YLW-BRN : 7 BRN-RED : 29 (at 26:) 1100o270o700 33.5 1 43/32 890/660 3 Std : 30 Max : 50 10 10 10 NOTE : Test conditions are based on ISO 5151 Cooling : Indoor D.B. 27: W.B. 19: Outdoor D.B. 35: W.B. 24: Heating : Indoor D.B. 20: W.B. 15: Outdoor D.B. 7: W.B. 6: Refrigerant piping length (one way): 5m ✽1 Measured under rated operating frequency. 5 SEZ-KA71VA.TH Cooling Heating Single phase 230V, 50Hz 1200/720 20 0.60 130 — 0.51 PK4V60-EA WHT-BLK : 108 BLK-BLU : 29 BLU-YLW : 26 YLW-BRN : 14 BRN-RED : 34 (at 26:) 1100o270o700 35 1 43/32 1050/690 3 Std : 30 Max : 50 10 10 10 OC321A.qxp 06.8.28 3:45 PM Page 6 NOISE CRITERION CURVES <50Hz> <50Hz> SEZ-KA35VA.TH NOTCH SPL(dB) High 35 Low 30 LINE SEZ-KA50VA.TH 80 70 NC-70 60 NC-60 50 NC-50 40 NC-40 30 NC-30 APPROXIMATE TERESHOLD OF HEARING FOR CONTINUOUS NOISE NC-20 OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar) OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar) LINE 90 90 20 NOTCH SPL(dB) High 39 Low 31 80 70 NC-70 60 NC-60 50 NC-50 40 NC-40 30 NC-30 20 APPROXIMATE TERESHOLD OF HEARING FOR CONTINUOUS NOISE NC-20 10 10 63 125 250 500 1000 2000 4000 63 8000 125 250 500 1000 2000 4000 8000 BAND CENTER FREQUENCIES, Hz BAND CENTER FREQUENCIES, Hz <50Hz> SEZ-KA60VA.TH SEZ-KA71VA.TH NOTCH SPL(dB) High 43 Low 32 LINE OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar) 90 UNIT 80 70 NC-70 60 NC-60 External static pressure 30Pa 1.5m 50 NC-50 MICROPHONE 40 NC-40 30 NC-30 20 APPROXIMATE TERESHOLD OF HEARING FOR CONTINUOUS NOISE NC-20 10 63 125 250 500 1000 2000 4000 8000 BAND CENTER FREQUENCIES, Hz NOTE: The sound level is measured in an anechoic room where echoes are few, when compressor stops. The sound may be bigger than displayed level under actual installation condition by surrounding echoes. The sound level can be higher by about 2 dB than the displayed level during cooling and heating operation. 6 06.8.28 3:45 PM Page 7 INDOOR FAN PERFORMANCE AND CORRECTED AIR FLOW SEZ-KA35VA.TH Corrected Air flow Capacity Input Cooling 1.1 Correction factor Fan Performance Recommended range 60 0.9 0.8 1.3 40 20 0 1.0 5 10 15 20 25 20 25 Air flow (K/X) Correction factor External static pressure(Pa) (1Pa = 0.1mmAq) 80 5 7 10 15 20 25 Heating 1.2 1.1 1.0 0.9 Air flow (K/X) 0.8 5 10 15 Air flow (K/X) SEZ-KA50VA.TH Corrected Airflow Capacity Input Cooling Fan Performance Correction factor 1.1 Recommended range 80 60 1.0 0.9 0.8 5 10 15 20 25 20 25 Air flow (K/X) 40 1.2 0 Heating 1.1 20 5 10 15 20 Correction factor External static pressure(Pa) (1Pa = 0.1mmAq) OC321A.qxp 25 Air flow (K/X) 1.0 0.9 0.8 5 10 15 Air flow (K/X) 7 OC321A.qxp 06.8.28 3:45 PM Page 8 INDOOR FAN