Mitsubishi Electric MUZ-GE25VA-a1 Page 1 Service Manual Download | Manualshive

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SERVICE MANUAL

CONTENTS

1. TECHNICAL CHANGES ··································· 3
2. PART NAMES AND FUNCTIONS ····················· 4
3. SPECIFICATION ················································ 6
4. NOISE CRITERIA CURVES ·····························11
5. OUTLINES AND DIMENSIONS ······················ 13
6. WIRING DIAGRAM ·········································· 15
7. REFRIGERANT SYSTEM DIAGRAM ············· 27
8. PERFORMANCE CURVES ····························· 31
9. ACTUATOR CONTROL ··································· 63

10. SERVICE FUNCTIONS ···································· 64
11. TROUBLESHOOTING ····································· 65
12. DISASSEMBLY INSTRUCTIONS ···················· 86

SPLIT-TYPE AIR CONDITIONERS

NOTE:

RoHS compliant products have <G> mark on the spec name plate.

HFC

utilized

R410A

OUTDOOR UNIT

Indoor unit service manual
MSZ-GE•VA Series (OBH531)

PARTS CATALOG (OBB532)

MUZ-GE25VA

MUZ-GE25VAD

MUZ-GE33VA

MUZ-GE35VA

MUZ-GE35VA2

MUZ-GE35VAD

MUZ-GE42VA

MUZ-GE42VAD

Models

MUZ-GE25VA

-

A1

MUZ-GE50VA

-

A1

MUZ-GE25VA

-

A2

MUZ-GE50VA2

-

A1

MUZ-GE25VAD

-

A1

MUZ-GE50VAD

-

A1

MUZ-GE33VA

-

A1

MUZ-GE60VA

-

A1

MUZ-GE35VA

-

A1

MUZ-GE60VAD

-

A1

MUZ-GE35VA2

-

A1

MUZ-GE71VA

-

A1

MUZ-GE35VA2

-

A2

MUZ-GE71VAD

-

A1

MUZ-GE35VAD

-

A1

MUZ-GE80VA

-

A1

MUZ-GE42VA

-

A1

MUZ-GE80VA2

-

A1

MUZ-GE42VAD

-

A1

MUZ-GE80VAD

-

A1

No. OBH532

REVISED EDITION-E

Please void OBH532 REVISED EDITION-D.

Revision E:

•

MUZ-GE25VAD-

A1

, MUZ-GE35VAD-

A1

, MUZ-GE42VAD-

A1

,

MUZ-GE50VAD-

A1

, MUZ-GE60VAD-

A1

, MUZ-GE71VAD-

A1

and MUZ-GE80VAD-

A1

have been added.

1
2
3
...
»

Summary of Contents for MUZ-GE25VA-a1

Page 1: ... unit service manual MSZ GE VA Series OBH531 PARTS CATALOG OBB532 MUZ GE25VA MUZ GE25VAD MUZ GE33VA MUZ GE35VA MUZ GE35VA2 MUZ GE35VAD MUZ GE42VA MUZ GE42VAD Models MUZ GE25VA A1 MUZ GE50VA A1 MUZ GE25VA A2 MUZ GE50VA2 A1 MUZ GE25VAD A1 MUZ GE50VAD A1 MUZ GE33VA A1 MUZ GE60VA A1 MUZ GE35VA A1 MUZ GE60VAD A1 MUZ GE35VA2 A1 MUZ GE71VA A1 MUZ GE35VA2 A2 MUZ GE71VAD A1 MUZ GE35VAD A1 MUZ GE80VA A1 MUZ...

Page 2: ...t an explosion or fire when the unit is being used serviced or disposed of Correct refrigerant is specified in the manuals and on the spec labels provided with our products We will not be held responsible for mechanical failure system malfunction unit breakdown or accidents caused by failure to follow the instructions Revision D MUZ GE25VA A2 and MUZ GE35VA2 A2 have been added Revision E MUZ GE25V...

