Download Mitsubishi Electric MXZ-18NV Service manual
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Revision: SPLIT-TYPE,HEAT PUMP AIR CONDITIONERS ●MXZ-18NV- E1 and MXZ-18NV- E2 have been added. ●Page layout has been changed. ●Performance curves has been modified. ●The graph of the outdoor low pressure in the HEAT operation of the PERFORMANCE CURVE of MXZ32NV was deleted. ●Please void OB185 REVISED EDITION A and B. No. OB185 REVISED EDITION C SERVICE MANUAL Inverter-controlled multi system Models MXZ-18NV MXZ-32NV MXZ-18NV MXZ-32NV - E1 E1 E2 E2 CONTENTS MXZ-32NV Model indication 1. TECHNICAL CHANGES ····································2 2. PART NAMES AND FUNCTIONS······················2 3. INDOOR /OUTDOOR CORRESPONDENCE TABLE··········3 4. INDOOR UNITS COMBINATION ·······················4 5. SPECIFICATION·················································9 6. OUTLINES AND DIMENSIONS························11 7. WIRING DIAGRAM ··········································13 8. REFRIGERANT SYSTEM DIAGRAM ··············15 9. PERFORMANCE CURVES ······························20 10. MICROPROCESSOR CONTROL ····················30 11. TROUBLESHOOTING ······································39 12. DISASSEMBLY INSTRUCTIONS·····················53 13. PARTS LIST······················································57 14. OPTIONAL PARTS ····································BACK This manual describes technical data of outdoor unit. For indoor unit refer to the service manuals No.OB207 and OB196 REVISED EDITION A of corresponding models. 1 TECHNICAL CHANGES MXZ-18LV- E1 →MXZ-18NV- E1 1. Inverter assembly has changed. 2. Gas pipe thermistors were added. 3. H.P.S. has changed. MXZ-18NV- E1 →MXZ-18NV- E2 1. MSH-07NV- E2 and MSH-12NV- E2 has been added to the combination of the connectable indoor units. 2. Outdoor unit electronic control P.C. board has changed. 3. The outdoor fan speed control has changed.(HEAT mode single operation : Lo → Hi) MXZ-32AV- E2 →MXZ-32NV- E1 1. The desital display self-diagnosis function has adopted. 2. The desorption method of LEV has changed the screw method to the one touch method. 3. The position of the electronical parts has changed. 4. The chargeless system has adopted. 5. The scroll compressor has adopted. 6. The micro control P.C.board has simplifed. 7. The fan speed level has becomed 3 levels (Hi / Me / Lo). 8. The low pressure switch has adopted . 9. The ditection of connector deviation has becomed easily. MXZ-32NV- E1 →MXZ-32NV- E2 1. MCFH-13NV- E2 and MCFH-18NV- 2 E2 has been added to the combination of the connectable indoor units. PART NAMES AND FUNCTION Outdoor unit MXZ-18NV (back and side) Air inlet Piping Drainage hose Air outlet Drain outlet Air intake Located on the back and the left side. MXZ-32NV Air in Model indication Air out Air outlet 2 3 INDOOR / OUTDOOR CORRESPONDENCE TABLE MXZ-18NV OUTDOOR UNIT MXZ-18NV- E1 MXZ-18NV- E2 09+09 09+09 - 07+12 MXZ-32NV Combination of the connectable indoor units OUTDOOR UNIT MXZ-32NV- E1 MXZ-32NV- E2 07+07+07 07+07+07 07+07+09 07+07+09 07+07+12 07+07+(12 or 13) 07+07+18 07+07+18 07+09+09 07+09+09 07+09+12 07+09+(12 or 13) 07+09+18 07+09+18 07+12+12 07+(12 or 13)+(12 or 13) 07+12+18 07+(12 or 13)+18 07+18+18 07+18+18 09+09+09 09+09+09 09+09+12 09+09+(12 or 13) 09+09+18 09+09+18 09+12+12 09+(12 or 13)+(12 or 13) 09+12+18 09+(12 or 13)+18 09+18+18 09+18+18 12+12+12 (12 or 13)+(12 or 13)+(12 or 13) 12+12+18 (12 or 13)+(12 or 13)+18 07+07+07+07 07+07+07+07 07+07+07+09 07+07+07+09 07+07+07+12 07+07+07+(12 or 13) 07+07+07+18 07+07+07+18 07+07+09+09 07+07+09+09 07+07+09+12 07+07+09+(12 or 13) 07+07+09+18 07+07+09+18 07+07+12+12 07+07+(12 or 13)+(12 or 13) 07+07+12+18 07+07+(12 or 13)+18 07+09+09+09 07+09+09+09 07+09+09+12 07+09+09+(12 or 13) 07+09+09+18 07+09+09+18 07+09+12+12 07+09+(12 or 13)+(12 or 13) 09+09+09+09 09+09+09+09 09+09+09+12 09+09+09+(12 or 13) 09+09+09+18 09+09+09+18 09+09+12+12 09+09+(12 or 13)+(12 or 13) ❈There is no combination other than this table. 3 4 INDOOR UNITS COMBINATION MXZ-18NV Indoor units combination Total Outdoor unit power consumption (kW) 2.3 (1.6 - 2.8) 2.5 (1.7 - 3.0) 3.4 (1.8 - 3.8) 4.5 (2.0 - 4.5) 4.5 (1.9 - 4.5) 1.02 (0.855 - 1.33) 1.05 (0.855 - 1.36) 1.45 (0.855 - 1.63) 2.00 (0.91- 2.00) 2.00 (0.91 - 2.00) Cooling capacity (kW) Unit A Unit B 07 2.3 - 09 2.5 - 12 3.4 - 07+12 2.0 2.5 09+09 2.25 2.25 Indoor units combination 4 NOTE:Electrical data is for outdoor unit only. Total Outdoor unit power consumption (kW) 3.3 (2.0 - 4.0) 3.6 (2.0 - 4.5) 4.0 (2.2 - 4.7) 5.8 (2.1 - 5.8) 5.8 (2.0 - 5.8) 1.45 (0.69 - 1.60) 1.47 (0.69 - 1.62) 1.63 (0.69 - 1.69) 1.785 (0.69 - 1.785) 1.785 (0.69 - 1.785) Heating capacity (kW) Unit A Unit B 07 3.3 - 09 3.6 - 12 4.0 - 07+12 2.7 3.1 09+09 2.9 2.9 Current (A) 220V 240V Power factor (%) 5.20 4.72 89 - 90 5.36 4.86 89 - 90 7.40 6.71 89 - 90 10.21 9.26 89 - 90 10.21 9.26 89 - 90 Current (A) 220V 240V Power factor (%) 7.40 6.71 89 - 90 7.50 6.80 89 - 90 8.32 7.54 89 - 90 9.02 8.26 90 - 90 9.02 8.26 90 - 90 MXZ-32NV NOTE: Electrical data is for outdoor unit only. Heating capacity (kw) Outdoor unit power consumption (kw) Current (A) 220V 240V Power factor (%) Indoor units combination Unit A Unit B Unit C Unit D Total 07 2.2 - - - 2.2 (1.8-2.7) 1.00 (0.96-1.14) 5.05 4.63 90 09 2.8 - - - 2.8 (1.8-3.2) 1.77 (0.96-1.36) 5.91 5.42 90 12(13) 4.0 - - - 4.0 (2.2-4.5) 1.42 (1.00-1.63) 7.17 6.57 90 18 5.0 - - - 5.0 (2.2-5.4) 1.84 (1.00-1.99) 9.29 8.52 90 07+07 2.2 2.2 - - 4.4 (3.0-5.4) 1.63 (1.30-2.03) 8.23 7.55 90 07+09 2.2 2.8 - - 5.0 (3.0-6.0) 1.88 (1.30-2.23) 9.49 8.70 90 07+12(13) 2.2 4.0 - - 6.2 (3.0-7.2) 2.38 (1.30-2.98) 12.02 11.09 90 07+18 2.2 5.0 - - 7.2 (3.0-7.6) 2.74 (1.30-2.98) 13.84 12.69 90 09+09 2.8 2.8 - - 5.6 (3.0-6.4) 2.13 (1.30-2.43) 10.76 9.86 90 09+12(13) 2.8 4.0 - - 6.8 (3.0-7.6) 2.63 (1.30-2.88) 12.18 12.18 90 09+18 2.8 5.0 - - 7.8 (3.0-8.6) 3.29 (1.30-3.60) 16.62 15.23 90 12(13)+12(13) 4.0 4.0 - - 8.0 (3.0-8.8) 3.38 (1.30-3.60) 17.07 15.65 90 12(13)+18 3.5 4.5 - - 8.0 (3.0-8.8) 3.38 (1.30-3.60) 17.07 15.65 90 18+18 4.0 4.0 - - 8.0 (3.0-8.8) 3.38 (1.30-3.60) 17.07 15.65 90 07+07+07 2.2 2.2 2.2 - 6.6 (3.7-8.1) 3.23 (1.30-3.96) 17.07 15.65 90 07+07+09 2.2 2.2 2.8 - 7.2 (3.7-8.5) 3.23 (1.30-3.96) 16.31 14.95 90 07+07+12(13) 2.1 2.1 3.8 - 8.0 (3.7-9.0) 3.23 (1.30-3.96) 16.31 14.95 90 07+07+18 1.9 1.9 4.2 - 8.0 (3.7-9.0) 3.23 (1.30-3.96) 16.31 14.95 90 07+09+09 2.2 2.8 2.8 - 7.8 (3.7-8.8) 3.23 (1.30-3.96) 16.31 14.95 90 07+09+12(13) 1.9 2.5 3.6 - 8.0 (3.7-9.0) 3.23 (1.30-3.96) 16.31 14.95 90 07+09+18 1.7 2.3 4.0 - 8.0 (3.7-9.0) 3.23 (1.30-3.96) 16.31 14.95 90 07+12(13)+12(13) 1.8 3.1 3.1 - 8.0 (3.7-9.0) 3.23 (1.30-3.96) 16.31 14.95 90 07+12(13)+18 1.6 2.8 3.6 - 8.0 (3.7-9.0) 3.23 (1.30-3.96) 16.31 14.95 90 07+18+18 1.5 3.25 3.25 - 8.0 (3.7-9.0) 3.23 (1.30-3.96) 16.31 14.95 90 5 NOTE: Electrical data is for outdoor unit only. Heating capacity (kw) Outdoor unit power consumption (kw) Current (A) 220V 240V Power factor (%) 8.0 (3.7-9.0) 3.23 (1.30-3.96) 16.31 14.95 90 - 8.0 (3.7-9.0) 3.23 (1.30-3.96) 16.31 14.95 90 3.8 - 8.0 (3.7-9.0) 3.23 (1.30-3.96) 16.31 14.95 90 3.0 3.0 - 8.0 (3.7-9.0) 3.23 (1.30-3.96) 16.31 14.95 90 1.9 2.7 3.4 - 8.0 (3.7-9.0) 3.23 (1.30-3.96) 16.31 14.95 90 09+18+18 1.8 3.1 3.1 - 8.0 (3.7-9.0) 3.23 (1.30-3.96) 16.31 14.95 90 12(13)+12(13) +12(13) 2.67 2.67 2.67 - 8.0 (3.7-9.0) 3.23 (1.30-3.96) 16.31 14.95 90 12(13)+12(13)+18 2.45 2.45 3.1 - 8.0 (3.7-9.0) 3.23 (1.30-3.96) 16.31 14.95 90 07+07+07+07 2.0 2.0 2.0 2.0 8.0 (3.7-9.0) 3.23 (1.30-3.96) 16.31 14.95 90 07+07+07+09 1.87 1.87 1.87 2.4 8.0 (3.7-9.0) 3.23 (1.30-3.96) 16.31 14.95 90 07+07+07+12(13) 1.7 1.7 1.7 2.9 8.0 (3.7-9.0) 3.23 (1.30-3.96) 16.31 14.95 90 07+07+07+18 1.5 1.5 1.5 3.5 8.0 (3.7-9.0) 3.23 (1.30-3.96) 16.31 14.95 90 07+07+09+09 1.8 1.8 2.2 2.2 8.0 (3.7-9.0) 3.23 (1.30-3.96) 16.31 14.95 90 07+07+09+12(13) 1.6 1.6 2.0 2.8 8.0 (3.7-9.0) 3.23 (1.30-3.96) 16.31 14.95 90 07+07+09+18 1.5 1.5 1.8 3.2 8.0 (3.7-9.0) 3.23 (1.30-3.96) 16.31 14.95 90 07+07+12(13) +12(13) 1.4 1.4 2.6 2.6 8.0 (3.7-9.0) 3.23 (1.30-3.96) 16.31 14.95 90 07+07+12(13)+18 1.3 1.3 2.4 3.0 8.0 (3.7-9.0) 3.23 (1.30-3.96) 16.31 14.95 90 07+09+09+09 1.7 2.1 2.1 2.1 8.0 (3.7-9.0) 3.23 (1.30-3.96) 16.31 14.95 90 07+09+09+12(13) 1.5 1.9 1.9 2.7 8.0 (3.7-9.0) 3.23 (1.30-3.96) 16.31 14.95 90 07+09+09+18 1.4 1.75 1.75 3.1 8.0 (3.7-9.0) 3.23 (1.30-3.96) 16.31 14.95 90 07+09+12(13) +12(13) 1.35 1.75 2.45 2.45 8.0 (3.7-9.0) 3.23 (1.30-3.96) 16.31 14.95 90 09+09+09+09 2.0 2.0 2.0 2.0 8.0 (3.7-9.0) 3.23 (1.30-3.96) 16.31 14.95 90 09+09+09+12(13) 1.8 1.8 1.8 2.6 8.0 (3.7-9.0) 3.23 (1.30-3.96) 16.31 14.95 90 09+09+09+18 1.67 1.67 1.67 3.0 8.0 (3.7-9.0) 3.23 (1.30-3.96) 16.31 14.95 90 09+09+12(13) +12(13) 1.65 1.65 2.35 2.35 8.0 (3.7-9.0) 3.23 (1.30-3.96) 16.31 14.95 90 Indoor units combination Unit A Unit B Unit C Unit D Total 09+09+09 2.67 2.67 2.67 - 09+09+12(13) 2.3 2.3 3.4 09+09+18 2.1 2.1 09+12(13)+12(13) 2.0 09+12(13)+18 6 NOTE: Electrical data is for outdoor unit only. Heating capacity (kw) Outdoor unit power consumption (kw) Current (A) 220V 240V Power factor (%) Indoor units combination Unit A Unit B Unit C Unit D Total 07 3.4 - - - 3.4 (2.1-3.6) 1.20 (0.91-1.28) 6.06 5.55 90 09 4.0 - - - 4.0 (2.1-4.2) 1.43 (0.91-1.51) 7.22 6.62 90 12(13) 6.0 - - - 6.0 (2.2-6.3) 1.79 (0.94-1.88) 9.04 8.29 90 18 7.1 - - - 7.1 (2.2-7.5) 2.10 (0.94-2.21) 10.61 9.72 90 07+07 3.4 3.4 - - 6.8 (4.1-7.2) 1.98 (1.13-2.18) 10.00 9.17 90 07+09 3.4 4.0 - - 7.4 (4.1-7.8) 2.23 (1.13-2.33) 11.26 10.32 90 07+12(13) 3.35 5.95 - - 9.3 (4.1-9.7) 2.82 (1.13-2.96) 14.24 13.05 90 07+18 2.85 6.45 - - 9.3 (4.1-9.7) 2.82 (1.13-2.96) 14.24 13.05 90 09+09 4.0 4.0 - - 8.0 (4.1-8.4) 2.38 (1.13-2.54) 12.02 11.01 90 09+12(13) 3.7 5.6 - - 9.3 (4.1-9.7) 2.82 (1.13-2.96) 14.24 13.05 90 09+18 3.35 5.95 - - 9.3 (4.1-9.7) 2.82 (1.13-2.96) 14.24 13.05 90 12(13)+12(13) 4.65 4.65 - - 9.3 (4.1-9.7) 2.82 (1.13-2.96) 14.24 13.05 90 12(13)+18 4.3 5.0 - - 9.3 (4.1-9.7) 2.82 (1.13-2.96) 14.24 13.05 90 18+18 4.65 4.65 - - 9.3 (4.1-9.7) 2.82 (1.13-2.96) 14.24 13.05 90 07+07+07 3.1 3.1 3.1 - 9.3 (5.2-10.6) 2.78 (1.19-2.96) 14.04 12.87 90 07+07+09 2.95 2.95 3.4 - 9.3 (5.2-10.6) 2.78 (1.19-2.96) 14.04 12.87 90 07+07+12(13) 2.5 2.5 4.3 - 9.3 (5.2-10.6) 2.78 (1.19-3.96) 14.04 12.87 90 07+07+18 2.3 2.3 4.7 - 9.3 (5.2-10.6) 2.78 (1.19-2.96) 14.04 12.87 90 07+09+09 2.8 3.25 3.25 - 9.3 (5.2-10.6) 2.78 (1.19-2.96) 14.04 12.87 90 07+09+12(13) 2.4 2.8 4.1 - 9.3 (5.2-10.6) 2.78 (1.19-2.96) 14.04 12.87 90 07+09+18 2.2 2.6 4.5 - 9.3 (5.2-10.6) 2.78 (1.19-3.96) 14.04 12.87 90 07+12(13)+12(13) 2.0 3.65 3.65 - 9.3 (5.2-10.6) 2.78 (1.19-2.96) 14.04 12.87 90 07+12(13)+18 1.9 3.4 4.0 - 9.3 (5.2-10.6) 2.78 (1.19-2.96) 14.04 12.87 90 07+18+18 1.9 3.75 3.75 - 9.3 (5.2-10.6) 2.78 (1.19-2.96) 14.04 12.87 90 7 NOTE: Electrical data is for outdoor unit only. Heating capacity (kw) Outdoor unit power consumption (kw) Current (A) 220V 240V Power factor (%) 9.3 (5.2-10.6) 2.78 (1.19-2.96) 14.04 12.87 90 - 9.3 (5.2-10.6) 2.78 (1.19-2.96) 14.04 12.87 90 4.4 - 9.3 (5.2-10.6) 2.78 (1.19-2.96) 14.04 12.87 90 3.5 3.5 - 9.3 (5.2-10.6) 2.78 (1.19-2.96) 14.04 12.87 90 2.2 3.3 3.8 - 9.3 (5.2-10.6) 2.78 (1.19-2.96) 14.04 12.87 90 09+18+18 2.0 3.65 3.65 - 9.3 (5.2-10.6) 2.78 (1.19-2.96) 14.04 12.87 90 12(13)+12(13) +12(13) 3.1 3.1 3.1 - 9.3 (5.2-10.6) 2.78 (1.19-2.96) 14.04 12.87 90 12(13)+12(13)+18 2.86 2.86 3.58 - 9.3 (5.2-10.6) 2.78 (1.19-2.96) 14.04 12.87 90 07+07+07+07 2.32 2.32 2.32 2.32 9.3 (5.2-10.6) 2.78 (1.19-2.96) 14.04 12.87 90 07+07+07+09 2.2 2.2 2.2 2.7 9.3 (5.2-10.6) 2.78 (1.19-2.96) 14.04 12.87 90 07+07+07+12(13) 2.0 2.0 2.0 3.3 9.3 (5.2-10.6) 2.78 (1.19-2.96) 14.04 12.87 90 07+07+07+18 1.9 1.9 1.9 3.6 9.3 (5.2-10.6) 2.78 (1.19-2.96) 14.04 12.87 90 07+07+09+09 2.15 2.15 2.5 2.5 9.3 (5.2-10.6) 2.78 (1.19-2.96) 14.04 12.87 90 07+07+09+12(13) 1.9 1.9 2.2 3.3 9.3 (5.2-10.6) 2.78 (1.19-2.96) 14.04 12.87 90 07+07+09+18 1.75 1.75 2.1 3.7 9.3 (5.2-10.6) 2.78 (1.19-2.96) 14.04 12.87 90 07+07+12(13) +12(13) 1.7 1.7 2.95 2.95 9.3 (5.2-10.6) 2.78 (1.19-2.96) 14.04 12.87 90 07+07+12(13)+18 1.6 1.6 2.8 3.3 9.3 (5.2-10.6) 2.78 (1.19-2.96) 14.04 12.87 90 07+09+09+09 2.1 2.4 2.4 2.4 9.3 (5.2-10.6) 2.78 (1.19-2.96) 14.04 12.87 90 07+09+09+12(13) 1.8 2.15 2.15 3.2 9.3 (5.2-10.6) 2.78 (1.19-2.96) 14.04 12.87 90 07+09+09+18 1.7 2.0 2.0 3.6 9.3 (5.2-10.6) 2.78 (1.19-2.96) 14.04 12.87 90 07+09+12(13) +12(13) 1.6 1.9 2.9 2.9 9.3 (5.2-10.6) 2.78 (1.19-2.96) 14.04 12.87 90 09+09+09+09 2.32 2.32 2.32 2.32 9.3 (5.2-10.6) 2.78 (1.19-2.96) 14.04 12.87 90 09+09+09+12(13) 2.05 2.05 2.05 3.15 9.3 (5.2-10.6) 2.78 (1.19-2.96) 14.04 12.87 90 09+09+09+18 1.95 1.95 1.95 3.45 9.3 (5.2-10.6) 2.78 (1.19-2.96) 14.04 12.87 90 09+09+12(13) +12(13) 1.85 1.85 2.8 2.8 9.3 (5.2-10.6) 2.78 (1.19-2.96) 14.04 12.87 90 Indoor units combination Unit A Unit B Unit C Unit D Total 09+09+09 3.1 3.1 3.1 - 09+09+12(13) 2.65 2.65 4.0 09+09+18 2.45 2.45 09+12(13)+12(13) 2.3 09+12(13)+18 8 Outdoor unit Electrical data ✻ 1 Capacity System 5 SPECIFICATION Model Indoor units number Piping total length Connecting pipe length Height difference (indoor ~ outdoor) Height difference (indoor ~ indoor) Capacity Cooling Sound level Capacity Booster heater Heating Sound level Power supply Mode Power consumption Running current Power factor Crankcase heater Starting current Compressor motor current Fan motor current External finish Height Width Dimensions Depth Weight Refrigerant filling capacity (R-22) Refrigerating oil <Model> In/Out connecting wire (Each room) Liquid pipe Refrigerant Gas pipe piping Connection method Compressor Protective Fan motor device Model Output Compressor Winding resistance (at 20 :) Model Output Fan motor Winding resistance (at 20 :) Air flow amount change Fan speed Air flow Power outlet RT61 (at 25:) RT62 (at 100:) RT63 (at 70:) Thermistor RT64 (at 25:) RT65 (at 25:) RT66, 67 (at 25:) TEST CONDITIONS COOLING INDOOR OUTDOOR HEATING INDOOR OUTDOOR m m m m kW dB kW W dB W A % W A A A mm mm mm kg kg cc mm mm W " W " rpm K/h A DB27.0°C WB19.0°C DB35.0°C WB24.0°C DB20.0°C DB 7.0°C WB 6.0°C MXZ-18NV- E1 MXZ-18NV- E2 2 Max. 30 Max. 20 Max. 7 Max. 7 4.5 (1.7 ~ 4.5) 45 5.8 (2.0 ~ 5.8) 46 Single phase, 220-240V, 50Hz Cooling Heating 2,000 (855~2000) 1,785 (690~1785) 10.21(5.28 - 10.21) - 9.26(4.83 - 9.26) 9.02(6.38 - 9.02) - 8.26(5.83 - 8.26) 89 - 90 90 - 90 10.21 9.74(4.87 - 9.74) - 8.86(4.43 - 8.86) 8.62(5.98 - 8.62) - 7.86(5.43 - 7.86) 0.4 Munsell 5Y 7/1 650 875 295 (+30) 56 1.3 570cc <MS-56> 2-core, 1pc. [2.0mm [9.52 (2pcs) [6.35 (2pcs) Flared ✻2 Inner thermostat RHV-207FEM (Rotary) 1,100 1.195(U-V, V-W, W-U) RA6V50 50 BLK-WHT 163, BLK-YLW 72, YLW-RED 36 2 630-670 2,460 - 2,580 25 10.0k" 13.4k" 7.9k" 10.0k" 10.0k" 10.0k" ✽2 Current detection Discharge temperature detection High-pressure switch ✽1 Electrical data is for only outdoor unit. 9 System Capacity Electrical data ✻ 1 Outdoor unit Model Indoor units number Piping total length Connecting pipe length Height difference (indoor ~ outdoor) Height difference (indoor ~ indoor) Capacity Cooling Sound level Capacity Booster heater Heating Sound level Power supply Mode Power consumption Running current Power factor Crankcase heater Starting current Compressor motor current Fan motor current External finish Height Width Dimensions Depth Weight Refrigerant filling capacity (R-22) Refrigerating oil <Model> In/Out connecting wire (Each room) Liquid pipe Refrigerant Gas pipe piping Connection method Compressor Protective Fan motor device Model Output Compressor Winding resistance (at 20 :) Model Output Fan motor Winding resistance (at 20 :) Air flow amount change Fan speed Air flow Power outlet RT61 (at 100:) RT62 (at 25:) RT63 (at 50:) Thermistor RT64 (at 25:) RT65 (at 25:) RT70,66, 67,68,69 (at 25:) TEST CONDITIONS COOLING INDOOR OUTDOOR HEATING INDOOR OUTDOOR ✽1 Electrical data is for only outdoor unit. 10 m m m m kW dB kW W dB W A % W A A A mm mm mm kg kg cc mm mm W " W " rpm K/h A MXZ-32NV- E1 MXZ-32NV- E2 3-4 Max. 60 Max. 25 Max. 10 Max. 10 8.0 (1.8 ~ 9.0) 45-47 9.3 (2.1 ~ 10.6) 46-48 Single phase, 220-240V, 50Hz Cooling Heating 3,230 (960~3,960) 2,780 (910~2,960) 16.31(4.85 - 20.00) - 14.95(4.44 - 18.33) 90 25 16.31 - 14.95 15.71(4.25 - 19.40) - 14.35(3.84 - 17.73) 13.44(4.00 - 14.35) - 12.27(3.62 - 13.10) 0.4 Munsell 5Y 8/1 900 900 320 (+35) 83.5 4.2 1070cc <MS-32> 2-core, 1pc. [2.0mm [12.7 (2pcs) [9.52 (2pcs) [6.35 (4pcs) Flared ✻2 Inner thermostat CHV253FAA (Scroal) 2,000 0.54(U-V, V-W, W-U) RA6V6060 BLK-WHT 79.0, BLK-YLW 27.0, YLW-BLU 12.0 BLU-RED 84.0 3 630 - 680 / 525 - 570 / 460 - 500 3000 / 2400 / 2100 25 13.4k" 10.0k" 17.0k" 10.0k" 10.0k" 10.0k" DB27.0°C WB19.0°C DB35.0°C WB24.0°C DB20.0°C DB 7.0°C WB 6.0°C ✽2 Current detection Discharge temperature detection High-pressure switch Crankcase heater Low-pressure switch Inner thermostat Rear piping hole Handle for monving 10 Max. 10 units 200 Side Rear air-intake air-intake 1000 23 100 7 295 Air in Handle for moving Outlet guide mounting hole 505 30 40 Drain hole 339 524 870 A B Drain hole 2-U-Shape noched hols (Base bolt M10) 2 Oval hols (12 13) (Base bolt M10) 302 Air out 27.5 39.5 12 Ground terminal 116 10 Leave overhead clearance fully 10 500 Base bolt length To drain water in a mass, use optional drain pan and drain socket. Drain pan : PAC-928DP,PAC-SA44DP Drain socket : PAC-SA46DS 25 10 Leave front clearance fully Space for servicing (flared 9.52) Gas pipe (flared 6.35) Liquid pipe Handle for moving 2 Leave overhead clearance fully 33 524 77 362 57 Necessary surrounding clearance for concentrated installation. 185 500 17 330 15 57 107 Air in R6 500 Max. 25 185 17 57 500 Necessary surrounding clearance 650 200 100 6 OUTLINES AND DIMENSIONS MXZ-18NV - E1 MXZ-18NV - E2 Unit:mm 11 1.Installation space 12 More than 100 More than 500 317 900 (Base bolt M10) 2-12 ✕ 36 Oval hole (Base bolt M10) 2-U-shape notched holes 27 Indoor and outdoor connect wiring 23✕45 hole 40 Air in 35 Air out 200 (16) Air in 320 Air in Air in 500 355 10 Service space More than 350 200 Note : Leave front, overhead and both clearance fully. 387 Handle for moving Note : Leave front and overhead clearance fully. Base (16) More than 500 More than 10 2.Service space More than 200 More than 350 More than 500 Note : Leave front and both sides clearance fully. More than 500 Veranda Base bollt length Less than 25 More than 10 More than 100 480.8 350.0 50 23 900 531.3 460 33 23 A unit connection B unit connection C unit connection D unit connection [ 6.35 (flared) 1/4 Liquid pipe 88 [ 9.52 (flared) 3/8 (C , D unit) [ 12.7 (flared) 1/2 (A , B unit) Rubber cushion MXZ-32NV - E1 MXZ-32NV - E2 Unit:mm 7 WIRING DIAGRAM MXZ-18NV- E2 V L WHT NAME SURGE ABSORBER C61 POWER-FACTOR CAPACITOR RED ORN BLU YLW GRN RED TR ❈V ❈W YLW ORN BLK WHT RED RED YLW GRN BLU 4 3 2 1 CN61 1 2 3 4 5 6 TAB91 CN63 CN731 C65 X67 FUSE2 ELECTRONIC CONTROL P.C.BOARD X60 LEV A RT63 RT64 RT65 RT66 RT67 RT61 RED RT67 EVAPORATION TEMPERATURETHERMISTOR CMC COIL R64 CURRENT-LIMITING RESISTOR COMPRESSOR R65 CURRENT-DETECTING RESISTOR C65 OUTDOOR FAN CAPACITOR MF OUTDOOR FAN MOTOR(INNER THERMOSTAT) FUSE(1A) BLU LEV A,B EXPANSION VALVE MC FUSE1 GRN SUCTION TEMPERATURETHERMISTOR L61 DS61,63 DIODE MODULE YLW RT66 CERAMIC CAPACITOR SMOOTHING CAPACITOR ORN NAME SYMBOL CERAMIC CAPACITOR CURRENT TRANSFORMER RED REACTOR L C63 CT61 BRN HPS C64 C67 8 7 6 5 4 3 2 1 LEV B NAME SYMBOL GRY 1 2 GRY CN671 4 3 2 1 GRY CN641 1 2 3 4 GRY CN681 1 2 3 4 GRY CN683 1 2 GRY CN661 GRY CN682 1 2 3 GRY CN771 1 2 3 4 5 6 GRY CN761 1 2 3 4 5 RT62 AR61 RED RED BLK ORN BLU 1 2 CN621 T801 1 2 FUSE1 SSR61 RELAY P.C.BOARD SYMBOL WHT BuP EuP BvP EvP BwPEwP GRY R64 1 2 CN801 BLK 1 2 3 4 5 6 BLU BLK 4 ❈ 1 2 3 BLK BuN EuN BvN EvN BwN EwN BLK 3 R65 21S4 RED LD64 ❈ RED BLU 1 2 3 4 BLU AR61 ❈ BRN YLW YLW YLW RED BLU BLK CT61 X64 NR61 1 2 3 4 ❈ BLU ❈ ❈ LD63 TB62 TB61 LD77 DS61 F62 LD62 LDE1 LD74 C64 BLU ❈❈ ❈ LD61 C63 RED LD72 WHT ❈ YLW ❈ - TBAC1 GRN + ORN ❈ TBAC2 + ~ ~ ~ RED BLU ❈ ❈ ❈ WHT ❈ - YLW ❈ RED ❈ P ❈U ❈N CN611 RED ~ RED RED CN601 ❈ WHT LD73 L61 BLU DC24V 3 ❈ ❈ BLK + RED BLK LD71 C61 RED ORN BLU CN941 RED ❈ - C67 ❈ WHT WHT ❈ ❈ DS63 ~ ❈ ❈ + BLK ❈ ❈ ❈ BLK 3 1 MF MC W WHT U ❈ NF61 4❈ ❈ BLK ❈ ❈ 2 BLK N N 3 1 RED TB ❈ NF62 4❈ BRN BLU DC24V 3 INDOOR TO UNIT (B) INDOOR UNIT CONNECTING INDOOR UNIT (A) BLU BRN BLU BRN POWER SUPPLY N ❈ 220-240V ~/N L ❈ 50Hz CIRCUIT BREAKER 2 BRN WHT GRN/YLW BLK TB CN701 E1 RED MODELS MXZ-18NV- NF61,62 NOISE FILTER NR61 VARISTOR RT61 DEFROST TEMPERATURETHERMISTOR RT62 DISCHARGE TEMPERATURETHERMISTOR SSR61 SOLID STATE RELAY TB TERMINAL BLOCK TR POWER TRANSISTOR MODULE T801 X60,67 TRANSFORMER FAN MOTOR RELAY FUSE2 FUSE(3.15A) RT63 FIN TEMPERATURETHERMISTOR X64 RELAY F62 FUSE(3.15A) RT64 GAS PIPE TEMPERATUREB.THERMISTOR 21S4 R.V.COIL HPS HIGH PRESSURE SWITCH RT65 GAS PIPE TEMPERATUREA.THERMISTOR NOTE:1. For the outdoor electric wining refer to the outdoor unit electric wining diagram for servicing. 2. Use copper conductors only.(For field wining) 3. Symbols below indicate. : Terminal block, : Connector 4. “ ✻ ”shows the terminals with a lock mechanism,so they cannnot be removed when you pull the lead wire. Be sure to pull the wire by pushing the locking lever (project part) of the terminal with a finger. 1.Slide the sleeve. 2.Pull the wire while pushing the locking lever. 13 MXZ-32NV- LDE LEV A SYMBOL C61 C62,63 C65 CH CT61,62 DS61 DS62 F801 F911 L L61 LEV A~D R RT61 RT62 RT63 RT64 21S4 21S2 CH LEV B LEV C CN794 1 2 3456 LEV D CN722 1 2 34 63H1 63L NAME POWER FACTOR CAPACITOR SMOOTHING CAPACITOR OUTDOOR FAN CAPACITOR CRANKCASE HEATER CURRENT TRANSFORMER DIODE MODULE DIODE STACK FUSE (1A) FUSE (1A) REACTOR COMMON MODE CHOKE COIL EXPANSION VALVE RESISTOR DISCHARGE TEMPERATURE THERMISTOR DEFROST TEMPERATURE THERMISTOR FIN TEMPERATURE THERMISTOR EVAPORATION TEMPERATURE THERMISTOR 7 65 43 2 1 CN515 YLW BLU CN663 CN662 1 2 1 2 3456 78 RT63 RT66 RT68 RT67 RT62 RT69 3 N C UNIT 3 N B UNIT 3 N A UNIT 3 N Indoor/outdoor connecting wire SYMBOL RT65 RT66,67 RT68,69 MC MF61 SSR61,62 SSR63 T801 TB2,3,4 X61,62,63 X64,65 X66,67 21S2 21S4 63H1 63H2 63L Make all connections as shown below. B UNIT Terminal block POWER SUPPLY ~/N 220-240V 50Hz 3 2 N L Power supply cord A UNIT 14 RT65 WHT WHT X65 X67 YLW 1.Slide the sleeve. 2.Pull the wire while pushing the locking lever. INDOOR UNIT C UNIT YLW NAME SUCTION TEMPERATURE THERMISTOR GUS PIPE TEMPERATURE THERMISTOR GUS PIPE TEMPERATURE THERMISTOR COMPRESSOR OUTDOOR FAN MOTOR (INNER FUSE) SOLENOID COIL RELAY CRANKCASE HEATER RELAY TRANSFORMER TERMINAL BLOCK FAN MOTOR RELAY RELAY RELAY SOLENOID COIL R.V. COIL HIGH PRESSURE SWITCH HIGH PRESSURE SWITCH LOW PRESSURE SWITCH D UNIT GROUND N L TAB66 RT64 RT61 INDOOR AND OUTDOOR ELECTRICAL WIRING CONNECTION FIGURE D UNIT TAB65 CN661 1 2 3456 78 NOTE:1. “- - - - “ denotes the wiring at the site. 2 “❈”show the terminals with a lock mechanism, so they cannot be removed when you pull the lead wire. Be sure to pull the wire by pushing the locking lever(projected part) of the terminal with a finger. OUTDOOR UNIT RELAY P.C. BOARD CT62 ELECTRONIC CONTROL P.C. BOARD CN793 1 2 3456 ORN GRY GRY BLK BLK GRY GRY GRY GRY CN792 1 2 3456 CN852 ORN W I.P.M P.C. BOARD MF61 GRY GRY GRY GRY GRY GRY GRY GRY CN851 X66 43 21 CN501 X61 X62 X63 RED ORN WHT BLK WHT 4 BLK BLK CN791 1 2 3456 RED BRN BLU ORN YLW WHT 3 6 1 2 3456 WHT BLU BEN GRN/YLW RED RED BLK BLK N 12VDC CN913 CN912 1 2 34 1 2 RED RED BLU BLU BLU YLW 12VDC 3 1 2 BLU ORN N CN902 1 23 CN723 N CN901 RED BRN BLU ORN YLW WHT 3 1 2 12VDC 1 2 3 1 2 12VDC CN720 BLU RED RED BRN BLU ORN YLW WHT TB3 CN604 CN603 CN602 CN601 N 1 2 34567 CN705 1 2 INDOOR UNIT (A) INDOOR UNIT (B) INDOOR UNIT (C) INDOOR UNIT (D) TAB64 T801 C65 RED BRN BLU ORN YLW WHT BRN CIRCUIT BRAKER F911 MC U X67 LD61 2 V BLK BLU L61 SSR63 N SSR61 LD62 GRY BLK CN704 L BLK NOISE FILTER P.C.BOARD LDB X64 0 1 TB2 CT 61 SSR62 X64 4 6 BLK LD64 GRN/YLW 1 2 34 CN801 POWER SUPPLY ~/N 220-240V 50Hz LDB LD63 TB4 BLK YLW CN551 YLW REDR BLK RED - YLW RED WHT - WHT TAB62 - C63 C62 + RED + L K (1A) A ORN F801 TAB63 - CN514 WHT 2 1 DS61 C61 + ORN + RED BLK CN554 DS62 CN553 GRY 2 1 BRN X65 E2 CN552 E1 X66 MODELS MXZ-32NV- 63H2 8 REFRIGERANT SYSTEM DIAGRAM 8.1 REFRIGERANT SYSTEM DIAGRAM MXZ-18NV - E1 MXZ-18NV - E2 Unit:mm Refrigerant flow in cooling Refrigerant flow in heating Service port (Low pressure) Compressor Discharge temperature thermistor RT62 High pressure switch Muffler Service port (high pressure) Reversing valve Gas pipe thermistor 9.52 Indoor unit A Indoor unit B Ball valve Charge port 9.52 Gas pipe thermistor Suction temperature thermistor RT66 Capillary tube 4.0X 6.35 Expansion Strainer valve(LEV) 2.4X 300 Ball valve with service port Indoor unit A Indoor unit B Evaporation temperature thermistor RT67 2.0X 0.6X500 Strainer Capillary 6.35 Expansion tube Strainer valve(LEV) 4.0X 2.4X 300 Outdoor heat exchanger Capillary tube Defrost thermistor RT61 9.52 Capillary tube 4.0X 2.4X 400 R.V. coil heating ON cooling OFF Low pressure switch MXZ-32NV - E1 MXZ-32NV - E2 Refrigerant flow in cooling Refrigerant flow in heating Suction temperature thermistor [16 Compressor High pressure switch 1 High pressure switch 2 Discharge temperature thermistor Capillary tube Oil separator [2.5✕ [0.6✕1000 Unit D gas pipe temperature thermistor [9.52 Indoor unit D Unit C gas pipe temperature thermistor Indoor unit C Indoor unit B R.V. coil heating ON cooling OFF Accumlator Capillary tube [3.0✕[2.0✕ 500 Capillary tube Ball valve with service port [3.0✕[2.0✕500 [9.52 2-way-valve Reversing valve Unit B gas pipe temperature thermistor [12 [16 Unit A gas pipe temperature thermistor [16 [12 Indoor unit A Evaportation temperature thermistor (RT67) Indoor unit A Strainer LEV Strainer Strainer LEV Strainer Strainer LEV Strainer Strainer LEV Strainer Indoor unit B Indoor unit C Indoor unit D [6 Ball valve with service port Capillary tube [2.5✕[0.6✕ 750 Capillary tube [4.0✕[2.4✕ 400 Defrost thermistor [6 [6 Outdoor heat exchanger Strainer Distributor Distributor [9.52 [6 15 8.2 MAX REFRIGERANT PIPING LENGTH MXZ-18NV - E1 MXZ-18NV - E2 Piping length for each indoor unit (a,b) a Outodoor unit 20m Total piping length (a+b) 30m Height difference between units (H) 7m Bending point for each unit 15 Total bending point 30 H H H b ❈ It does not matter which unit is higher MXZ-32NV - E1 MXZ-32NV - E2 Indoor units a b Outdoor unit Piping length each indoor unit (a, b, c, d) 25m Total piping length (a+b+c+d) 60m Height difference between units (H) 10m Bending point for each unit 15 Total bending point 30 ❋It does not matter which unit is higher. 