PERFORMANCE AND CORRECTED AIR FLOW SEZ-KA60VA.TH Corrected Air flow Capacity Input Cooling 1.1 Correction factor Fan Performance Recommended range 60 0.9 0.8 10 15 20 25 30 25 30 Air flow (K/X) 40 1.3 Correction factor External static pressure(Pa) (1Pa = 0.1mmAq) 80 1.0 20 0 5 10 15 20 25 Air flow (K/X) Heating 1.2 1.1 1.0 0.9 10 15 20 Air flow (K/X) SEZ-KA71VA.TH Corrected Air flow Capacity Input Cooling 1.1 Correction factor Fan Performance Recommended range 60 1.0 0.9 0.8 10 15 20 25 30 25 30 Air flow (K/X) 40 1.3 Correction factor External static pressure(Pa) (1Pa = 0.1mmAq) 80 20 0 5 10 15 20 25 Air flow (K/X) Heating 1.2 1.1 1.0 0.9 10 15 20 Air flow (K/X) 8 06.8.28 3:45 PM 3 Page 9 OUTLINES AND DIMENSIONS Unit : mm SEZ-KA35VA.TH SEZ-KA50VA.TH SEZ-KA60VA.TH SEZ-KA71VA.TH Air inlet (bottom side) dimensions 930 215 77 39 77.5 100 7x100=700 (Inlet size) Electrical parts box 930 (Inlet size) 215 Select the either back side or bottom side. 51 450 955 50 w Air inlet (rear side) 150 25 1016 240 27 50 PLATE (B) x 2 120 24-{2.9 holes 150 7x100=700 955 77.5 100 25 120 12.5 240 (Inlet size) 29 PLATE (A) After installation, remove the transportation support PLATE (B). 12.5 42 In case of bottom side suction, mount the PLATE (A) on the rear side. (Inlet size) Air inlet (rear side) dimensions Access door bolt pitch (10) 680 60 38 350 50 Suspension 700 600 24-{2.9 holes 1000 Service space (It is necessary to maintain a working service area from the ceiling.) 40 50 100 7x100=700 880 9 x 2-{2.9 holes Air outlet duct flange Air outlet 1070 Suspension bolt pitch 50 Wiring entry 20 32.5 100 (10) Terminal block Electrical parts box Air inlet (bottom side) Access door Air outlet duct flange 94 25 80 Electrical parts box Drain plug R1 (male) 350 Select the either back side or bottom side. Models SEZ-KA35VA SEZ-KA50VA SEZ-KA60VA SEZ-KA71VA 9 108 75 2x2-{2.9 holes 1100 w 25 Refrigerent pipe (liquid) 170 (Suspension bolt pitch) Refrigerent pipe (gas) 20 or more (1070) 30 Suspension bolt M10 or 3/8 (procure locally) 270 OC321A.qxp Refrigerent pipe (liquid) Refrigerent pipe (gas) {6.35mm {9.52mm flared connection 1/4F {6.35mm flared connection 1/4F {6.35mm flared connection 1/4F {9.52mm flared connection 3/8F flared connection 3/8F {12.7mm flared connection 1/2F {15.88mm flared connection 5/8F {15.88mm flared connection 5/8F OC321A.qxp 06.8.28 3:45 PM 4 Page 10 WIRING DIAGRAM SEZ-KA35VA.TH SEZ-KA50VA.TH SEZ-KA60VA.TH SEZ-KA71VA.TH MF TB4 BRN 3 4 5 6 7 8 TO OUTDOOR UNIT 1 2 3 4 5 6 7 8 BLU 2 YLW 1 ORN C1 BLU YLW BLK RED WHT ORN S1 S2 S3 RED P.B 1 2 3 AC220-240V CNSK(RED) KA60 ON OFF KA71 ON OFF 12345 2 3 4 5 6 12345 ORN BLU 3 BLU 1 WHT (FAN) FAN 