Page 3: ...Maximum heating capacity has been changed MUZ GE35VA2 A1 MUZ GE35VA2 A2 1 Compressor has been changed 2 Back panel has been changed 3 Outdoor heat exchanger has been changed 4 Inverter P C board has been changed MUZ GE25VA A2 MUZ GE25VAD A1 MUZ GE35VA2 A2 MUZ GE35VAD A1 MUZ GE42VA A1 MUZ GE42VAD A1 MUZ GE50VA2 A1 MUZ GE50VAD A1 1 Inverter P C board has been changed MUZ GE60VA A1 MUZ GE60VAD A1 MUZ...

Page 4: ... inlet back and side Piping Air outlet Air inlet back and side Drain hose Drain outlet PART NAMES AND FUNCTIONS 2 MUZ GE25VA MUZ GE25VAD MUZ GE33VA MUZ GE35VA MUZ GE35VA2 MUZ GE35VAD MUZ GE42VA MUZ GE42VAD MUZ GE50VA MUZ GE50VA2 MUZ GE50VAD OBH532E ...

Page 5: ...42VAD MUZ GE50VA MUZ GE50VA2 MUZ GE50VAD MUZ GE60VA MUZ GE60VAD MUZ GE71VA MUZ GE71VAD MUZ GE80VA MUZ GE80VA2 MUZ GE80VAD Drain socket 1 1 1 Drain cap 2 Piping Air outlet Drain outlet Air inlet back and side Drain hose MUZ GE60VA MUZ GE60VAD MUZ GE71VA MUZ GE71VAD MUZ GE80VA MUZ GE80VA2 MUZ GE80VAD OBH532E ...

Page 6: ... 32 NEO22 Fan motor Model RC0J50 DB Current 1 Cooling A 0 24 0 31 Heating 0 27 Dimensions W H D mm 800 550 285 Weight kg 30 Special remarks Dehumidification Cooling L h 0 2 0 6 Air flow 1 Cooling High m3 h Med 1 806 1 956 Low 1 170 1 806 Heating High 2 106 2 130 Med 1 806 1 956 Low 1 452 1 476 Sound level 1 Cooling dB A 46 47 Heating 48 Fan speed Cooling High rpm Med 740 800 Low 490 740 Heating Hi...

Page 7: ... Model L 0 32 NEO22 0 45 NEO22 Fan motor Model RC0J50 DB RC0J50 EA Current 1 Cooling A 0 31 0 35 0 32 Heating 0 27 0 31 Dimensions W H D mm 800 550 285 Weight kg 30 33 36 Special remarks Dehumidification Cooling L h 0 8 0 9 1 4 Air flow 1 Cooling High m3 h Med 1 956 1 872 Low 1 806 1 776 1 086 Heating High 2 130 2 016 Med 1 956 1 776 Low 1 476 1 386 Sound level 1 Cooling dB A 47 50 Heating 48 51 F...

Page 8: ... Model RC0J60 AA Current 1 Cooling A 0 32 Heating 0 32 Dimensions W H D mm 840 850 330 Weight kg 54 Special remarks Dehumidification Cooling L h 1 8 1 6 Air flow 1 Cooling High m3 h Med 2 940 Low 1 740 Heating High Med 2 940 Low 2 142 Sound level 1 Cooling dB A 54 Heating 56 Fan speed Cooling High rpm Med 780 Low 480 Heating High Med 780 Low 580 Fan speed regulator 2 Refrigerant filling capacity R...

Page 9: ...ting 6 37 6 34 8 13 8 17 9 83 9 87 Refrigeration oil Model L 0 35 FV50S 0 4 FV50S Fan motor Model RC0J60 BC Current 1 Cooling A 0 84 0 93 0 83 0 86 Heating 0 93 0 82 Dimensions W H D mm 840 880 330 Weight kg 50 53 Special remarks Dehumidification Cooling L h 1 9 2 2 2 9 2 7 Air flow 1 Cooling High m3 h 3 492 3 426 Med 3 066 3 006 Low 1 692 1 512 Heating High 2 952 2 892 Med 2 952 2 892 Low 2 226 2...