16 H H c H d 8.3 PIPE SIZE SELECTION MXZ-18NV - E1 MXZ-18NV - E2 ● Refrigerant pipe diameter is different according to indoor unit to be connected. When using extension pipes, refer to the table below. ● When diameter of refrigerant pipe is different from that of outdoor unit union, use optional L-joint. For further information on L-joint, see page 62. Unit : mm (inch) Indoor unit class 07/09 12 Extention pipe diameter Pipe diameter Liquid 6.35(1/4) Liquid 6.35(1/4) Gas 9.52(3/8) Gas 9.52(3/8) Liquid 6.35(1/4) Liquid 6.35(1/4) Gas 12.7(1/2) Gas 12.7(1/2) Outdoor unit union diameter For Indoor unit A Indoor unit B Liquid 6.35(1/4) Gas 9.52(3/8) Liquid 6.35(1/4) Gas 9.52(3/8) MXZ-32NV - E1 MXZ-32NV - E2 ●Refrigerant pipe diameter is different according to indoor unit to be connected. When using extention pipes,refer to the tables below. ●When diameter of refrigerant pipe is different from that of outdoor unit union, use optional Different-diameter pipe. For further information on Different-diameter pipe,see page 62. Unit : mm (inch) Indoor unit class 07/09 12(13) 18 Pipe diameter Extention pipe diameter Liquid 6.35(1/4) Liquid 6.35(1/4) Gas 9.52(3/8) Gas 9.52(3/8) Liquid 6.35(1/4) Liquid 6.35(1/4) Gas 12.7(1/2) Gas 12.7(1/2) Liquid 6.35(1/4) Liquid 6.35(1/4) Gas 15.88(5/8) Gas 15.88(5/8) Outdoor unit union diameter For Indoor unit A Indoor unit B Indoor unit C Indoor unit D Liquid 6.35(1/4) Gas 12.7(1/2) Liquid 6.35(1/4) Gas 12.7(1/2) Liquid 6.35(1/4) Gas 9.52(3/8) Liquid 6.35(1/4) Gas 9.52(3/8) 17 8.4 EVACUATION PROCEDURES MXZ-18NV - E1 MXZ-18NV - E2 CAUTION : If you run this unit with air in its refrigerant pipe before air purge, the compressor will decline in cooling capacity, which may result in trouble. ❶. Connect the refrigerant pipes (both the liquid and gas pipes) between the indoor and the uotdoor units. ❷. Remove the service port cap of the stop valve on the side of the outdoor unit gas pipe.[ The stop valve will not work in its initial atate fresh out of the factory (totally closed with cap on).] ❸. Connect the gauge manifold valve and the vacuum pump to the service port of the stop valve on the side of the outdoor unit gas pipe. Service port Gauge manifold valve Connect pipes Vacuum pump ❹. Run the vacuum pump. ❺. Check the vacuum with the gauge manifold valve, then close the gauge manifold valve, and stop the vacuum pump. ❻. Leave it as is for one or two minutes.Make sure the pointer of the gauge manifold valve remains in the same position. ❼. Remove the cape from the stop valves of the outdoor unit, liquid pipe, and gas pipe. Pull the handle towards you with a finger. Turn it one fourth turn counterclockwise, to obtain the full-open position. ❽. Remove the cape manifold valve quickly from the service port of the stop valve. ❾. Tishten the cap to the service port to obtain the initial status. ❿. Thrust the handle of the stop valve into the unit, then retighten the cap. Leak test ....... With a gas detector or soap water, check the flared nut connections for any refrigerant leak. In case of a refrigerant leak ● Retighten the flared nut connections. ● If the leak does not stop even after retightening, repair the leaking point, collect all from inside the unit through the service port, apply a vacuum to it, then charge a specified amount of gas with a gas cylinder. 18 MXZ-32NV - E1 MXZ-32NV - E2 ● For details about how to use manifold valves, see the instruction manual for manifold valves. ● The valve knob Hi below cannot operate during the following work if it is fully closed. Warning : When installing or moving the unit, do not mix anything other than specified refrigerant (R-22) into the refrigerating cycle. If air is mixed, it may cause the refrigerating cycle to get abnormally high temperature, causing a risk of burst. ❶. Make sure the pipes are connected securely. ❷. Connect the projected side (on which the setting pin is pressed) of the gauge manifold valve´s charge hose to the stop valve´s service port (gas pipe side). ❸. Make sure the stop valves of gas and liquid pipes are fully closed, and connect the charge house to the vacuum pump. Compound gauge Pressure gauge -1.01✕10 Pa (-760mmHg) Stop valve (gas side) Valve knob Lo Gauge Manifold Valve knob Hi Service port Vacuum pump Charge hose ❹. Fully open the manifold valve´s valve knob Lo and operate the vacuum pump. Loosen the stop valve flare nut on the gas pipe side a little bit and make sure that air is entering. Then tighten the flare nut not to enter the air. After that, make sure that the charge hose is connected firmly to the service port. ❺. Purge air for more than 15 minutes, and make sure the compound gauge is reading - 1.01 ✕ 105 Pa (-760mmHg). ❻. After purging air, fully close the manifold valve´s valve knob Lo and stop operating the vacuum pump. ❼. Leave the situation for about 1 to 2 minutes, make sure the needle of the compound gauge does not return, pull the stop valve´s knob toward you, and fully open the stop valve by turning it a quarter turn counterclockwise. ❽. Quickly remove the gauge manifold valve´s charge hose from the stop valve´s service port. ❾. Tighten the service port cap 1/12 turn more from where the tightening torque is suddenly increased. (It is equivalent to a tightening torque of 13.7 to 17.7N-m (140 to 180kgf-cm).) ❿. Tighten the service port cap 1/12 turn more from where the tightening torque is suddenly increased. (It is equivalent to a tightening torque of 19.6 to 29.4N-m (200 to 300kgf-cm).) Leak test ....... With a gas detector or soap water, check the flared nut connections for any refrigerant leak. In case of a refrigerant leak ● Retighten the flared nut connections. ● If the leak does not stop even after retightening, repair the leaking point, collect all from inside the unit through the service port, apply a vacuum to it, then charge a specified amount of gas with a gas cylinder. 19 9 PERFORMANCE CURVES The standard data contained in these specifications apply only to the operation of the air conditioner, that is one indoor unit with one outdoor unit, under normal conditions. Since operating conditions vary according to the areas where these units are installed. The following information has been provided to clarify the operating characteristics of the air conditioner under the conditions indicated by the performance curve. (1) GUARANTEED VOLTAGE Rated voltage : ±10% (198 ~ 264V 50Hz ) (2) AIR FLOW Air flow should be set at MAX. (3) MAIN READINGS (1) Indoor intake air wet-bulb temperature : (2) Indoor discharge air wet-bulb temperature : (3) Outdoor intake air dry-bulb temperature : (4) Total input: (5) Indoor intake air dry-bulb temperature : (6) Outdoor intake air wet-bulb temperature : (7) Total input : °CWB °CWB °CDB W °CDB °CWB W } Cooling } Heating Indoor air wet-bulb temperature difference on the left side of the chart on next page shows the difference between the indoor intake air wet-bulb temperature and the indoor discharge air wet-bulb temperature for your reference at service. How to measure the indoor air wet-bulb temperature difference 1. Attach at least 2 sets of wet-and dry-bulb thermometers to the indoor air intake as shown in the figure, and at least 2 sets of wet-and dry-bulb thermometers to the indoor air outlet. The thermometers must be attached to the position where air speed is high. 2. Attach at least 2 sets of wet-and dry-bulb thermometers to the outdoor air intake. Cover the thermometers to prevent direct rays of the sun. 3. Check if the air filter is cleaned. 4. Open windows and doors of room. 5. Press the EMERGENCY ON/OFF button to start the EMERGENCY operation. 6. When system stabilizes after more than 15 minutes, measure temperature and take an average temperature. 7. Ten minutes later, measure temperature again and check that the temperature does not change. INDOOR UNIT 20 OUTDOOR UNIT 9.1.Capacity and input correction by inverter output frequency (OUTDOOR UNIIT:MXZ-18NV) NOTE 1 : Inverter output frequency : COOL 58Hz,HEAT 58Hz NOTE 2 : The dotted line on graphs connects the frequency range in normal operation shown by the full line and the frequency in test run shown by the point. 9.1.1.07-class unit in single operation <COOL>Capacity <COOL>Total input <HEAT>Capacity <HEAT>Total input 1.5 1.5 1.5 1.5 1.0 1.0 1.0 1.0 0.5 0.5 0.5 0.5 30 40 50 60Hz Frequency 30 40 50 60Hz Frequency 30 40 50 60 70Hz Frequency 30 40 50 60 70Hz Frequency 9.1.2.09-class unit in single operation <COOL>Capacity <COOL>Total input <HEAT>Capacity <HEAT>Total input 1.5 1.5 1.5 1.5 1.0 1.0 1.0 1.0 0.5 0.5 0.5 0.5 30 40 50 60Hz Frequency 30 40 50 60Hz Frequency 30 40 50 60 70Hz Frequency 30 40 50 60 70Hz Frequency 9.1.3.12-class unit in single operation <COOL>Capacity <COOL>Total input <HEAT>Capacity <HEAT>Total input 1.5 1.5 1.5 1.5 1.0 1.0 1.0 1.0 0.5 0.5 0.5 0.5 30 40 50 60 70 Frequency 80Hz 30 40 50 60 70 Frequency 80Hz 30 40 50 60 70 Frequency 80Hz 30 40 50 60 70 Frequency 80Hz 21 9.2.Capacity and input correction by inverter output frequency (OUTDOOR UNIIT:MXZ-18NV) NOTE 1 : Inverter output frequency : COOL 58Hz,HEAT 40Hz NOTE 2 : The dotted line on graphs connects the frequency range in normal operation shown by the full line and the frequency in test run shown by the point. 9.2.1.07-class unit in single operation <COOL>Capacity <COOL>Total input <HEAT>Capacity <HEAT>Total input 1.5 1.5 1.5 1.5 1.0 1.0 1.0 1.0 0.5 0.5 0.5 0.5 30 40 50 60Hz Frequency 30 40 50 60Hz Frequency 30 40 50 60Hz Frequency 30 40 50 60Hz Frequency 9.2.2.09-class unit in single operation <COOL>Capacity <COOL>Total input <HEAT>Capacity <HEAT>Total input 1.5 1.5 1.5 1.5 1.0 1.0 1.0 1.0 0.5 0.5 0.5 0.5 30 40 50 60Hz Frequency 30 40 50 60Hz Frequency 30 40 50 60Hz Frequency 30 40 50 60Hz Frequency 9.2.3.12-class unit in single operation <COOL>Capacity <COOL>Total input <HEAT>Capacity <HEAT>Total input 1.5 1.5 1.5 1.5 1.0 1.0 1.0 1.0 0.5 0.5 0.5 0.5 30 40 50 60 70 Frequency 80Hz 30 40 50 60 70 Frequency 80Hz 30 40 50 60 70 Frequency 80Hz 30 40 50 60 70 Frequency 80Hz 9.2.4.18-class unit in single operation <COOL>Capacity <COOL>Total input <HEAT>Capacity <HEAT>Total input 1.5 1.5 1.5 1.5 1.0 1.0 1.0 1.0 0.5 0.5 0.5 0.5 30 22 40 50 60 70 Frequency 80Hz 30 40 50 60 70 Frequency 80Hz 30 40 50 60 70 Frequency 80Hz 30 40 50 60 70 Frequency 80Hz 9.3.Outdoor low pressure and outdoor unit current 9.3.1.07-class unit in single operation(OUTDOOR UNIT : MXZ-18NV) NOTO:The unit of pressure has been changed to MPa on the international system of units(SI unit system). The converted score against the traditional unit system can be gotten according to the formula below. f • G) 1(MPa • G) =10.2(kgf/f (1) COOL operation 1Both indoor and outdoor units are under the same temperature/humidity condition. Dry-bulb temperature(°C) Relative humidity(%) 20 50 25 60 30 70 <How to work fixed-frequency operation> 1.Set emergency switch to COOL or HEAT.The switch is located on indoor unit. 2.Press emergency run ON/OFF button. 3.Compressor starts running at 58Hz (COOL / HEAT). 4.Indoor fan runs at HI speed and continues for 30 minutes. 5.To cancel this operation,press emergency run ON/OFF button or any button on remote controller. 2Air flow speed : HI 3Inverter output frequency : 58Hz (kgf/F• G)(MPa•G) 0.6 6 8 58Hz 220V 5 4 Outdoor unit current (A) Outdoor low pressure 58Hz 0.5 0.4 3 0.3 2 0.2 7 58Hz 240V 6 5 4 3 18 20 25 30 32(oC) 50 60 70 (%) Ambient temperature(oC) / Ambient humidity(%) 18 20 25 30 32(oC) 50 60 70 (%) Ambient temperature(oC) / Ambient humidity(%) (2) HEAT operation ① Indoor DB(°C) 20.0 Outdoor DB(°C) 2 7 15 20.0 WB(°C) 14.5 WB(°C) 1 6 12 14.5 ➁ Set air flow to Hi speed. ➂ Inverter output frequency is 58Hz. 5 4 3 2 10 Outdoor unit current (A) Outdoor low pressure (kgf/F• G)(MPa•G) 0.6 6 0.5 58Hz 0.4 0.3 0.2 2 5 10 15 Ambient temperature(oC) 20 9 8 58Hz 220V 58Hz 240V 7 6 2 5 10 15 Ambient temperature(oC) 20 23 9.3.2.09-class unit in single operation (OUTDOOR UNIT : MXZ-18NV) NOTO:The unit of pressure has been changed to MPa on the international system of units(SI unit system). The converted score against the traditional unit system can be gotten according to the formula below. f • G) 1(MPa • G) =10.2(kgf/f (1) COOL operation 1Both indoor and outdoor units are under the same temperature/humidity condition. Dry-bulb temperature(°C) Relative humidity(%) 20 50 25 60 30 70 <How to work fixed-frequency operation> 1.Set emergency switch to COOL or HEAT.The switch is located on indoor unit. 2.Press emergency run ON/OFF button. 3.Compressor starts running at 58Hz (COOL / HEAT). 4.Indoor fan runs at HI speed and continues for 30 minutes. 5.To cancel this operation,press emergency run ON/OFF button or any button on remote controller. 2Air flow speed : HI 3Inverter output frequency : 58Hz (kgf/F• G)(MPa•G) 0.6 6 8 58Hz 220V 5 4 Outdoor unit current (A) Outdoor low pressure 58Hz 0.5 0.4 3 0.3 2 0.2 7 58Hz 240V 6 5 4 3 18 20 25 30 32(oC) 50 60 70 (%) Ambient temperature(oC) / Ambient humidity(%) 18 20 25 30 32(oC) 50 60 70 (%) Ambient temperature(oC) / Ambient humidity(%) (2) HEAT operation ① Indoor DB(°C) 20.0 Outdoor DB(°C) 2 7 15 20.0 WB(°C) 14.5 WB(°C) 1 6 12 14.5 ➁ Set air flow to Hi speed. ➂ Inverter output frequency is 58Hz. 5 4 3 2 24 10 Outdoor unit current (A) Outdoor low pressure (kgf/F• G)(MPa•G) 0.6 6 0.5 58Hz 0.4 0.3 0.2 2 5 10 15 Ambient temperature(oC) 20 9 8 58Hz 220V 58Hz 240V 7 6 2 5 10 15 Ambient temperature(oC) 20 9.3 .3. 