7 RED WHT KA50 ON OFF 1 RED ON OFF BRN SW2 KA35 BLU BLK MODELS WHT <fig:w1> RED 1 (POWER BOARD) CNDK FUSE ORN (POWER) CND 3 1 I.B TRANS 3 BLU (CONTROL) CN3C 1 2 DC13.1V CN2S(WHT) 12345 X6 X5 ZNR X4 12345 X6 WHT (POWER BOARD) CN2D X4 SW3 ON OFF 1 2 BLK WHT LED3 12345 LED1 CN2L BLK RED (2 PHASE) (INTAKE) CN20 CN29 ON OFF 12345 1 2 1 2 CN90 CN41 CN51 CN32 See fig:w1 LED2 WHT (LIQUID) CN21 1 2 BLU (REMOCON) CN22 1 2 BLU SW2 BLU SWE ON OFF X5 TB15 1 2 TH5 [LEGEND] SYMBOL P.B NAME INDOOR POWER BOARD I.B SYMBOL C1 NAME CAPACITOR(FAN MOTOR) INDOOR CONTROLLER BOARD MF FAN MOTOR CN2L CONNECTOR(LOSSNAY) TB4 TERMINAL BLOCK(INDOOR/OUTDOOR CONNECTING LINE) CN32 CONNECTOR(REMOTE SWITCH) CN41 CONNECTOR(HA TERMINAL-A) CN51 CENTRALLY CONTROL CN90 CONNECTOR(WIRELESS) FUSE FUSE(T6.3AL250V) LED1 POWER SUPPLY(I.B) LED2 POWER SUPPLY(I.B) LED3 TRANSMISSION(INDOOR-OUTDOOR) SW2 SWITCH(CAPACITY CODE) SW3 SWITCH(MODE SELECTION) SWE SWITCH(EMERGENCY OPERATION) X4 RELAY(FAN MOTOR LL) X5 RELAY(FAN MOTOR Lo) X6 RELAY(FAN MOTOR Hi) ZNR VARISTOR TERMINAL BLOCK(REMOTE CONTROLLER TB15 TRANSMISSION LINE) ROOM TEMP.THERMISTOR TH1 (0°C/15kΩ,25°C/5.4kΩ DETECT) PIPE TEMP.THERMISTOR/LIQUID TH2 (0°C/15kΩ,25°C/5.4kΩ DETECT) COND./EVA.TEMP.THERMISTOR TH5 (0°C/15kΩ,25°C/5.4kΩ DETECT) NOTES: 1.Since the outdoor side electric wiring may change be sure to check the outdoor unit electric wiring for servicing. 2.Indoor and outdoor connecting wires are made with polarities,make wiring matching terminal numbers(S1,S2,S3). 3.Symbols used in wiring diagram above are, :Connector, :Terminal(block). 4.Since the indoor fan motor(MF) is connected with 50Hz power, if 60Hz power is used, change the wiring connection shown in fig:w2. <fig:w2> Indoor Fan Motor(MF) for 60Hz BLUE 50 YELLOW 60 BLUE wFor details on how to operate self-diagnosis, refer to the technical manuals etc. 10 TH1 TH2 } TO MA-REMOTE CONTROLLER DC8.7-13V OC321A.qxp 06.8.28 3:45 PM 5 Page 11 REFRIGERANT SYSTEM DIAGRAM SEZ-KA35VA.TH SEZ-KA50VA.TH SEZ-KA60VA.TH SEZ-KA71VA.TH Strainer #50 Heat exchanger Refrigerant GAS pipe connection (Flare) Condenser/evaporator temperature thermistor (TH5) Refrigerant flow in cooling Refrigerant flow in heating Refrigerant LIQUID pipe connection (Flare) Pipe temperature thermistor/liquid (TH2) Room temperature thermistor (TH1) Distributor with strainer #50 Strainer #50 11 OC321A.qxp 06.8.28 3:45 PM Page 19 6-5. TEST POINT DIAGRAM 6-5-1. Indoor power board SEZ-KA35VA.TH SEZ-KA50VA.TH SEZ-KA60VA.TH SEZ-KA71VA.TH CN2S Connect to the indoor controller board (CN2D) 1 (+)) between 1 to 3 12.6-13.7V DC (Pin1 CNSK Connect to the indoor controller board (CNDK) between 1 to 3 220-240V