Page 10: ...220 240 VAC IGBT TR821 30 A 600 V Specifications and rated conditions of main electric parts Model Item MUZ GE60VA MUZ GE60VAD MUZ GE71VA MUZ GE71VAD MUZ GE80VA MUZ GE80VA2 MUZ GE80VAD Smoothing capacitor C61 C62 C63 CB1 CB2 CB3 560 μF 450 V Diode module DB61 DB65 Fuse F62 T2 0AL250V T2 0AL250V T2 0AL250V F61 F701 F801 F901 F601 F880 F901 T3 15AL250V Intelligent power module IC932 5A 600 V IPM 20 ...

Page 11: ...REQUENCIES Hz COOLING FUNCTION SPL dB A LINE HEATING 50 NC 10 51 90 80 70 60 50 40 30 20 10 63 125 250 500 1000 2000 4000 8000 NC 60 NC 50 NC 40 NC 30 NC 20 NC 70 OCTAVE BAND SOUND PRESSURE LEVEL 0 dB 20μPa BAND CENTER FREQUENCIES Hz COOLING FUNCTION SPL dB A LINE HEATING 47 48 NC 10 90 80 70 60 50 40 30 20 10 63 125 250 500 1000 2000 4000 8000 NC 60 NC 50 NC 40 NC 30 NC 20 NC 70 OCTAVE BAND SOUND...

Page 12: ... Hz COOLING FUNCTION SPL dB A LINE HEATING 55 NC 10 55 OCTAVE BAND SOUND PRESSURE LEVEL 0 dB 20μPa 90 80 70 60 50 40 30 20 10 63 125 250 500 1000 2000 4000 8000 NC 60 NC 50 NC 40 NC 30 NC 20 NC 70 OCTAVE BAND SOUND PRESSURE LEVEL 0 dB 20μPa BAND CENTER FREQUENCIES Hz COOLING FUNCTION SPL dB A LINE HEATING 54 NC 10 56 40 30 20 10 63 125 25 BAND OCTAVE BAND SOUND 90 80 70 60 50 40 30 20 10 63 125 25...

Page 13: ...Open two sides of left right or rear side Drain hole ø42 OUTLINES AND DIMENSIONS 5 3 0 3 5 155 90 198 40 515 299 66 34 51 330 360 850 430 500 80 121 840 Service panel Gas refrigerant pipe joint Refrigerant pipe flared ø12 7 Liquid refrigerant pipe joint Refrigerant pipe flared ø6 35 170 Open as a rule 500 mm or more if the front and both sides are open 100 mm or more 200 mm or more if there are ob...

Page 14: ...iquid refrigerant pipe joint Refrigerant pipe flared Ø 6 35 MUZ GE60 Ø 9 52 MUZ GE71 80 Gas refrigerant pipe joint Refrigerant pipe flared Ø 15 88 350 mm or more 100 mm or more REQUIRED SPACE 500 mm or more 100 mm or more 500 mm or more MUZ GE60VA MUZ GE60VAD MUZ GE71VA MUZ GE71VAD MUZ GE80VA MUZ GE80VA2 MUZ GE80VAD Unit mm OBH532E ...

Page 15: ...15 MUZ GE25VA A1 MUZ GE35VA WIRING DIAGRAM 6 OBH532E ...

Page 16: ...16 MUZ GE33VA OBH532E ...

Page 17: ...17 MUZ GE25VA A2 MUZ GE35VA2 OBH532E ...

Page 18: ...18 MUZ GE25VAD MUZ GE35VAD OBH532E ...

Page 19: ...19 MUZ GE42VA OBH532E ...

Page 20: ...20 MUZ GE42VAD OBH532E ...