12-class unit in single operation (OUTDOOR UNIT : MXZ-18NV) NOTO:The unit of pressure has been changed to MPa on the international system of units(SI unit system). The converted score against the traditional unit system can be gotten according to the formula below. f • G) 1(MPa • G) =10.2(kgf/f (1) COOL operation 1Both indoor and outdoor units are under the same temperature/humidity condition. Dry-bulb temperature(°C) Relative humidity(%) 20 50 25 60 30 70 <How to work fixed-frequency operation> 1.Set emergency switch to COOL or HEAT.The switch is located on indoor unit. 2.Press emergency run ON/OFF button. 3.Compressor starts running at 58Hz (COOL/HEAT). 4.Indoor fan runs at HI speed and continues for 30 minutes. 5.To cancel this operation,press emergency run ON/OFF button or any button on remote controller. 2Air flow speed : HI 3Inverter output frequency : 58Hz (kgf/F• G)(MPa•G) 0.6 6 8 5 4 Outdoor unit current (A) Outdoor low pressure 58Hz 0.5 0.4 3 0.3 2 0.2 (2) HEAT operation ① Indoor DB(°C) Outdoor DB(°C) WB(°C) 14.5 ➁ Set air flow to Hi speed. ➂ Inverter output frequency is 58Hz. WB(°C) 4 3 2 20.0 1 6 12 14.5 0.3 2 18 20 25 30 32(oC) 50 60 70 (%) Ambient temperature(oC) / Ambient humidity(%) 10 0.4 0.2 4 15 58Hz 0.5 5 7 Outdoor unit current (A) Outdoor low pressure 5 6 2 (kgf/F• G)(MPa•G) 0.6 6 58Hz 240V 3 18 20 25 30 32(oC) 50 60 70 (%) Ambient temperature(oC) / Ambient humidity(%) 20.0 7 5 10 15 Ambient temperature(oC) 20 9 58Hz 220V 8 58Hz 240V 7 6 2 5 10 15 Ambient temperature(oC) 20 25 9.4.Outdoor low pressure and outdoor unit current 9.4.1.07-class unit in single operation (OUTDOOR UNIT : MXZ-32NV) NOTO:The unit of pressure has been changed to MPa on the international system of units(SI unit system). The converted score against the traditional unit system can be gotten according to the formula below. f • G) 1(MPa • G) =10.2(kgf/f (1) COOL operation 1Both indoor and outdoor units are under the same temperature/humidity condition. Dry-bulb temperature(°C) Relative humidity(%) 20 50 25 60 30 70 <How to work fixed-frequency operation> 1.Set emergency switch to COOL or HEAT.The switch is located on indoor unit. 2.Press emergency run ON/OFF button. 3.Compressor starts running at 58Hz (COOL) or 40Hz (HEAT). 4.Indoor fan runs at HI speed and continues for 30 minutes. 5.To cancel this operation,press emergency run ON/OFF button or any button on remote controller. 2Air flow speed : HI 3Inverter output frequency : 58Hz 5 4 11 10 0.5 Outdoor unit current (A) Outdoor low pressure (kgf/F• G)(MPa•G) 0.6 6 58Hz 0.4 3 0.3 2 0.2 58Hz 9 8 7 6 18 20 25 30 32(oC) 50 60 70 (%) Ambient temperature(oC) / Ambient humidity(%) 18 20 25 30 32(oC) 50 60 70 (%) Ambient temperature(oC) / Ambient humidity(%) (2) HEAT operation ① Indoor DB(°C) 20.0 Outdoor DB(°C) 2 7 15 20.0 WB(°C) 14.5 WB(°C) 1 6 12 14.5 ➁ Set air flow to Hi speed. ➂ Inverter output frequency is 40Hz. Outdoor unit current (A) 10 9 8 7 6 26 40Hz 2 5 10 15 Ambient temperature(oC) 20 9.4.2.09-class unit in single operation (OUTDOOR UNIT : MXZ-32NV) NOTO:The unit of pressure has been changed to MPa on the international system of units(SI unit system). The converted score against the traditional unit system can be gotten according to the formula below. f • G) 1(MPa • G) =10.2(kgf/f (1) COOL operation 1Both indoor and outdoor units are under the same temperature/humidity condition. Dry-bulb temperature(°C) Relative humidity(%) 20 50 25 60 30 70 <How to work fixed-frequency operation> 1.Set emergency switch to COOL or HEAT.The switch is located on indoor unit. 2.Press emergency run ON/OFF button. 3.Compressor starts running at 58Hz (COOL) or 40Hz (HEAT). 4.Indoor fan runs at HI speed and continues for 30 minutes. 5.To cancel this operation,press emergency run ON/OFF button or any button on remote controller. 2Air flow speed : HI 3Inverter output frequency : 58Hz 6 5 11 10 58Hz 0.6 Outdoor unit current (A) Outdoor low pressure (kgf/F• G)(MPa•G) 0.7 7 0.5 4 0.4 3 0.3 58Hz 9 8 7 6 25 30 32(oC) 60 70 (%) Ambient temperature(oC) / Ambient humidity(%) 18 20 50 (2) HEAT operation ① Indoor DB(°C) 20.0 Outdoor DB(°C) 2 7 15 20.0 WB(°C) 14.5 WB(°C) 1 6 12 14.5 18 20 25 30 32(oC) 50 60 70 (%) Ambient temperature(oC) / Ambient humidity(%) ➁ Set air flow to Hi speed. ➂ Inverter output frequency is 40Hz. Outdoor unit current (A) 9 8 40Hz 7 6 5 2 5 10 15 Ambient temperature(oC) 20 27 9.4.3. 12(13)-class unit in single operation (OUTDOOR UNIT : MXZ-32NV) NOTO:The unit of pressure has been changed to MPa on the international system of units(SI unit system). The converted score against the traditional unit system can be gotten according to the formula below. f • G) 1(MPa • G) =10.2(kgf/f (1) COOL operation 1Both indoor and outdoor units are under the same temperature/humidity condition. Dry-bulb temperature(°C) Relative humidity(%) 20 50 25 60 30 70 <How to work fixed-frequency operation> 1.Set emergency switch to COOL or HEAT.The switch is located on indoor unit. 2.Press emergency run ON/OFF button. 3.Compressor starts running at 58Hz (COOL) or 40Hz (HEAT). 4.Indoor fan runs at HI speed and continues for 30 minutes. 5.To cancel this operation,press emergency run ON/OFF button or any button on remote controller. 2Air flow speed : HI 3Inverter output frequency : 58Hz 7 6 5 4 3 11 10 0.7 Outdoor unit current (A) Outdoor low pressure (kgf/F• G)(MPa•G) 0.8 8 58Hz 0.6 0.5 0.4 0.3 (2) HEAT operation ① Indoor DB(°C) Outdoor DB(°C) WB(°C) 14.5 ➁ Set air flow to Hi speed. ➂ Inverter output frequency is 40Hz. WB(°C) 9 8 7 6 18 20 25 30 32(oC) 50 60 70 (%) Ambient temperature(oC) / Ambient humidily(%) 20.0 58Hz 18 20 25 30 32(oC) 50 60 70 (%) Ambient temperature(oC) / Ambient humidily(%) 2 7 15 20.0 1 6 12 14.5 Outdoor unit current (A) 9 8 40Hz 7 6 5 28 2 5 10 15 Ambient temperature(oC) 20 9.4.4. 18-class unit in single operation NOTO:The unit of pressure has been changed to MPa on the international system of units(SI unit system). The converted score against the traditional unit system can be gotten according to the formula below. f • G) 1(MPa • G) =10.2(kgf/f (1) COOL operation ① Both indoor and outdoor units are under the same temperature/humidity condition. Dry-bulb temperature(°C) Relative humidity(%) 20 50 25 60 30 ➁ Air flow speed : HI ➂ Inverter output frequency : 58Hz 70 <How to work fixed-frequency operation> 1.Set emergency switch to COOL or HEAT.The switch is located on indoor unit. 2.Press emergency run ON/OFF button. 3.Compressor starts running at 58Hz (COOL) or 40Hz (HEAT). 4.Indoor fan runs at HI speed. 5.To cancel this operation,press emergency run ON/OFF button or any button on remote controller. 6 5 4 3 10 0.7 Outdoor unit current (A) 7 11 58Hz 0.6 0.5 0.4 0.3 (2) HEAT operation ① Indoor DB(°C) 20.0 Outdoor DB(°C) WB(°C) 14.5 ➁ Set air flow to Hi speed. ➂ Inverter output frequency is 58Hz. WB(°C) 58Hz 9 8 7 6 18 20 25 30 32(oC) 50 60 70 (%) o Ambient temperature( C) / Ambient humidily(%) 18 20 25 30 32(oC) 50 60 70 (%) o Ambient temperature( C) / Ambient humidily(%) 2 7 15 20.0 1 6 12 14.5 9 Outdoor unit current (A) Outdoor low pressure (kgf/F• G)(MPa•G) 0.8 8 8 40Hz 7 6 5 2 5 10 15 Ambient temperature(oC) 20 29 10 MICROPROCESSOR CONTROL 10.1.System organization MXZ-18NV - E1 MXZ-18NV - E2 <Electronic controls> Compressor secondary current Indoor unit A Compressor primary current Indoor unit B Outdoor unit microprocessor Drive circuit 4- Way valve relay Transistor module Fit temperature thermistor RT63 Outdoor fan relay Rushing current restricting relay Compressor Room A Gas pipe temperature thermistor <Refrigerant circuit> High pressure switch Discharge temperature thermistor RT62 Accumulator Indoor unit A Indoor unit B Room B Gas pipe temperature thermistor Suction temperature thermistor RT66 Evaporation temperature thermistor Capillary RT67 tube Indoor unit B Indoor unit A 30 Expansion valve B Expansion valve A Outdoor fan motor Defrost thermistor RT61 Outdoor fan speed control relay MXZ-32NV - E1 MXZ-32NV - E2 Power factor Indoor unit microprocessor Compressor primary current Compressor secondary current Outdoor unit control microprocessor SSR Drive circuit SSR SSR Transistor module Crankcase heater L.P.S Accumlator Comp. Inner thermostat H.P.S x 61 x 62 x 63 Suction temperature thermistor Discharge temperature thermistor Indoor Unit D 2-way -valve Indoor Unit C Indoor Unit B 4-way Gas pipe -valve temperature thermistor Indoor Unit A Evaporation temperature thermistor Outdoor fan motor Indoor Unit A Indoor Unit B Indoor Unit C Indoor Unit D Defrost thermistor LEV1 LEV2 LEV3 LEV4 31 No. Item 1 LEV control Details Linear expansion valve (LEV) is controlled by "Thermostat ON" commands given from each unit. LEV opening Indoor unit status MXZ-18NV Before shutdown ➝ 350 pulse All indoor units OFF COOL : 5 pulse HEAT : 49 pulse Non-opening indoor unit Thermostat OFF in COOL or DRY mode MXZ-32NV ❈ 52 ➝ 500 pulse COOL : 5 pulse HEAT : 59 pulse Outdoor unit ON (Indoor unit ON) : 5 pulse Outdoor unit OFF (Indoor unit OFF or Thermostat OFF) : Before shutdown Thermostat ON in COOL mode Refer to the standard LEV opening as shown below. From the initial valve, the LEV opening is controlled according to suction superheat and the discharge temperature. Refer to the standard LEV opening as shown below. Thermostat ON in DRY mode Thermostat OFF in HEAT mode Outdoor unit ON (Indoor unit ON) : 5 pulse Outdoor unit OFF (Indoor unit OFF or Thermostat OFF) : ❈ 52 ➝ 500 pulse Outdoor unit ON (Indoor unit ON) : 49 pulse Outdoor unit OFF (Indoor unit OFF or Thermostat OFF) : Before shutdown Outdoor unit ON (Indoor unit ON) : 5 pulse Outdoor unit OFF (Indoor unit OFF or Thermostat OFF) : ❈ 52 ➝ 500 pulse Refer to the standard LEV opening as shown below. From the initial valve, the LEV opening is controlled according to the suction superheat and the discharge temperature. Thermostat ON in HEAT mode ❈ For the differential start-up, the LEV is controlled at 52 pulse for the first 15 minutes after compressor stop. Standard LEV opening There are 10 levels specified for standard LEV opening depending on the compressor operational frequency. Based on these standard valves, the LEV opening is modified according to the suction superheat, discharge temperature, and gas pipe temperature. <LEV opening> Level 10 Level 09 Level 08 Level 07 Level 06 Level 05 Level 04 Level 03 Level 02 Level 01 Hysteresis width =5Hz 30 40 50 60 70 80 90 100 110 120 < COMP Hz > <Standard LEV opening by capacity code> Capacity class Level 01 Level 02 Level 03 Level 04 Level 05 Level 06 Level 07 Level 08 Level 09 Level 10 32 MXZ-18NV-E1 09 100/70 100/70 100/70 100/70 100/70 110/80 120/90 130/100 140/110 150/120 MXZ-18NV-E2 12 07,09 255/90 255/70 255/90 255/70 255/90 255/70 255/90 255/70 255/90 255/70 255/100 255/80 255/110 255/90 255/120 255/100 255/130 255/110 255/140 255/120 MXZ-32NV-E1,E2 07,09 12,13 18 100/70 130/90 145/100 100/70 130/90 145/100 100/90 130/110 145/120 100/110 130/130 145/140 100/130 130/150 145/160 110/150 140/170 155/180 120/170 150/190 165/200 130/190 160/210 175/220 140/210 170/230 185/240 150/230 180/250 195/260 No. Item Details ① LEV opening correction by suction superheat (Suction superheat) = (Suction temperature) - (Evaporation temperature) The LEV opening is corrected as shown in the following table. LEV opening correction (pulse) Suction superheat (S.H.) MXZ-18NV- E2 MXZ-18NV- E1 MXZ-32NV- E1 E2 Cooling Heating Cooling Heating Cooling Heating 20 15 40 15 20 10 8 < S.H [ 10 15 10 30 10 15 10 7 < S.H [ 8 15 10 30 10 15 10 5 < S.H [ 7 8 5 16 5 7 5 4 < S.H [ 5 4 3 8 3 0 0 2 < S.H [ 4 0 0 0 0 0 0 0 < S.H [ 2 0 0 0 0 0 0 S.H [ 0 0 0 0 0 0 0 10 < S.H ➁ LEV opening correction by discharge temperature The LEV opening is corrected to 55 pulse when it has been corrected consecutively 20 times due to the discharge temperature (Td) of 60; or below, or when the discharge temperature falls below 35°C. When such a status has continued for 10 minutes, the compressor stops and enters the 3 - minute time delay. If the compressor stops five times during a continuous operation, the unit stops due to abnormality. LEV opening correction (pulse) MXZ-32NV- E1 E2 MXZ-18NV- E1 E2 Two units or more For capacity class 07 or 09 in single unit operation Discharge Discharge Discharge Discharge Cooling Heating Cooling Cooling Heating Heating temperature (:) temperature (:) temperature (:) temperature (:) 100 < Td 100 < Td 5 20 10 10 95 < Td [ 100 5 20 95 < Td [ 100 5 10 95 < Td [ 100 10 95 < Td [ 100 10 90 < Td [ 95 5 20 90 < Td [ 95 0 5 92 < Td [ 95 10 90 < Td [ 95 10 85 < Td [ 90 1 20 85 < Td [ 90 -2 5 85 < Td [ 92 5 85 < Td [ 90 5 80 < Td [ 85 0 20 80 < Td [ 85 -2 0 80 < Td [ 85 0 80 < Td [ 85 5 75 < Td [ 80 -2 2 75 < Td [ 80 -5 0 75 < Td [ 80 -2 73 < Td [ 80 0 70 < Td [ 75 -2 0 70 < Td [ 75 -5 -2 70 < Td [ 75 -2 65 < Td [ 73 -2 65 < Td [ 70 -2 -3 65 < Td [ 70 -5 -2 60 < Td [ 70 -5 60 < Td [ 65 -5 60 < Td [ 65 -2 -3 Td [ 65 -5 -2 Td [ 60 -5 Td [ 60 -5 Td [ 60 -5 -12 - - 100 < Td - 100 < Td - 10 - - 10 - ❈ For capacity class 12(13) or 18 in single-unit operation, the stabilized range shifts to the next higher level. I. e. Cooling : 85<Td< =92 Heating : 80<Td< =91 ( ) ③ LEV opening correction by gas pipe temperature (effective in cooling operation only.) (1) Maximum correction width : +14 pulse (2) Single correction width : 1, 2, or 3 pulse (3) Control details 1) S.H. HEX of each operating unit is calculated by using the following formula. S.H. HEX (i) = (Gas pipe temperature (i)) - (Evaporation temperature) 2) The minimum valve is selected from each S. H. HEX. 3) From S. H. HEX (i) calculated in step 1) and the minimum value obtained in step 2), the difference of each S. H. HEX (∆S. H. HEX (i)) is calculated as follows. ∆S. H. HEX (i) = (S. H. HEX (i) - S. H. HEX (min)) 4) Each LEV opening is controlled based on ∆S. H. HEX (i) obtained in step 4). ∆S. H. HEX (i) and LEV control width Range of ∆S. H. HEX (i) ∆S. H. HEX (i)< =3 deg 3<∆S. H. HEX (i)< =6 deg 6<∆S. H. HEX (i)< =9 deg 9<∆S. H. HEX (i) LEV variation for corresponding unit 0 +1 +2 +3 33 No. 2 Item Details Control by the The compressor operational frequency and the LEV opening are controlled depending on the number of operating number of operating indoor units. indoor unit (1)Compressor operational frequency • The variable range of compressor operational frequency changes according to the operation signal (capacity code and temperature difference) given from the operating indoor unit (s). When the number of operating indoor units is reduced during heating operation, the operational frequency will decrease by 20 Hz in one minute. After that, the operational frequency will return to the variable status. (2) LEV opening • The LEV opening varies according to the operation signal given from the operating indoor unit (s). When the number of operating indoor units is reduced during heating operation, the LEV opening will be fixed to the current valve for one minute. After that, the LEV opening will return to the variable status. 