AC 19 OC321A.qxp 06.8.28 3:45 PM Page 20 6-5-2. Indoor controller board LED1 Power supply LED2 Power supply (I.B) (R.B) LED3 Transmission (Indoor/outdoor) } – + CN3C Transmission (Indoor/outdoor) (0~24V DC) CN2D Connector to the indoor power board (CN2S) (12.5~13.7V DC) + SEZ-KA35VA.TH SEZ-KA50VA.TH SEZ-KA60VA.TH SEZ-KA71VA.TH Non polarity – CND Power supply input (220~240V AC) CN22 Remote controller connecting wire (10.4~14.6V DC) CN20 Room temperature thermistor (TH1) } CN21 Pipe temperature thermistor/Liquid (TH2) FUSE (6.3A 250V) CNDK Connect to the indoor power board (CNSK) (220~240V AC) CN29 Condenser/evaporator temperature thermistor (TH5) CN41 Connector (HA terminal-A) CN51 Centrally control CN2L Connector (LOSSNAY) FAN Fan motor output Jumper connector J11~J15 Unit setting SW3 SWE Mode selection Emergency operation 20 SW2 Capacity setting OC321A.qxp 06.8.28 3:45 PM Page 21 6-6. TROUBLE CRITERION OF MAIN PARTS SEZ-KA35VA.TH SEZ-KA50VA.TH SEZ-KA60VA.TH SEZ-KA71VA.TH Part name Check method and criterion Room temperature thermistor (TH1) Measure the resistance with a tester. (Part temperature 10°C ~ 30°C) Pipe temperature thermistor/liquid (TH2) Condenser/evaporator temperature thermistor (TH5) Normal Abnormal 8kΩ~20kΩ Opened or short-circuited Measure the resistance between the terminals with a tester. (Coil wiring temperature 10°C ~ 30°C) Indoor fan motor (MF) Normal P BLK BLU YLW BRN RED ORN WHT P : Thermal fuse KA35VA KA50VA KA60VA KA71VA GRN WHT-BLK 270~244Ω 157~175Ω 97~109Ω 103~113Ω YLW BLK-BLU 19~21Ω 49~55Ω 54~60Ω 28~30Ω BLU-YLW 25~29Ω 18~20Ω 14~16Ω 25~27Ω YLW-BRN 13~15Ω 7~9Ω 6~8Ω 13~15Ω BRN-RED 48~54Ω 38~42Ω 27~31Ω 32~36Ω 141 ± 3˚C 21 Abnormal Opened or short-circuited OC321A.qxp 7 06.8.28 3:45 PM Page 22 DISASSEMBLY PROCEDURE SEZ-KA35VA.TH SEZ-KA50VA.TH SEZ-KA60VA.TH SEZ-KA71VA.TH OPERATING PROCEDURE PHOTOS 1. Removing the electrical parts (1) Remove 2 screws of electrical cover and electrical parts cover. (See Photo 1) ● Indoor controller board (I.B) ● Terminal block (TB4,TB15) ● Indoor power board (P.B) ● Fan motor capacitor (C1) (See Photo 2) Photo 1 Service panel (Pipe temperature thermistor / liquid) Electrical parts cover Drain pan Set screws Service panel Front panel Set screws (Condenser / evaporator temperature thermistor) (for drain pan) 2. Removing the pipe temperature thermistor (TH2) Photo 2 Terminal Terminal block (TB15) block (TB4) Indoor controller box (1) Remove the electrical parts cover. (Refer to 1) (2) Remove 2 screws of service panel and service panel. (See Photo 3) (3) Remove the thermistor (TH2) from the holder. (See Photo 4) (4) Remove the connector (CN21) from the indoor