Page 21: ...21 MUZ GE50VA OBH532E ...

Page 22: ...22 MUZ GE50VA2 OBH532E ...

Page 23: ...23 MUZ GE50VAD OBH532E ...

Page 24: ...24 MUZ GE60VA MUZ GE71VA MUZ GE80VA OBH532E ...

Page 25: ...25 MUZ GE80VA2 OBH532E ...

Page 26: ...26 MUZ GE60VAD MUZ GE71VAD MUZ GE80VAD OBH532E ...

Page 27: ...re thermistor RT68 Muffler REFRIGERANT SYSTEM DIAGRAM 7 Outdoor heat exchanger Flared connection Defrost thermistor RT61 Discharge temperature thermistor RT62 Flared connection Stop valve with strainar Stop valve with service port Refrigerant flow in cooling Compressor 4 way valve Refrigerant flow in heating Refrigerant pipe ø9 52 with heat insulator Refrigerant pipe ø6 35 with heat insulator R V ...

Page 28: ...rmistor RT68 Ambient temperature thermistor RT65 Strainer 100 Unit mm Outdoor heat exchanger Flared connection Defrost thermistor RT61 Discharge temperature thermistor RT62 Flared connection Stop valve with strainar Stop valve with service port Capillary tube ø3 6 ø2 4 50 Refrigerant flow in cooling Compressor 4 way valve Refrigerant flow in heating Refrigerant pipe ø12 7 with heat insulator Refri...

Page 29: ...tdoor heat exchanger temperature thermistor RT68 Ambient temperature thermistor RT65 Strainer 100 Unit mm MUZ GE71VA MUZ GE71VAD MUZ GE80VA MUZ GE80VA2 MUZ GE80VAD Max Length A Max Height difference B Indoor unit Outdoor unit MAX REFRIGERANT PIPING LENGTH and MAX HEIGHT DIFFERENCE Refrigerant piping m Piping size O D mm Max Length A Max Height difference B Gas Liquid MUZ GE25VA MUZ GE25VAD MUZ GE3...

Page 30: ...GE50VAD 1 550 0 60 160 260 360 460 Calculation X g 20 g m Refrigerant piping length m 7 Model Outdoor unit precharged Refrigerant piping length one way 7 m 10 m 15 m 20 m 25 m 30 m MUZ GE60VA MUZ GE60VAD 1 550 0 0 100 200 300 400 Calculation X g 20 g m Refrigerant piping length m 10 Model Outdoor unit precharged Refrigerant piping length one way 7 m 10 m 15 m 20 m 25 m 30 m MUZ GE71VA MUZ GE71VAD ...

Page 31: ...d dry bulb thermometers to the outdoor air intake Cover the thermometers to prevent direct rays of the sun 3 Check that the air filter is cleaned 4 Open windows and doors of room 5 Press the EMERGENCY OPERATION switch once twice to start the EMERGENCY COOL HEAT MODE 6 When system stabilizes after more than 15 minutes measure temperature and take an average temperature 7 10 minutes later measure te...

Page 32: ... 3 18 3 16 2 14 2 12 2 10 2 8 1 MUZ GE50VA MUZ GE50VA2 MUZ GE50VAD MUZ GE33VA MUZ GE35VA MUZ GE35VA2 MUZ GE35VAD 27 0 24 9 22 8 20 7 18 7 16 6 14 5 12 4 10 4 8 3 MUZ GE42VA MUZ GE42VAD MUZ GE25VA MUZ GE25VAD Outdoor intake air Wet bulb temperature C 20 15 10 5 0 5 10 15 0 4 0 5 0 6 0 7 0 8 0 9 1 0 1 1 1 2 1 3 Heating capacity at Rated frequency Capacity correction factor 15 20 26 MUZ GE80VA MUZ GE...