3 4 Selection of operation mode 1 When a single indoor unit is operating, the system operates in the mode as selected by that indoor unit. 2. When two indoor units are operating in the same mode, the system operates in that mode. 3. Simultaneous COOL and HEAR operation is unavailable within a system. The indoor unit activated earlier has the priority to decide the operation mode of the system. The other unit enters the standby status when it receives the order to operate in a different mode. To operate these units in the same mode from such a status, reset both units to the same operation mode, turned them off, and then turn them back on. 4. Simultaneous COOL and DRY operation is available within a system. In this case, the outdoor unit operates in the COOL mode. (The outdoor unit operates in the DRY mode only when all the indoor units are operating in the DRY mode.) Outdoor fan control The outdoor fan turns ON according to "Compressor ON" commands given from each indoor unit. MXZ-18NV- E1 MXZ-18NV- E2 Number of operating indoor unit One unit Two unit One unit Two unit Cooling Heating Hi Low Hi Hi Hi Hi Hi Hi Three unit Four unit MXZ-32NV- E1 E2 Number 05 operating Total indoor capacity code unit One unit Two unit Low Low 1 2 3 4 5 6 7 8 9 10 Me Me Me Indoor unit capacity class 07/09 12(13) 18 Capacity code 1 3 4 ❈ The outdoor fan is controlled at High speed for the first 10 seconds after startup. In addition, the outdoor fan speed temporarily changes to High during the compressor and inverter protection. a) Compressor shell overheat protection When a single unit is operating in a system with the LEV fully open and the discharge temperature at 95; or above, the outdoor fan speed changes to High. It is released when the number of operating indoor units has changed, the operation mode has changed, or the power has turned OFF. b) Inverter overheat protection When the fin temperature thermistor detects 88; or above, the indoor fan speed changed to High. It is released when the compressor has turned OFF. c) After defrosting during heating operation, the outdoor fan speed shifts to the next higher level. I. e. Low to Me Me to High ( 34 ) No. 5 Item Operational frequency range Details Compressor operational frequency range ① COOLING MXZ-18NV- E1 Number of Indoor unit operating unit capacity class 1 2 09 09+09 Minimum Maximum DRY mode 34 34 58 80 43 43 Rating 43 76 MXZ-18NV- E2 Number of Indoor unit operating unit capacity class 1 07 or 09 2 12 07+12 or 09+09 Minimum Maximum DRY mode Rating 58 43 34 43 66 34 80 58 43 76 MXZ-32NV- E1 E2 Number of Total capacity operating unit code 1 2 3 4 1 2 3 4 2 3 4 5 6 7 8 - Minimum Maximum DRY mode Rating 52 40 30 40 73 52 90 58 75 35 58 110 40 40 120 120 105 75 75 102 102 35 No. Item Details Compressor operational frequency range ➁ HEATING MXZ-18NV- E1 Number of Indoor unit operating unit capacity class 1 2 09 09+09 Minimum Maximum 34 34 70 86 DEFROST mode Rating 70 86 43 82 DEFROST mode Rating MXZ-18NV- E2 Number of Indoor unit operating unit capacity class 1 07 or 09 Minimum Maximum 34 70 70 12 2 09+09 62 66 34 86 86 07+12 82 84 MXZ-32NV- E1 E2 Number of Total capacity operating unit code 1 2 3 4 36 1 2 3 4 2 3 4 5 6 7 8 - Minimum Maximum DEFROST mode Rating 58 45 73 65 30 95 105 58 75 40 48 48 115 107 120 120 112 105 6 Defrosting in heating <Conditions to start defrosting> The system starts defrosting when it satisfies both of the following conditions : ① The defrost thermistor detects -3°C or below. ➁ Defrost interval (I. e. the accumulated compressor operation time) counted by the controller board has reached the prescribed value. <Details of defrosting> ① The compressor stops for 32.5 seconds and the indoor fan turns OFF. ➁ The 4 - way value reverses and the compressor runs at the defrosting frequency. ③ After the defrosting termination conditions are satisfied, the compressor stops for 32.5 seconds and the 4 - way valve reverses. This is the end of defrosting. <Conditions to terminate defrosting> The system terminates defrosting when it satisfies, either of the following conditions : ① The defrost thermistor detects +10°C or above. ➁ Defrosting time has reached 10 minutes. 7 High and low (1) High pressure protection in heating pressure protection • The operational frequency, 2 - way valve (only MXZ-32NV), and outdoor fan motor are controlled according to the indoor coil temperature. When it rises to nearly 50°C, the operational frequency will be fixed to the value at the moment and the outdoor fan speed will change to low. When it rises to nearly 53°C, the operational frequency will be reduced by 4 Hz from the current value and the 2 - way valve will open. (2) High pressure protection by high pressure switch (H.P.S : MXZ-18NV , 63H1 : MXZ-32NV) • The operational frequency, 2 - way valve (only MXZ-32NV), and outdoor fan motor are controlled by the high pressure switch to protect excessive high pressure. <Condition to active the protection> The high pressure protection starts when the high pressure switch turns ON, that is the discharge 0.05 0.5 pipe pressure rises to 2.75 +- 0.1 MPa (28 +- 1.0 kg/cm2) or above. No. Item Details <Protection details> a) In COOL or DRY mode • The 2 - way valve opens. • The compressor operational frequency decreases at a rate of 10 Hz/minute. b) In HEAT mode • The 2 - way valve opens. • The compressor operational frequency decreases at a rate of 10 Hz/minute. • The outdoor fan runs at the Low speed. <Condition to release the protection> The protection is released when the high pressure switch turns OFF, that is, the discharge pipe pressure falls to 2.4±0.15MPa (24.5 ± 1.5 kg/cm2) or below. (3) Low pressure protection by low pressure switch (only MXZ-32NV) • The compressor ON/OFF, operational frequency, 2 - way valve, and LEV opening are controlled by the low pressure switch to protect excessive low pressure. <Condition to active the protection> The protection starts when the low pressure switch turns ON, that is, the suction pipe pressure falls to 0.05 ± 0.04MPa (0.5 ± 0.4 kg/cm2) or below. <Protect details> • The 2 - way valve opens. • The compressor operational frequency decreases at a rate of 10 Hz/minute. • The LEV opens at a rate of 20 pulse/minute. When such a status has continued for five minutes, the compressor will turn OFF and the error content will be displayed. <Condition to release the protection> The protection is released when the low pressure switch turns OFF, that is, the suction pipe pressure falls to 0.15±0.04MPa (1.5 ± 0.4 kg/cm2). (4) High pressure protection by high pressure switch (63H2 : MXZ-32NV ) • The compressor is turned OFF by the high pressure switch to prevent excessive high pressure. <Condition details> The compressor stops operation. <Condition to release the protection> • The compressor is turned OFF once and turned ON again. 37 No. 8 Item Discharge temperature protection Details • The compressor ON/OFF and operational frequency are controlled according to the discharge temperature. (1) Compressor ON/OFF The compressor turns OFF when the discharge temperature thermistor rises above 120°C. The compressor turns ON when the discharge temperature thermistor falls below 80°C. (2) Compressor operational frequency When the estimated discharge temperature is high than 120°C, the compressor operational frequency will decrease by 8 Hz from the current operational frequency. When the estimated discharge temperature is over 115°C to 120°C inclusive, the compressor operational frequency will decrease by 4 Hz from the current operational frequency. When the estimated discharge temperature is over 107°C to 115°C inclusive, the compressor operational frequency will be fixed to the current operational frequency. 9 Refrigerant recovery <Conditions to active refrigerant recovery> in heating The system activates refrigerant recovery when it satisfies all the following conditions : • One or more indoor unit are standstill during heating operation. (It does not include the "Thermostat OFF" starts.) • The discharge temperature rises to 107°C or above. • Sixty minutes or more have passed since the operation start-up or the last refrigerant recovery. <Control details> • The LEV opening is controlled at 80 pulse for the non-operating indoor unit(s). <Conditions to discontinue refrigerant recovery> The system discontinues refrigerant recovery when it satisfies either of the following conditions. Then the LEV opening is controlled to 59(MXZ-32NV) / 49(MXZ-18NV) pulse. • Sixty seconds have passed since the start-up of refrigerant recovery. • The discharge temperature falls to 90;(MXZ-32NV) / 100;(MXZ-18NV) or below. 10 Sensors and actuators Relation between major sensors and actuators. Actuator Sensor Purpose Compressor Discharge temperaProtection ture thermistor Defrost thermistor Defrosting Suction temperature thermistor Control Evaporation temperature thermistor Control Gas pipe temperature thermistor Control High pressure switch Protection Low pressure switch Protection (MXZ-32NV) Fin temperature thermistor Capacity code 38 Protection Control LEV Outdoor fan motor 4 - way valve 2-way valve (MXZ-32NV) 11 11.1 11.1.1 11.1.2 11.1.3 11-2 TROUBLESHOOTING Cautions on troubleshooting Before troubleshooting, check the followings : 1) Check the power supply voltage. 2) Check the indoor / outdoor connecting wire for mis-wiring. Take care the followings during servicing. 1) Before servicing the air conditioner,be sure to first turn off the remote controller to stop the main unit,and then after confirming the horizontal vane is closed,turn off the breaker. 2) When removing the P.C. board, hold the edge of the board with care NOT to apply stress on the components. 3) When connecting or disconnecting the connectors, hold the housing of the connector, DO NOT pull the lead wires. Troubleshootina procedure 1) First, check if the POWER LAMP on the indoor unit is flashing to indicate an abnormality. To make sure, check the abnormality indication for 2 or 3 times before starting service work. 2) If the P.C. board is supposend to be defective, check the copper foil pattern for disconnection and the components for bursting and discoloration. 3) When troubleshooting, refer to the flow chart and the check table . Troubleshooting procedure Operation start The indoor unit will not respond to the remote controller. The indoor unit will not respond to the remote controller. In addition, the operation indicator (on the left-hand side)will not blink even if the emergency run switch is pressed. The operation indicator (on the left-hand side) is blinking Indoor controller board Remote controller and receiver board. Six blinks Two blinks Single blink 2.5 second OFF 2.5 second OFF Three blinks Seven blinks 2.5 second OFF Causes in the indoor unit. • Indoor fan motor abnormality. Pipe temperature thermistor abnormality. • Room temperature thermistor abnormality. Causes in the indoor/outdoor unit • Incorrect wiring • Serial signal error Serial signal (Page 42) See note 1 • Check the indoor/ outdoor connecting wiring. • Check the outdoor power supply. 2.5 second OFF • Pipe temperature thermistor • Room temperature thermistor Causes in the outdoor unit • Outdoor thermistor abnormality. Causes in the outdoor unit • Outdoor control system error F Outdoor thermistor See page 46. Indoor fan motor NOTE1:In case of serial signal error, the mis-wiring indication will apper by turning the power off and turning it back on. NOTE2:Enclosed by the broken line are the indoor unit related parts. Inverter Compressor A to E Compressor See page 44,45. A to E Transistor module See page 44,45. J Power supply See page 47. Outdoor board G 4-way value coil. See page 46. Linear H Outdoor fan • High pressure expansion motor. valve See page 47. switch Only MXZ-32NV • Low pressure switch • Compressor thermostat 39 <Outdoor controll board> (1) Troubleshooting table Note 1. LED position is shown at right. Note 2. LED indicates "00" in the normal status. 