controller board and pull the white wire of thermistor (TH2) out. Fan motor capacitor 3. Removing the condenser / evaporator temperature thermistor (TH5) (1) Remove the electrical parts cover. (Refer to 1) (2) Remove the service panel. (See Photo 3) (3) Remove the thermistor (TH5) from the holder. (See Photo 4) (4) Remove the connector (CN29) from the indoor controller board and pull the black wire of thermistor (TH5) out. Indoor controller board Indoor power board Photo 4 Photo 3 Screws Pipe temperature thermistor / liquid (TH2) Service panel Screws 22 Condenser / evaporator temperature thermistor (TH5) OC321A.qxp 06.8.28 3:45 PM Page 23 PHOTOS OPERATING PROCEDURE 4. Removing the room temperature thermistor (TH1) Photo 5 (1) Remove the electrical parts cover. (Refer to 1) (2) Remove 12 screws of front panel and the front panel at fan side. (See Photo 1) (3) Remove the thermistor (TH1) from the separator panel. (See Photo 6) (4) Disconnect the connector (CN20)from the indoor controller board and pull the lead wire of thermistor (TH1) out. Claws Claws Photo 6 Motor bands Screws Room temperature thermistor (TH1) 5. Removing the sirocco fan and the fan motor (MF). (1) Remove the electrical parts cover. (Refer to 1) (2) Remove 12 screws of front panel and the front panel at fan side. (See Photo 1) (3) Disconnect the connector of the fan motor lead wire. (See Photo 2) (4) Undo the 4 claws and remove the fan claws.(down side) <Either left or right> (See Photo 5) (5) Remove the motor bands. <A screw each on left and right.> (See Photo 5) (6) Disconnect the earth wire from the fan motor leg. (See Photo 7) (7) Remove the fan motor and the sirocco fan by assembly. (See Photo 7) (8) Unscrew set screw and remove the sirocco fan. <Either left or right> (See Photo 7) Photo 7 Set screw Earth wire 23 Fan motor Separator panel Fan casing Fan motor Fan casing OC321A.qxp 06.8.28 3:45 PM Page 24 PHOTOS OPERATING PROCEDURE 6. Removing the drain pan (1) Unscrew each set screw on the right and left, and remove the drain pan pushing it toward the the back. (See Photo 1) Photo 8 Screws 7. Removing the heat exchanger (1) Remove the drain pan. (Refer to 6) (2) Remove the 16 screws and the Under flange at heat exchanger side. (See Photo 8) (3) Remove the 4 screws of heat exchanger.