Page 33: ...n factors Correction of Heating capacity Capacity correction factors MUZ GE42VA MUZ GE42VAD Correction of Heating input Capacity correction factors The operational frequency of compressor Hz The operational frequency of compressor Hz The operational frequency of compressor Hz The operational frequency of compressor Hz Correction of Cooling capacity Capacity correction factors Correction of Cooling...

Page 34: ...orrection factors MUZ GE60VA MUZ GE60VAD Correction of Heating input Capacity correction factors The operational frequency of compressor Hz The operational frequency of compressor Hz The operational frequency of compressor Hz The operational frequency of compressor Hz 0 50 100 150 0 0 0 5 1 0 1 5 2 0 0 50 100 150 0 0 0 5 1 0 1 5 2 0 0 50 100 150 0 0 0 5 1 0 1 5 2 0 0 50 100 150 0 0 0 5 1 0 1 5 2 0...

Page 35: ...utes test run operation finishes and EMERGENCY OPERATION starts operation frequency of compressor varies 6 To cancel test run operation EMERGENCY OPERATION press EMERGENCY OPERATION switch or any button on remote controller 15 20 25 30 35 0 4 0 5 0 6 0 7 0 8 15 20 25 30 35 50 60 70 Ambient temperature C Ambient humidity MPa Gauge 15 20 25 30 35 50 60 70 Ambient temperature C Ambient humidity MPa G...

Page 36: ...bient humidity 15 20 50 25 60 30 70 35 Outdoor current A MUZ GE42VA MUZ GE42VAD MUZ GE35VA2 MUZ GE35VAD 2 5 2 8 3 1 3 4 3 7 4 0 15 20 25 30 50 60 70 35 2 0 2 5 3 0 3 5 4 0 15 20 25 30 35 0 3 0 4 0 5 0 6 0 7 0 8 MPa Gauge Ambient temperature C Ambient humidity MUZ GE80VA2 MUZ GE80VAD 15 20 50 25 60 30 70 35 0 3 0 4 0 5 0 6 0 7 0 8 MPa Gauge Ambient temperature C Ambient humidity MUZ GE80VA 15 20 50...

Page 37: ...70 35 4 0 5 0 6 0 7 0 8 0 MUZ GE71VA MUZ GE71VAD 15 35 4 0 5 0 6 0 7 0 8 0 9 0 Ambient temperature C Ambient humidity Outdoor current A 20 50 25 60 30 70 Outdoor unit current MUZ GE80VA 20 50 25 60 30 70 15 35 6 0 7 0 8 0 9 0 10 0 11 0 Ambient temperature C Ambient humidity Outdoor current A MUZ GE80VA2 MUZ GE80VAD 50 25 60 30 70 15 20 35 6 0 7 0 8 0 9 0 10 0 11 0 Ambient temperature C Ambient hum...

Page 38: ...UZ GE60VA MUZ GE60VAD Ambient temperature C Outdoor current A 0 5 10 15 20 25 3 0 3 5 4 0 4 5 5 0 5 5 MUZ GE35VA2 MUZ GE35VAD Ambient temperature C Outdoor current A 0 5 10 15 20 25 2 0 2 5 3 0 3 5 4 0 4 5 0 5 10 15 20 25 6 0 6 8 7 6 8 4 9 2 10 0 Ambient temperature C Outdoor current A 0 5 10 15 20 25 6 0 7 2 8 4 9 6 10 8 12 0 MUZ GE80VA2 MUZ GE80VAD Ambient temperature C Outdoor current A 0 5 10 ...

Page 39: ...4 0 78 554 27 24 3 35 2 21 0 66 510 3 23 2 13 0 66 538 3 15 2 08 0 66 554 3 05 2 01 0 66 582 27 26 3 45 1 86 0 54 538 3 35 1 81 0 54 566 3 30 1 78 0 54 582 3 20 1 73 0 54 599 28 18 2 94 2 94 1 00 448 2 81 2 81 1 00 470 2 70 2 70 1 00 493 2 60 2 60 1 00 515 28 20 3 06 2 88 0 94 470 2 94 2 76 0 94 498 2 85 2 68 0 94 510 2 75 2 59 0 94 532 28 22 3 19 2 61 0 82 487 3 08 2 52 0 82 518 3 00 2 46 0 82 53...