7-segment LED display 00 Microprocessor Error mode Normal 8 8 LED1 ❈ <MXZ-32NV> If there is defect in the following parts(electronic control P.C. board, relay P.C. board, high pressure switches(63H1,63H2),indoor /outdoor fan motor , or indoor coil thermistor), the compressor may stop even with the display remained at “ 00 “.In any case, reset the breaker and check the above-stated parts. Symptom Display Outdoor unit does not operate. Detecting method 40 Check points Outdoor power system abnormality When the compressor operation has been interrupted by overcurrent • Inverter output protection continuously three times within 1 minute after start-up, the • Compressor compressor stops operation. Outdoor refrigerant system abnormality (LEV abnormality) • Amount of gas When the compressor operation has been interrupted by LEV protection • Outdoor control P. C. board continuously five times, the compressor stops operation. • Contact of LEV board connectors Outdoor controller board abnormality When the nonvolatile memory data cannot be read properly on the • Outdoor control P.C. board outdoor controller board Compressor temperature abnormality • Outdoor air cycle • Amount of gas When the compressor has remained OFF for continuous thirty minutes • Outdoor fan motor by inner thermostat function • Outdoor heat exchanger (dust adherence) Indoor unit and LEV abnormality When the drain abnormality is detected in the indoor unit and the indoor • Check the abnormality indication on the main coil temperature is too low, or when any abnormality is detected in indoor unit. the components of indoor unit • LEV Symptom Display Detecting method Outdoor unit stops and restarts every 3 minutes. Detecting method Detecting method Check points Suction temperature thermistor abnormality • Check the characteristic of the suction temperature thermistor. Refer to F on The compressor stops when a short or open circuit occurs in the suction page 46. temperature thermistor during compressor running. • Check the contact of P. C. board connectors. Evaporation temperature thermistor abnormality The compressor stops when a short or open circuit occurs in the evaporation temperature thermistor during compressor running. • Check the characteristic of the evaporation temperature thermistor. Refer to F on page 46. • Check the contact of P. C. board connectors. Discharge temperature thermistor abnormality The compressor stops when a short or open circuit occurs in the discharge temperature thermistor during compressor running. • Check the characteristic of the discharge temperature thermistor. Refer to F on page 46. • Check the contact of P. C. board connectors. Fin temperature thermistor abnormality The compressor stops when a short or open circuit occurs in the fin temperature thermistor during compressor running. • Check the characteristic of the fin temperature thermistor. Refer to F on page 46. • Check the contact of P.C. board connectors. Overcurrent protection • Check the inverter and compressor. Refer to A to E on page 44,45. When 40 A or more current is applied to the power module, the • Check the amount of gas. compressor stops and restarts in 3 minutes. • Check the indoor/outdoor air flow for short cycle. • Check the indoor unit air filter for clogging Discharge temperature overheat protection When the discharge temperature thermistor detects 120˚C or above, the • Check the amount of gas and the compressor stops and restarts operation in 3 minutes. refrigerant cycle. • Check the outdoor unit air passage. ((Protection will be released at 80; or below.) Fin temperature overheat protection • Check the outdoor unit air passage. When the fin temperature thermistor detects 88˚C or above, the • Check the power module. compressor stops and restarts operation in 3 minutes. • Check the outdoor fan motor. Refer to H on page 47. 2 1 p4 Low pressure switch protection Low discharge temperature protection Compressor stop by thermostat function Symptom Display 8 9 • Check the ball valve. When the low pressure has been 0.05Mpa(0.5 kgf/cm2-G) for 5 minutes • Check the pipes for bending or clogging or more, the compressor stops and restarts in 3 minutes. • Check the LEV operation. • Replace the outdoor controller board. • Check the amount of gas. When the discharge temperature has been 35˚C or below for 50 • Replace the outdoor controller board. minutes or more, the compressor stops and restarts operation in 3 • Check the contact of LEV board minutes. connectors. • Check the inverter output. Refer to A to E. • Check the compressor. When the compressor inner thermostat detects 130˚C or above, the • Check the amount of gas. compressor stops and restarts operation in 3 minutes. • Check the indoor unit air filter for clogging. • Check the indoor/outdoor air flow for short cycle. Outdoor unit operates. (The compressor operates at reduced frequency.) Detecting method Detecting method Check points Frequency drop by current protection When the outdoor unit input current exceeds 22.5 A, the compressor operates at reduced frequency. Frequency drop by overload protection Frequency drop by defrosting in cooling When the compressor load exceeds the specified value, the These symptoms do not mean any abno compressor operates at reduced frequency. mality of the product, but check the When indoor pipe temperature exceeds 55˚C during heating, the follingpoints. compressor operates at reduced frequency. • Air filter clogging • Amount of gas When the indoor pipe temperature falls to 6˚C or below during cooling, • Short cycle of indoor/outdoor air flow the compressor operates at reduced frequency. 6 Frequency drop by discharge temperature protection When the discharge temperature exceeds 115˚C, the compressor operates at reduced frequency. 3 Frequency drop by high pressure switch protection When the high pressure exceeds 2.75MPa (28 kgf/cm 2-G), the • Amount of gas compressor operates at reduced frequency. In addition, the two-way • Outdoor unit air passage valve reverses and the fan speed changes. 2 Frequency drop by low pressure switch protection • Ball valve When the low pressure falls to 0.05Mpa or below, the compressor • LEV operation operates at reduced frequency. In addition, the two-way valve opens. • Pipe bending or clogging • Outdoor control P.C. board 7 Frequency drop by high pressure protection Symptom Display Outdoor unit operates. Detecting method Detecting method Check points 7 When a short or open circuit occurs in the defrost thermistor during • Defrost thermistor characteristic Defrost thermistor abnormality heating • Contact of P. C. board connectors * In this case, the compressor continues to operate. 5 Room-A pipe temperature thermistor abnormality When a shot or open circuit occurs in the Room-A pipe temperature • Room A pipe temperature thermistor thermistor characteristic * In this case, the compressor keeps running. • Contact of P.C. board connectors 6 Room-B pipe temperature thermistor abnormality • Room B pipe temperature thermistor When a short or open circuit occurs in the Room-B pipe temperature characteristic thermistor • Contact of P.C. board connectors * In this case, the compressor keeps running. 7 Room-C pipe temperature thermistor abnormality When a short or open circuit occurs in the Room-C pipe temperature • Room C pipe temperature thermistor thermistor characteristic * In this case, the compressor keeps running. • Contact of P.C. board connectors 9 Room-D pipe temperature thermistor abnormality When a short or open circuit occurs in the Room-D pipe temperature • Room D pipe temperature thermistor thermistor characteristic * In this case, the compressor keeps running. • Contact of P.C. board connectors 4 Power factor detection abnormality When the compressor power factor cannot be detected * In this case, the compressor keeps running. 2 Shell temperature overheat protection When the discharge temperature rises to 95˚C or above in single-unit • Outdoor unit air passage cooling operation, the outdoor fan speed changes. • Pipe length Dry protection This symptom does not mean any When five degrees or more of temperature difference have been abnormality in the product, but check the detected between the indoor main temperature and the auxiliary pipe followings. temperature for 10 minutes, the target discharge temperature is • Amount of gas reduced. • Pipe length 6 • Compressor wiring 41 (2) Checking the mis-wiring and serial signal error (Only MXZ-32NV) <The outdoor unit does not operate.> Single or repeated blinks appears on the operation indicator (on the left-hand side). ❈ Using the light emitting diode LED1 on the indoor controller board (See the indoor unit service manual) , locate the defect in the following procedure. After checking the indoor unit, check the outdoor unit as follows. For the indoor unit inspection, refer to the appropriate service manual. Measure the voltage between the appropriate connector terminals on the outdoor controller board depending on the indoor unit indicating the serial signal error. • When the indoor unit for Room A is indicating the serial signal error : Is there voltage of 5 to 10 V DC between pin 1 (+) and pin 2 (-) at connector CN601? • When the indoor unit for Room B is indicating the serial signal error : Is there voltage of 5 to 10 DC between pin 1 (+) and pin 2 (-) at connector CN602? • When the indoor unit for Room C is indicating the serial signal error : Is there voltage of 5 to 10 DC between pin 1 (+) and pin 2 (-) at connector CN603? • When the indoor unit for Room D is indicating the serial signal error : Is there voltage of 5 to 10 DC between pin 1 (+) and pin 2 (-) at connector CN604? Yes Outdoor controller board Yes Disconnect the short circuit between tab terminals as before. Is the LED1 lighting on the outdoor controller board? No No lighting Check the indoor/outdoor connecting wire, the unit signal 1 wire, and the outdoor terminal block. Yes No • • • • • • 42 Reactor Diode stack Power factor capacitor Smoothing capacitor Rush current control circuit IPM board } faulty Is there 12 V DC between pin 1 and pin 2 at connector CN801 on the outdoor controller board? (3) Troubleshooting the components (Simple check method for main components) Part name Check method and criterion Defrost thermistor Suction / Evaporation / Gas pipe temperature thermistor Discharge temperature thermistor RED V WHT Normal 100kΩ ~ 250kΩ Normal MXZ-18NV 143.0Ω ~ 176.0Ω 63.0Ω ~ 78.0Ω 31.0Ω ~ 39.0Ω WHT - BLK WHT - BLK BLK - YLW YLW - BLU RED - BLK YLW - RED ORN RED BLU YLW BLK MXZ-32NV MXZ-18NV abnormal Opened or short-circuited Measure the resistance between lead wires using a tester. (Part temperature : -10°C ~ 40°C) P ORN RED YLW BLK abnormal Opened or short-circuited Normal MXZ-18NV MXZ-32NV Each phase 1.05Ω ~ 1.29Ω Each phase 0.47Ω ~ 0.58Ω WHT WHT abnormal Opened or short-circuited Measure the resistance using a tester, after warming up the thermistor by holding by hand. (Part temperature : 20°C ~40°C) U BLK Outdoor fan motor P Normal 5kΩ ~ 55kΩ Measure the resistance between terminals using a tester. (Winding temperature : -10°C ~ 40°C) Compressor W Measure the resistance using a tester. (Part temperature -10°C ~ 40°C) abnormal MXZ-32NV 69.0Ω ~ 86.0Ω 23.0Ω ~ 30.0Ω 10.0Ω ~ 13.0Ω 73.0Ω ~ 91.0Ω - Opened or short-circuited (Not including WHT - ORN) Measure the resistance using a tester. (Part temperature -10°C ~ 40°C) Normal Reversing valve coil MXZ-18NV 1320Ω ~ 1620Ω <Only MXZ-32NV> Solenoid coil Linear expansion valve YLW WHT abnormal Opened or short-circuited MXZ-32NV 1190Ω ~ 1715Ω Measure the resistance using a tester. (Part temperature -10°C ~ 40°C) Normal 873Ω ~ 1068Ω abnormal Opened or short-circuited Measure the resistance using a tester.