( 2 screws each on left and right) (See Photo 9) (4) Remove the thermistor (TH2) from the holder. (Refer to 2) (5) Remove the thermistor (TH5) from the holder. (Refer to 3) (6) Remove the 3 screws and the service panel. (See Photo 9) (7) Put the heat exchanger down to the fan motor and pull it toward you. (See Photo 9) Under flange Photo 9 Screws for heat exchanger Service panel Heat exchanger 24 Screws for service panel OC321A.qxp 06.8.28 3:45 PM 8 Page 25 PARTS LIST (non-RoHS compliant) INDOOR UNIT STRUCTURAL PARTS SEZ-KA35VA.TH SEZ-KA50VA.TH SEZ-KA60VA.TH SEZ-KA71VA.TH 15 14 12 13 11 1 10 2 3 9 8 7 4 6 5 Q'ty/set No. Parts No. Parts name Specification SEZ-KA·VA.TH 35 50 60 71 1 E07 039 086 LEFT SIDE PANEL 1 1 1 1 2 E07 039 500 SIROCCO FAN 2 2 2 2 3 E02 179 505 FAN MOTOR RUBBER MOUNT 2 2 2 2 E07 039 300 FAN MOTOR 4 E07 040 300 FAN MOTOR PK6V19-EF 1 PK6V50-EF E07 223 300 FAN MOTOR PK4V60-EA <2PCS/SET> MF 1 PK6V32-EF E07 041 300 FAN MOTOR Price Wiring RecomRemarks Diagram mended (Drawing No.) Symbol Q'ty Unit Amount MF 1 MF 1 MF TH1 5 E07 159 308 ROOM TEMPERATURE THERMISTOR 1 1 1 1 6 E07 039 000 FRONT PANEL 1 1 1 1 7 E07 039 700 DRAIN PAN 1 1 1 1 CONDENSER / EVAPORATOR TEMPERATURE THERMISTOR 1 1 1 1 TH5 9 E07 159 307 PIPE TEMPERATURE THERMISTOR / LIQUID 1 1 1 1 TH2 8 E07 154 309 E07 143 620 INDOOR HEAT EXCHANGER 10 1 E07 144 620 INDOOR HEAT EXCHANGER 1 E07 145 620 INDOOR HEAT EXCHANGER 1 E07 223 620 INDOOR HEAT EXCHANGER 1 11 E07 039 808 RIGHT LEG 2 2 2 2 12 E07 143 085 RIGHT SIDE PANEL 1 1 1 1 13 E07 143 293 SEPARATOR ASSY 1 1 1 1 14 E07 039 809 LEFT LEG 2 2 2 2 15 E07 039 290 BASE 1 1 1 1 25 OC321A.qxp 06.8.28 3:45 PM Page 26 INDOOR UNIT ELECTRICAL PARTS SEZ-KA35VA.TH SEZ-KA50VA.TH SEZ-KA60VA.TH SEZ-KA71VA.TH 6 5 TEMP. ON/OFF 1 2 TO REMOTE CONTROLLER 7 8 S1 S2 TO OUTDOOR UNIT 4 S3 9 3 1 2 Part numbers that is circled is not shown in the figure. Q'ty/set No. Parts No. Parts name Specification SEZ-KA·VA.TH 35 E07 159 447 INDOOR CONTROLLER BOARD 1 50 60 1 E07 160 447 INDOOR CONTROLLER BOARD I.B 1 E07 161 447 INDOOR CONTROLLER BOARD I.B 1 E07 223 447 INDOOR CONTROLLER BOARD 2 E02 661 385 VARISTOR 3 E07 006 382 FUSE 71 250V/6.3A 4 E07 154 440 INDOOR POWER BOARD E02 063 351 FAN MOTOR CAPACITOR 2.5+/440VAC Price Wiring RecomRemarks Diagram mended Unit Amount (Drawing No.) Symbol Q'ty I.B 1 I.B 1 1 1 1 ZNR 1 1 1 1 FUSE 1 1 1 1 P.B 1 1 5 E02 138 351 FAN MOTOR CAPACITOR 3.0+/440VAC C1 1 E02 064 351 FAN MOTOR CAPACITOR 4.0+/440VAC C1 1 C1 6 E07 156 375 TERMINAL BLOCK 2P 1 1 1 1 TB15 7 E07 162 375 TERMINAL BLOCK 3P 1 1 1 1 TB4 8 E07 159 426 REMOTE CONTROLLER 1 1 1 1 R.B 9 E07 018 089 REMOTE CONTROLLER CABLE 1 1 1 1 10 E07 039 449 CONTROLLER COVER 1 1 1 1 26 06.8.28 3:45 PM 9 Page 27 RoHS PARTS LIST INDOOR UNIT STRUCTURAL PARTS SEZ-KA35VA.TH SEZ-KA50VA.TH SEZ-KA60VA.TH SEZ-KA71VA.TH 15 14 12 13 11 1 10 2 3 9 8 7 No. 6 5 4 RoHS OC321A.qxp Q'ty/set Parts No. Parts name Specification SEZ-KA·VA.TH 35 50 60 71 1 G E17 039 086 LEFT SIDE PANEL 1 1 1 1 2 G E17 039 500 SIROCCO FAN 2 2 2 2 3 