Page 40: ...9 0 78 627 2 38 1 85 0 78 650 27 24 2 88 1 90 0 66 616 2 70 1 78 0 66 644 2 55 1 68 0 66 672 27 26 3 03 1 63 0 54 638 2 85 1 54 0 54 666 2 68 1 44 0 54 694 28 18 2 45 2 45 1 00 549 2 25 2 25 1 00 582 2 08 2 08 1 00 605 28 20 2 58 2 42 0 94 571 2 40 2 26 0 94 599 2 23 2 09 0 94 633 28 22 2 73 2 23 0 82 594 2 55 2 09 0 82 627 2 38 1 95 0 82 650 28 24 2 88 2 01 0 70 616 2 70 1 89 0 70 644 2 55 1 79 0...

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Page 42: ... 2 97 2 79 0 94 946 2 74 2 57 0 94 983 27 20 3 40 2 79 0 82 928 3 17 2 60 0 82 974 2 94 2 41 0 82 1028 27 22 3 60 2 52 0 70 965 3 37 2 36 0 70 1019 3 14 2 19 0 70 1056 27 24 3 80 2 20 0 58 1001 3 56 2 07 0 58 1047 3 37 1 95 0 58 1092 27 26 3 99 1 84 0 46 1037 3 76 1 73 0 46 1083 3 53 1 62 0 46 1128 28 18 3 23 3 17 0 98 892 2 97 2 91 0 98 946 2 74 2 68 0 98 983 28 20 3 40 2 92 0 86 928 3 17 2 72 0 ...

Page 43: ... 4 69 2 58 0 55 919 4 52 2 48 0 55 970 4 41 2 43 0 55 1000 4 27 2 35 0 55 1050 27 26 4 83 2 08 0 43 970 4 69 2 02 0 43 1020 4 62 1 99 0 43 1050 4 48 1 93 0 43 1081 28 18 4 11 3 91 0 95 808 3 94 3 74 0 95 848 3 78 3 59 0 95 889 3 64 3 46 0 95 929 28 20 4 29 3 56 0 83 848 4 11 3 41 0 83 899 3 99 3 31 0 83 919 3 85 3 20 0 83 960 28 22 4 46 3 17 0 71 879 4 31 3 06 0 71 934 4 20 2 98 0 71 960 4 03 2 86...

Page 44: ... 33 2 23 0 67 1172 27 24 4 03 2 21 0 55 1111 3 78 2 08 0 55 1162 3 57 1 96 0 55 1212 27 26 4 24 1 82 0 43 1151 3 99 1 72 0 43 1202 3 75 1 61 0 43 1252 28 18 3 43 3 26 0 95 990 3 15 2 99 0 95 1050 2 91 2 76 0 95 1091 28 20 3 61 2 99 0 83 1030 3 36 2 79 0 83 1081 3 12 2 59 0 83 1141 28 22 3 82 2 71 0 71 1071 3 57 2 53 0 71 1131 3 33 2 36 0 71 1172 28 24 4 03 2 37 0 59 1111 3 78 2 23 0 59 1162 3 57 2...

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Page 50: ...4 75 2 76 0 58 1902 27 24 5 75 2 65 0 46 1804 5 40 2 48 0 46 1886 5 10 2 35 0 46 1968 27 26 6 05 2 06 0 34 1870 5 70 1 94 0 34 1952 5 35 1 82 0 34 2034 28 18 4 90 4 21 0 86 1607 4 50 3 87 0 86 1706 4 15 3 57 0 86 1771 28 20 5 15 3 81 0 74 1673 4 80 3 55 0 74 1755 4 45 3 29 0 74 1853 28 22 5 45 3 38 0 62 1738 5 10 3 16 0 62 1837 4 75 2 95 0 62 1902 28 24 5 75 2 88 0 50 1804 5 40 2 70 0 50 1886 5 10...