(Part temperature -10°C ~ 40°C) Lead wire color BLU ORN WHT - RED RED - ORN YLW - RED RED - BLU RED Normal MXZ-18NV MXZ-32NV 22 ~ 29Ω 21 ~ 26Ω Abnormal Opened or short-circuited Measure the resistance using a tester. (Part temperature -10°C ~ 40°C) High pressure switch (HPS) Low pressure switch (LPS) Compressor thermistor ❈ Only MXZ-32NV HPS1 HPS2 ❈ LPS HPS1 ❈ HPS2 ❈ LPS ❈ Pressure (HPS, LPS) Operation OFF 2.35 ± 0.15MPa (24 ± 1.5kg / cm2) 2.55 ± 0.2MPa (26 ± 2kg / cm2) 0.15 ± 0.05MPa (1.5 ± 0.5kg / cm2) 2 + 0.5 2.75 +- 0.05 0.1 MPa (28 - 1.0 kg / cm ) 2 + 0 0 + 3.43- 0.15 MPa (35 - 1.5 kg / cm ) 0.05 ± 0.04MPa (0.5 ± 0.4kg / cm2) Inner thermistor Normal Operation OFF 108 ± 11°C 130 ± 5°C Short Open abnormal Other than those listed at left 43 (Simple check methods for inverter / compressor) Disconnect the compressor lead wire. Start Check the voltage between the terminals. Proceed to the A for checking for open phase. Check the resistance of No the transistor module Balanced? Yes Proceed to the compressor check. Proceed to C Proceed to B for checking the transistor module. Infinite Replace the outdoor controller board. Zero to dozens of ohms Replace the transistor module and outdoor controller board in a set. A Checking for open phase Be sure to use the analog tester for measurement. • With the lead wire disconnected, activate the inverter and check the balance of voltage between terminals. Operation mode COOL HEAT Operational frequency (Hz) 58 40 Output voltage (V) 110 70 <Operation method> Perform the test run in the heating mode by using the emergency run switch on the indoor unit. <Measure point> Measure the AC voltages at the following three points on the transistor module • BLK - WHT • BLK - RED • WHT - RED <Judgment> Balanced : Normal Unbalanced : Faulty (Open phase) Shut off by overcurrent : Faulty (Short) Tester indication BLK-WHT ACV BLK-RED ACV 300 BLK-WHT ACV ACV 300 BLK-RED ACV 300 WHT-RED Normal (balanced) 300 WHT-RED ACV 300 300 Faulty (unbalanced) NOTE 1 : After the outdoor fan starts running, wait for one minute or more before measuring the voltages. NOTE 2 : The output voltage values in the above table have the tolerance of ± 20%. B Checking the resistance of transistor module • Disconnect the lead wires and check the resistance of terminals at the transistor module. <Measure points> Tester indication Measure the AC voltage at the following six points on the transistor module. BLK - WHT, WHT - BLK Normal BLK - RED, RED - BLK X1 (Infinite) WHT - RED, RED - WHT <Judgment> Infinite (Ω) : Normal Faulty Zero to dozens (Ω) : Faulty (Short) (Zero to dozens of ohms) X1 44 C Checking the compressor Check the resistance of compressor Between one and dozens of ohms? Proceed to D for checking the compressor winding. Compressor No short / open circulit Replace the compressor. Yes Check the operation time Continuous operation? Proceed to E for checking the compressor operation. No Compressor layer-short or lock.Refrigerant circuit defective. Replace the compressor. Check the refrigerant circuit. Yes Normal D Checking the compressor winding Disconnect the lead wires and check the resistance between the compressor terminals. <Measuring points> Tester indication Measure the AC voltages at the following three points on the transistor module. BLK - WHT BLK - RED Normal X1 WHT - RED (One to dozens of ohms) <Judgment> 1.05 ~ 1.29Ω (MXZ-18NV), 0.47 ~ 0.58Ω (MXZ-32NV) at -10 °C ~ 40 °C of winding temperature. Faulty X1 (Zero ohms or short) Zero (Ω) : Faulty (Short) Infinite (Ω) : Faulty (Open) NOTE 1 : Be sure to zero the tester before measurement. Faulty NOTE 2 : The winding resistance is 1.2Ω(MXZ-18NV),0.54Ω(MXZ-32NV) X1 (Infinite or open) at 20°C for each phase. E Checking the compressor operation • Connect the compressor, activate the inverter, and count time until the inverter stops due to overcurrent. <Operating method> Perform the test run in the cooling or heating mode by using the emergency run switch on the indoor unit. <Measuring point> Count time from when the outdoor fan starts up until the inverter stops due to overcurrent. 0 sec. Outdoor fan start-up <Judgment> Inverter stops in 0 to 10 seconds : Faulty (Short) 10sec. Faulty (Compressor sfort or luyer-short) Inverter stops in 10 to 60 seconds : Faulty (Compressor lock) Inverter stops in 60 seconds to 5 minutes : Faulty (Refrigerant circuit defective) Faulty (Compressor lock. etc.) Inverter operates for 5 minutes or more : Normal 60sec. Faulty (Refrigerant circuit defective,etc.) 5 min. Normal 45 (Simple check method for main components) F Checking the outdoor thermistors Outdoor thermistor abnormality MXZ-18NV Disconnect the connectors CN641, CN661 and CN681,CN682,CN683 from the outdoor controller. MXZ-32NV Disconnect the connectors CN661, CN662 and CN663 from the outdoor controller. (Check the characteristic of thermistors.) Measure the resistance between pin3 and pin4 at CN641(MXZ-18NV) pin1 and pin2 at CN661(MXZ-32NV) Defrost thermistor As per the Characteristic Chart? (See page 49, 51 .) Measure the resistance between pin3 and pin4 at Discharge CN661(MXZ-18NV) temperature pin1 and pin2 at thermistor CN661(MXZ-32NV). Yes No Thermistor damaged No As per the Characteristic Chart? Yes (See page 49, 51 .) Measure the resistance between pin1and pin2, 3 and 4, 5 and 6, and Gas pipe temperature at CN662 respecthermistor tively (MXZ-18NV) pin1 and pin2 at CN661 (MXZ-32NV). Suction Evaporation temperature thermistors Measure the resistance between pins 5 and 6 at CN661, and pins 7 and 8 at CN662 respectively (MXZ-18NV) pin1 and pin2 at CN661 (MXZ-32NV). 1 Connect the connections CN661, CN681, CN682, CN683 CN641 (MXZ-18NV),CN661, CN662, and CN663 (MXZ-32NV). 2 Disconnect the compressor lead wire. Turn on POWER to the indoor and outdoor unit Defrost Thermistor Is there voltage of 2.5 to 4.0V DC across R641(MXZ-18NV), R642(MXZ-32NV)? No Disconnect the connector (Poor connection.) Yes As per the Chara- Yes cteristic Chart? (See page 49, 51 .) Measure the voltage between terminals on the outdoor controller board. Evaporator/ suction temperature thermistor. No Is there voltage of 2.5 to 4.0V DC between terminals of R681 and R682 ? No Thermistor damaged Measure the Fin temperature resistance thermistor between pin1 and pin2 at CN663 (MXZ-18NV) pin1 and pin2 at CN661 (MXZ-32NV). Outdoor controller Discharge Yes board defective thermistor Is there voltage of 0.3 to 0.6VDC across R685(MXZ-18NV), R652(MXZ-32NV) at No 11; to 36; of outside temperature? No As per the Characteristic Chart? (See page 49, 51 .) Yes Fin temperature thermistor. Yes Is there voltage of 0.8 to 2.5V DC between terminals of R661 ? Gas pipe temperatore thermistor No Is there voltage of 2.5 to 4.0V DC between terminals of R683 and R684 ? Yes G Checking the reversing valve coil Cooling operation works when heating is expected. • First, measure the resistance of the reversing valve coil to check the integrity. • If connector CN61(MXZ-18NV), CN913(MXZ-32NV) is not connected or the reversing valve coil is open, voltage occurs between terminals even when the control is OFF. Disconnect the lead wire between compressor and IPM board. Turn on power to the indoor unit and the outdoor unit, and press the emergency switch for heating operation. 46 MXZ-18NV Three minutes after power-on. Check the voltage between pin1 No and pin2 at CN61 on the electronic control P.C. board. Is there Yes voltage of 220 to 240V AC? MXZ-32NV Three minutes after power-on. Check the voltage between pin1 and pin2 at CN913 on the noise filter board. Is there voltage of 220 to 240V AC ? Yes No Outdoor controller board or noise electronic control P.C. board detective. • Reversing valve coil lead wire defective. • Poor contact of connector. • Reversing valve coil damaged. Outdoor controller board or noise filter board detective. H Checking the outdoor fan motor The outdoor fan motor remains stopped. <MXZ-18NV> Disconnect CN63 TAB91 and outdoor electronic control P.C.board. Disconnect the connector between the compressor and the transistor module. <MXZ-32NV> Disconnect the relay connector. Disconnect t he connector (lead wire) between the compressor and the IPM board. I • First, measure the resistance of the 4-way valve coil to check the integrity. No <MXZ-18NV> Is there voltage of 220 - 240V AC between CN63 2 and 3 or 2 and 5? <MXZ-32NV> Is there voltage of 220 - 240V AC between pin2 and any of pin3, 4, 5, and 6? Turn on power to the indoor unit and the outdoor unit, the press the emergency switch for cooling or heating operation. Three minutes after power-on, check the voltage between terminals at the relay connector. Outdoor control board or outdoor relay board defective. •Outdoor fan motor lead wire defective. •Poor contact for connector •Outdoor fan motor damaged. Yes Checking the solenoid coil (Only MXZ-32NV) Poor heating/cooling. The compressor stops frequently. •First measure the resistance of the reversing valve coil to check the integrity. •If connector CN913 is not connected or the sorenoid coil is open, voltage occurs between terminals even when the control is OFF. Outdoor control board or outdoor relay board defective. Disconnect the lead wire between compressor and IPM board. Three minutes after power-on, check the v oltage between pin3 and pin4 or CN913 on the noise filter board. Is there voltage of 220 to 240V AC ? Turn on power to the indoor unit and the outdoor unit, and press the emergency switch for heating operation. No •Sorenoid coil lead wire defective. •Poor contact of connector •Sorenoid coil damaged. Yes (Checking the power supply) J Checking the power supply The inverter does not operate. Turn on power to the outdoor unit. Yes Is there voltage of 220 to 240V AC the power terminal block? No Is there voltage of 310 to 340V AC across the the smoothing capacitor? No Main electric parts defective in the circuit. Yes Activate the indoor unit emergency operation. Three minutes later does the serial signal error occur? Yes Outdoor or indoor controller board defective. No Check the powerline Refer to the serial signal check method. K Checking the rush current control circuit The outdoor unit does not operate at all or stops in short time due to over current. No Does LED light up? Yes Is the current limiting resistor disconnected? (It has 10 , if normal.) Yes Replace the current limiting resistor. ● Check No Turn on power to the outdoor unit. Main components in the circuit or outdoor controller board defective. Is the rush current liming Yes relay functioning properly? Other main components (It should close one second in the circuit or after the outdoor unit power-on, compressor defective. if normal.) No Outdoor controller board or rush current liming resistor defective. other main circuit parts at the same time when you replace the current limiting resistor. 47 L High/low pressure switch and compressor thermostat circuits No heating/cooling •Three minutes after the unit stops, check that the high and low pressure switch open and close properly. •After the unit stops, remove the sound-proof material around the compressor. •60 minutes after that, check that the compressor thermostat opens and closed properly. Open status Yes High/low pressure switch, compressor or refrigerant circuit defective. No Causes HPS LPS Compressor thermistor Gas undercharged Turn on power to the outdoor unit and press the emergency switch for cooling or heating operation. Gas overcharged Liner expansion valve Ball valve Right after compressor start-up, does the LED indication appear to show the lowspeed-operation due to high/low switch protection? Indoor air filter clogged No Pipe length too long Short cycle of outdoor air flow Yes Outdoor heat exchanger (dust adherence) Outdoor controller board defective M Checking the liner expansion valve (LEV) The outdoor control system stops due to abnormality. <MXZ-18NV> Turn OFF the power supply and make sure that LEDs on outdoor electronic control P.C. board turn OFF. Then turn ON power supply. <MXZ-32NV> Turn off the breaker and short-circuit pin1 and pin3 at CN605 on the outdoor control board. CN605 Turn on the breaker and operate the air conditioner with the remote controller. Shortcircuit LEV operates for the first 30 seconds after power supply is turned ON. While LEV is operating, check that there is 12V DC pulse amplitude between both ends oh LEV diode. Repeat this for 4 diodes each in unit A and B. •When no pulse amplitude, the outdoor electronic control P.C. board is defective. •When checking, LEV connectors must be connected. About 10 seconds after start-up, does LEV click? Yes Normal No Operation status Indoor unit:Normal Outdoor unit:Compressor and outdoor fan stop running and LEV closes repeatedly. Disconnect the LEV relay connector and check the voltage at the following points between terminals on the controller board side. Does the voltage fluctuate between 7.5 and 8.5V DC at any points? No Outdoor controller board defective Yes LEV defective (+) (–) Measuring •RED-WHT point •RED-BLU •RED-ORN •RED-YLW N Mis-wiring or mis-piping Incorrect connection of indoor units results in no cooling/heating. In the all unit operation, however, the system seems to operate normally even if wires or pipes are connected incorrectly. Therefore, use the single-unit operation, not the all-unit operation, to check mis-wiring or mis-piping. <Check of mis-wiring or mis-piping> The following symptoms appears if wires or pipes are wrongly connected. In the single-unit operation in HEAT mode, the compressor stops due to high pressure protection or it operates at the lowest frequency at the normal working temperature, causing no heating. In the single-unit operation in COOL mode, the indoor unit blows out air but it is not cooling, causing no cooling. The heat exchanger freezes in non-operating unit(s). <EFFECT> In the heating operation, the compressor stops and restarts operation too frequency due to high pressure protection, and finally gets damaged. In the cooling operation, the compressor operates with liquid back, and finally gets damaged. O The other cases 1 In the case that the indoor fan and outdoor fan operate but the compressore does not operate,it causes that the high pressure switch can be operated once. First of all,check the high pressure switch can be shorted, turn OFF the power and turn ON again 1 minute later. 2 Indoor unit dose not operate.