G E12 179 505 FAN MOTOR RUBBER MOUNT 2 2 2 2 4 G E17 039 300 FAN MOTOR PK6V19-EF G E17 040 300 FAN MOTOR PK6V32-EF G E17 041 300 FAN MOTOR PK6V50-EF G E17 223 300 FAN MOTOR PK4V60-EA 1 1 MF 1 MF 1 1 TH1 1 1 1 1 1 1 1 1 1 1 TH5 1 1 1 1 TH2 1 1 1 7 G E17 039 700 DRAIN PAN 1 CONDENSER / EVAPORATOR TEMPERATURE THERMISTOR 9 G E17 159 307 PIPE TEMPERATURE THERMISTOR / LIQUID 10 MF 1 6 G E17 039 000 FRONT PANEL G E17 143 620 INDOOR HEAT EXCHANGER <2PCS/SET> MF 5 G E17 159 308 ROOM TEMPERATURE THERMISTOR 8 G E17 154 309 Price Wiring RecomRemarks Diagram mended (Drawing No.) Symbol Q'ty Unit Amount 1 G E17 144 620 INDOOR HEAT EXCHANGER 1 G E17 145 620 INDOOR HEAT EXCHANGER 1 G E17 223 620 INDOOR HEAT EXCHANGER 1 11 G E17 039 808 RIGHT LEG 2 2 2 2 12 G E17 143 085 RIGHT SIDE PANEL 1 1 1 1 13 G E17 143 293 SEPARATOR ASSY 1 1 1 1 14 G E17 039 809 LEFT LEG 2 2 2 2 15 G E17 039 290 BASE 1 1 1 1 27 OC321A.qxp 06.8.28 3:45 PM Page 28 INDOOR UNIT ELECTRICAL PARTS SEZ-KA35VA.TH SEZ-KA50VA.TH SEZ-KA60VA.TH SEZ-KA71VA.TH 6 5 TEMP. ON/OFF 1 2 TO REMOTE CONTROLLER 7 8 S1 S2 TO OUTDOOR UNIT 4 S3 9 3 1 2 No. RoHS Part numbers that is circled is not shown in the figure. Q'ty/set Parts No. Parts name Specification 35 G E17 159 447 INDOOR CONTROLLER BOARD 1 SEZ-KA·VA.TH 50 60 G E17 160 447 INDOOR CONTROLLER BOARD I.B 1 G E17 161 447 INDOOR CONTROLLER BOARD I.B 1 G E17 223 447 INDOOR CONTROLLER BOARD 2 G E12 661 385 VARISTOR 3 G E17 006 382 FUSE 71 1 250V/6.3A 4 G E17 154 440 INDOOR POWER BOARD G E12 063 351 FAN MOTOR CAPACITOR 2.5+/440VAC Price Wiring RecomRemarks Diagram mended Unit Amount (Drawing No.) Symbol Q'ty I.B 1 I.B 1 1 1 1 ZNR 1 1 1 1 FUSE 1 1 1 1 P.B 1 1 5 G E12 138 351 FAN MOTOR CAPACITOR 3.0+/440VAC C1 1 G E12 064 351 FAN MOTOR CAPACITOR 4.0+/440VAC C1 1 C1 6 G E17 156 375 TERMINAL BLOCK 2P 1 1 1 1 TB15 7 G E17 162 375 TERMINAL BLOCK 3P 1 1 1 1 TB4 8 G E17 159 426 REMOTE CONTROLLER 1 1 1 1 R.B 9 G E17 018 089 REMOTE CONTROLLER CABLE 1 1 1 1 10 G E17 039 449 CONTROLLER COVER 1 1 1 1 28 OC321A.qxp 06.8.28 3:45 PM 10 Page 29 OPTIONAL PARTS AIR FILTER Models Applied unit SEZ-KA35VA.TH SEZ-KA50VA.TH SEZ-KA60VA.TH SEZ-KA71VA.TH PAC - 1000 FT 29 OC321A.qxp 06.8.28 3:45 PM Page 30 30 OC321A.qxp 06.8.28 3:45 PM Page 31 31 OC321A.qxp 06.8.28 3:45 PM Page 32 TM HEAD OFFICE : TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN CCopyright 2005 MITSUBISHI ELECTRIC ENGINEERING CO., LTD. Distributed in Sep. 2006 No.OC321 REVISED EDITION-B PDF 7 Distributed in Oct. 2005 No.OC321 REVISED EDITION-A PDF 8 Distributed in Feb. 2005 No.OC321 PDF 8 Made in Japan New publication, effective Sep. 2006 Specifications subject to change without notice.