(different modes ) • When you try to run two indoor units simultaneously, one for cooling and the other for heating, the unit which transmits signal to the outdoor units earlier decides the operation mode. The other unit indicates as shown in the figure below. • When the above situation occurs, set all the indoor units to the same mode, turn OFF the indoor units, and then turn them back ON. • Thugh the top of the indoor unit sometimes gets warm, this does not mean malfunction. The reason is that the refrigerant gas continuously flows into the indoor unit even while it is not operating. OPERATION INDICATOR Lighting 48 Frashing MXZ-18NV - E1 MXZ-18NV - E2 Ourdoor unit electronic control P.C. board 2~3V DC 2~3V DC Power supply input 330V DC 12V DC Power supply Fuse 3A Electron expansion valve 12V DC pulse shape High-pressure switch short (Normal) Evaporation temperature thermistor 2.5~4V DC Fin temperature thermistor (RT 63) Relay (X64) Suction temperature thermistor Room A coil thermistor 2.5~4V DC Outdoor fan Hi 220-240V AC Room B coil thermistor 2.5~4V DC Solenoid valve 220-240V AC Measure the voltage under the condition of the connector pluging. Discharge temperature thermistor 0.3~0.6V DC Power supply 5V DC Fuse 3.15A LED 220 / 240V Jumper wire Short : 220V Open : 240V Room B serial signal 0~24V DC Discharge temperature thermistor Room A serial signal 0~24V DC Outdoor fan, solenoid valve power supply input 220-240V AC Gas pipe temperature thermistor Evaporation temperature thermistor Suction temperature thermistor Defrost temperature thermistor Fin temperature thermistor 200 700 100 180 600 90 400 300 200 100 0 Resistance (') 500 Resistance (') Resistance (') 160 140 120 100 80 60 20 30 40 50 60 70 80 Temperature (;) 90 100 110 120 0 60 50 30 20 10 70 40 40 0 80 0 10 20 30 40 50 60 70 80 Temperature (;) 20 10 0 -20 -10 0 10 20 30 40 Temperature (;) 49 MXZ-18NV - E1 MXZ-18NV - E2 Relay P.C. board Short : Normal Open : Abnomal { 220-240V AC { Fuse 3.15A 50 Gas pipe temperature thirmistor Evaporation temperature thirmistor Suction temperature thirmistor Defrost temperature thirmistor Fin temperature thirmistor TEST POINT DIAGRAM AND VOLTAGE MXZ-32NV - E1 MXZ-32NV - E2 Resistance (') Resistance (') Electronic control P.C.board Defrost temperature thermistor 2.5~4.0V DC Suction temperature thermistor 0.3~0.6V DC Temperature(;) Evaporation temperature thermistor 2.5~4.0V DC Discharge temperature thermistor 2.5~4.0V DC Fin temperature thermistor 1.0~4.0V DC crank case heater 12V DC Temperature(;) Outdoor fan ON 12V DC Outdoor fan Lo 12V DC Outdoor fan Me 12V DC Serial signal Room D 5~10V DC { { 4 way valve 12V DC 2 way valve 12V DC Serial signal Room C 5~10V DC Serial signal Room B 5~10V DC { Serial signal Room A 5~10V DC Relay 12V DC { { 12V DC { - 5V DC + - { { Compressor inner thermo Low pressure switch High pressure switch Liner expansion valve(LEV) 12V DC puls wave Gas pipe temerature thermistor 2.5~4.0V DC Discharge temperature thermistor Resistance (') LED monitor indication Room D Room C Room B Room A { 0~5V DC { Temperature(;) 51 Noise filter P.C.board { OUTDOOR FAN 230V AC { { CRANK CASE HEATER 230V AC { 230V AC OUTPUT 230V AC INPUT { 2 WAY VALVE 230V AC { 4 WAY VALVE 230V AC I.P.M. P.C.board 12V DC { { 12V DC { Relay P.C.board { 12V DC { 12V DC { { High pressure switch Short 52 320V DC 12 DISASSEMBLY PROCEDURE 11-2 OUTDOOR UNIT MXZ-18NV - E1 MXZ-18NV - Sleeb E2 NOTE: ❈ on the wiring diagram shows the terminals with a lock mechanism, so it cannot be removed when you pull the lead wire be sure to pull the wire by pushing the locking lever (projected part) of the terminal with a finger. Protrusion of locking lever OPERATING PROCEDURE Removing the compressor (1) (2) (3) (4) Remove the top panel. Remove the service panel and release the gas. Remove the rear panel, and front panel. Disconnect the compressor linking connector. (See Photo 2.) (5) Disconnect the following connectors from the outdoor electronic control P.C. board. CN61, CN63, TAB91,CN641, CN671, CN681, CN682, CN761, CN771,CN661,CN683. (6) Disconnect the reactor lead wires from the terminal +++ of the diode stack (DS63) and from the terminal +++ of the capacitor (C67). (See Photo 3.) Note: When pulling the wire, push the locking lever of the terminal. (7) Remove the inverter assembly. (8) Remove the band that fixes the discharge pipe muffler. (See Photo 4.) (9) Remove the propeller fan. (10) Remove the separator and support. (11) Remove the reactor. (12) Remove the terminal cover to disconnect the lead wires from the compressor terminals. (13) Detach the welded section of the compressor suction pipe and discharge pipe. (See Photo 4.) (14) Remove the compressor nuts to remove the compressor. PHOTOS Photo 1 Top panel Rear panel Service panel Front panel Connect cover Separator support Photo 2 Separator Outdoor electronic control P.C. board Propeller Outdoor electric control P.C board Photo 3 Separator Reactor (in housing) Compressor linking connector Photo 4 Discharge-pipe muffler fixing band Discharge pipe welded section Terminal for diode stack (DS 67) Terminal for capacity(C 67) Suction pipe welded section 53 OPERATING PROCEDURE Removing the outdoor fan motor PHOTOS Photo 4 (1) Remove the top panel, service panel, and front panel. (2) Disconnect the connector CN63,TAB91 from the outdoor electronic control P.C. board. (3) Remove the propeller. (4) Remove the outdoor fan motor. Fan motor Propeller 54 MXZ-32NV - E1 MXZ-32NV - E2 Sleeb NOTE: ❈ on the wiring diagram shows the terminals with a lock mechanism, so it cannot be removed when you pull the lead wire be sure to pull the wire by pushing the locking lever (projected part) of the terminal with a finger. Protrusion of locking lever OPERATING PROCEDURE 1.Removing the compressor (1)Remove the screws fo the service panel, and remove it. Release refrigerant gas. (2)Remove the screws of the top panel , and remove it. (3)Remove the screws of the front panel , and remove it. (4)Disconnect the compressor lead wire.(TAB64,TAB65,TAB66) (5)Disconnect the ourdoor controller board connectors CN791, CN792, CN723, CN722,CN662, and CN661.Disconnect the noise filter board connectors CN913, CN912, and CN911. (6)Remove the four screws of the electrical parts , and remove them. (7)Remove the propeller. (8)Remove the screws of the separator, and remove it. (9)Detach the brazed joints of the compressor suction and discharge pipes.(See Photo 3.) (10)Remove the three compressor nuts and remove the compressor. PHOTOS Photo 1 Top panel Service panel Front panel Photo 2 Control P.C.board Electrical parts 2.Removing the fan motor (1)Remove the top panel(five screws),the service panel(four screws),and the front panel (two screws).(See Photo 1.) (2)Disconnect the connector CN911 on the outdoor controller board. (3)Remove the propeller. (4)Remove the fan motor. Sepatator Terminal Photo 3 Suction pipe braxed part Discharge pipe brazed part 55 OPERATING PROCEDURE 3.Removing the 4-way valve (1)Remove the screws of the top panel , and remove it.(See Photo 1.) (2)Remove the service panel,rear panel,and connect cover panel.Release refrigerant gas. (3)Remove the electrical parts.(See Photo 2.) (4)Detach the brazed joint of 4-way valve and pipe.(See Photo 4.) PHOTOS Photo 4 4 way valve 4 way valve coil Brazing area 4.Removing the linear expansion valve (1)Remove the service panel.(See Photo 1.) (Gas release is not required if the unit is pumped down.) (2)Remove the coil of linear expansion valve. (3)Detach the brazed joint of linear expansion valve and pipe. Photo 5 Linear expansion valve coil Linear expansion valve 5.Removing the reactor (1)Remove the five screws of the top panel , and remove it.(See Photo 1.) (2)Disconnect the reactor lead wire. (3)Remove the two screws of the reactor , and take it out. 56 Photo 6 Reactor 13 PARTS LIST OUTDOOR UNIT STRUCTURAL PARTS MXZ-18NV - E1 MXZ-18NV - E2 Symbol No. Parts Name Parts No. Q'ty / unit MXZ-18NV in Wiring Diagram Remarks E1 E2 1 1 1 M21 LL4 232 2 M21 LL4 521 FAN GUARD M21 LL4 297 TOP PANEL 1 1 1 1 M21 LL4 245 SERVICE PANEL R01 A00 662 SIDE PANEL 1 1 1 1 M21 LL4 248 REAR PANEL M21 LL4 523 REAR GUARD 1 1 1 1 M21 SJ4 630 OUTDOOR HEAT EXCHANGER M21 SJ4 290 BASE ASSEMBLY 1 1 3 4 5 6 7 8 9 FRONT PANEL 1 1 10 T2W A70 009 HANDLE 11 T2W A69 009 HANDLE 2 2 1 1 12 T2W A70 515 MOTOR SUPPORT 13 T2W A70 212 LABEL 1 1 1 1 1 1 14 T92 669 452 COMPRESSOR MC RHV - 207FEM 57 OUTDOOR UNIT FUNCTURAL PARTS MXZ-18NV - E1 MXZ-18NV - E2 Part number that are circed is not shown in the illustration. No. Parts No. Parts Name Symbol Q'ty / unit in Wiring MXZ-18NV Diagram 1 M21 LL4 501 PROPELLER T2W E41 301 OUTDOOR FAN MOTOR M21 LL4 488 EXPANSION VALVE (COIL) Remarks E1 E2 1 1 MF 1 1 LEV. A 1 1 LEV. B 1 1 2 2 M21 SJ4 667 UNION (3/8F) M21 SJ4 666 UNION (1/4F) 2 2 2 2 T2W A64 668 BALL VALVE (3/8) T7W 250 403 REVERSING VALVE 2 2 1 1 1 1 1 1 12 M21 LL4 938 MUFFLER 13 M21 986 936 CAPILLARY TUBE ([4.0✕[2.4✕2000) ✽ 1 1 1 1 M21 L11 936 CAPILLARY TUBE ([2.0✕[0.6✕1000) ✽ 1 1 2 3 4 M21 LL4 487 EXPANSION VALVE (COIL) M21 LL4 646 EXPANSION VALVE 5 6 7 8 9 10 T2W E41 646 HIGH PRESSURE SWITCH 11 M21 LL4 939 ACCUMULATOR 14 HPS RA6V50- [4.0✕[2.4✕300 [4.0✕[2.4✕400 [2.0✕[0.6✕500 ✽ When servicing, cut the tube to the proper length as shown in the REFRIGERANT SYSTEM DIAGRAM. 58 OUTDOOR UNIT ELECTRICAL PARTS MXZ-18NV - E1 MXZ-18NV - E2 15 16 19 Part number that are circed is not shown in the illustration. No. 1 2 3 4 5 6 7 8 Parts No. Parts Name Symbol Q'ty / unit in Wiring MXZ-18NV Remarks Diagram E1 E2 M21 A19 447 DIODE MODULE M21 U48 362 CURRENT DETECTING RESISTOR DS63 1 1 R65 1 1 T2W E22 341 DIODE STACK T2W A70 356 SMOOTHING CAPACITOR DS61 1 1 C67 1 1 100+ 400V 1800+ 400V T2W A70 357 POWER FACTOR CAPACITOR M21 LL4 424 NOISE FILTER T2W E55 309 FIN TEMPERATURE THERMISTOR M21 V47 443 POWER TRANSISTOR MODULE 9 T2W E41 375 TERMINAL BLOCK 10 T2W E41 376 TERMINAL BLOCK T2W E41 451 ELECTRONIC CONTROL P.C. BOARD 11 T2W E55 451 ELECTRONIC CONTROL P.C. BOARD 12 T2W E41 441 RELAY P.C. BOARD C61 1 1 NF61 1 1 RT63 1 1 TR 1 1 TB 1 1 TB 2 2 1 1 1 1 L 1 1 21S4 1 1 15 T2W E41 307 SUCTION TEMPERATURE THERMISTOR 16 T2W E41 308 DEFROST TEMPERATURE THERMISTOR RT66 1 1 RT61 1 1 T2W LL4 309 DISCHARGE TEMPERATURE THERMISTOR T2W E55 309 DISCHARGE TEMPERATURE THERMISTOR 18 T2W E22 425 NOISE FILTER RT62 1 13 T2W A70 337 REACTOR 14 T2W E41 398 R.V. COIL 17 19 T2W E41 306 GAS PIPE TEMPERATURE THERMISTOR RT62 SUCTION EVAPORATION 1 NF62 1 1 RT64,65 1 1 59 OUTDOOR UNIT STRUCTURAL PARTS MXZ-32NV - E1 MXZ-32NV - E2 Part of circled number is not shown in the figure. Symbol No. Parts No. Parts Name 2 3 4 5 6 7 8 M21 17A 501 PROPELLER T2W E40 301 OUTDOOR FAN MOTOR T2W E40 452 IPM P.C. BOARD M21 17A 447 DIODE STACK M21 17A 443 DIODE MODULE M21 17E 337 REACTOR T2W E40 357 POWER FACTOR CAPACITOR T2W E40 356 SMOOTHING CAPACITOR 9 T2W E40 451 CONTROL P.C. BOARD 10 T2W E40 424 NOISE FILTER BOARD 11 M21 37A 376 TERMINAL BLOCK 12 T2W E28 375 TERMINAL BLOCK 13 M21 42A 340 RELAY 14 M21 42E 307 GAS PIPE TEMPERATUR THERMISTOR 15 M21 42A 308 FIN TEMPERATURE THERMISTOR 16 T2W E40 646 H.P. SWITCH 17 M21 17A 362 RESISTOR 18 M21 41V 308 THERMISTOR 19 T2W E40 389 SOLENOID COIL 20 T2W E40 441 RELAY P.C. BOARD 60 MXZ-32NV in Wiring Remarks E1 E2 1 1 1 1 1 1 DS62 1 1 DS61 1 1 L 1 1 C61 1 1 200+ 400V C62,C63 2 2 200+ 400V 1 1 1 1 TB3 4 4 TB2 1 1 Diagram 1 Q'ty / unit MF61 X64 1 1 RT66,67,68,69 1 1 RT63 1 1 63H2 1 1 R 1 1 RT61,62,64,65 1 1 SUCTION ,EVAPORATION DISCHARGE,DEFROST 21S4,21S2 1 1 SOLENOID,R.V./SET A,B,C,D 3.43MPa(35kg/j) OUTDOOR UNIT FUNCTIONAL PARTS MXZ-32NV - E1 MXZ-32NV - E2 19 20 17 18 Part of circled number is not shown in the figure. No. Parts No. Parts Name Symbol Q'ty / unit in Wiring MXZ-32NV E1 E2 M21 17A 232 FRONT PANLE M21 17A 245 SERVICE PANEL 1 1 1 1 M21 17A 249 SIDE PANEL M21 17A 297 TOP PANEL 1 1 1 1 T2W E40 523 REAR GUARD T2W E40 248 REAR PANEL 1 1 1 1 T2W E40 247 C. COVER T7W 250 403 REVERSING VALVE 1 1 1 1 63L 1 1 63H1 1 1 Diagram 1 2 3 4 5 6 7 8 Remarks 9 M21 17A 647 L.P. SWICH 10 M21 B20 646 H.P. SWICH 11 M21 17A 640 2 WAY VALVE 1 1 12 M21 42E 644 UNION 13 M21 41V 651 EXPANSION VALVE 1 1 1/2,3/8,1/4 SET 1 1 A room 14 M21 41V 652 EXPANSION VALVE 15 M21 42A 653 EXPANSION VALVE 1 1 B room 1 1 C room 16 M21 42E 651 EXPANSION VALVE 17 T2W E40 438 CRANKCASE HEATER 1 1 D room 1 1 18 1 1 1 1 1 1 M21 17A 290 BASE ASSEMBLY 19 M21 42E 630 HEAT EXCHANGER 20 M83 410 300 COMPRESSOR MC CHV-253FAA 61 14 OPTIONAL PARTS 14.1. Different-diameter pipe Connects outdoor unit union and gas pipe. Unit : mm (inch) A To outdoor unit connection Length A MAC-451JP [9.52 - [12.7 (3/8) (1/2) 155.5 [12.7 (1/2) [9.52 (3/8) MAC-460JP [9.52 - [9.52 (3/8) (3/8) 155.5 [9.52 (3/8) [9.52 (3/8) B C 87.5 For same diameter pipes Diameter Diameter C B diameter Model name Connected pipes MXZ-18NV To indoor unit connection NOTES: ✼1 As liquid pipe diameter is the same for indoor unit and outdoor unit, L-joint is not required. ✼2 Using MAC-460JP substitutes for pipe bending and makes piping nice-looking. ✼3 Connect it directly to indoor unit gas pipe. Unit : mm (inch) MXZ-32NV For differentdiameter pipes Model name Model code Connected pipes diameter (mm) Length A Length B Length C MAC-454JP 51H-454 {9.52 — {12.7 (3/8) (1/2) {9.52 (3/8) {12.7 (1/2) 69 MAC-455JP 51H-455 {12.7 — {9.52 (1/2) (3/8) {12.7 (1/2) {9.52 (3/8) 65 MAC-456JP 516456 {12.7 — {15.88 (1/2) (5/8) {12.7 (1/2) {15.88 (5/8) 66.5 A B C 14.2. Outlet guide Changes air discharge direction. Model name Model code MXZ-18NV PAC-292SG — MXZ-32NV MAC-855SG 51H-855 610.4 534 386 51.8 760.8 416 PAC-292SG 760.8 832 72 5 - [6 Punxhed hole 29.2 537 386 7 109.4 6.4 13.7 52.5 48 10X48 (=480) 7 4x ø6-holes 7 524 524 7 150 5 - [6 Punxhed hole 6.4 538 29.2 Applied unit 534 MAC-855SG 14.3. Drain socket Applied unit Model name MXZ-18NV PAC-SA46DS27 MXZ-32NV PAC-SB83DS Model code — 7D2-B83 HEAD OFFICE MITSUBISHI DENKI BLDG.MARUNOUCHI TOKYO100 TELEX J24532 CABLE MELCO TOKYO CCopyright 1997 MITSUBISHI ELECTRIC ENGINEERING CO., LTD. Issued in Mar. 1998. MEE No.OB185 REVISED EDITION C 217 Issued in Oct. 1997. MEE No.OB185 REVISED EDITION B CD ROM Issued in Oct. 1997. MEE No.OB185 REVISED EDITION A 337 Issued in Feb. 1997. MEE No.OB185 2222 Printed in Japan New publication,effective Mar. 1998. Specifications subject to change without notice