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Page 54: ... 1971 5 70 3 42 0 60 2042 27 24 6 90 3 31 0 48 1936 6 48 3 11 0 48 2024 6 12 2 94 0 48 2112 27 26 7 26 2 61 0 36 2006 6 84 2 46 0 36 2094 6 42 2 31 0 36 2182 28 18 5 88 5 17 0 88 1725 5 40 4 75 0 88 1830 4 98 4 38 0 88 1901 28 20 6 18 4 70 0 76 1795 5 76 4 38 0 76 1883 5 34 4 06 0 76 1989 28 22 6 54 4 19 0 64 1866 6 12 3 92 0 64 1971 5 70 3 65 0 64 2042 28 24 6 90 3 59 0 52 1936 6 48 3 37 0 52 202...

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Page 56: ... 2386 6 75 4 11 0 61 2471 27 24 8 17 4 00 0 49 2343 7 67 3 76 0 49 2450 7 24 3 55 0 49 2556 27 26 8 59 3 18 0 37 2428 8 09 2 99 0 37 2535 7 60 2 81 0 37 2641 28 18 6 96 6 19 0 89 2087 6 39 5 69 0 89 2215 5 89 5 24 0 89 2300 28 20 7 31 5 63 0 77 2173 6 82 5 25 0 77 2279 6 32 4 87 0 77 2407 28 22 7 74 5 03 0 65 2258 7 24 4 71 0 65 2386 6 75 4 38 0 65 2471 28 24 8 17 4 33 0 53 2343 7 67 4 06 0 53 245...

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Page 58: ...7 60 4 33 0 57 2970 27 24 9 20 4 14 0 45 2816 8 64 3 89 0 45 2944 8 16 3 67 0 45 3072 27 26 9 68 3 19 0 33 2918 9 12 3 01 0 33 3046 8 56 2 82 0 33 3174 28 18 7 84 6 66 0 85 2509 7 20 6 12 0 85 2662 6 64 5 64 0 85 2765 28 20 8 24 6 02 0 73 2611 7 68 5 61 0 73 2739 7 12 5 20 0 73 2893 28 22 8 72 5 32 0 61 2714 8 16 4 98 0 61 2867 7 60 4 64 0 61 2970 28 24 9 20 4 51 0 49 2816 8 64 4 23 0 49 2944 8 16...

Page 59: ... 10 45 4 81 0 46 2239 10 06 4 63 0 46 2362 9 83 4 52 0 46 2435 9 52 4 38 0 46 2558 27 26 10 76 3 66 0 34 2362 10 45 3 55 0 34 2485 10 30 3 50 0 34 2558 9 98 3 39 0 34 2632 28 18 9 17 7 88 0 86 1968 8 78 7 55 0 86 2066 8 42 7 24 0 86 2165 8 11 6 98 0 86 2263 28 20 9 56 7 07 0 74 2066 9 17 6 78 0 74 2189 8 89 6 58 0 74 2239 8 58 6 35 0 74 2337 28 22 9 95 6 17 0 62 2140 9 59 5 95 0 62 2276 9 36 5 80 ...

Page 60: ... 2755 7 41 4 30 0 58 2854 27 24 8 97 4 13 0 46 2706 8 42 3 88 0 46 2829 7 96 3 66 0 46 2952 27 26 9 44 3 21 0 34 2804 8 89 3 02 0 34 2927 8 35 2 84 0 34 3050 28 18 7 64 6 57 0 86 2411 7 02 6 04 0 86 2558 6 47 5 57 0 86 2657 28 20 8 03 5 95 0 74 2509 7 49 5 54 0 74 2632 6 94 5 14 0 74 2780 28 22 8 50 5 27 0 62 2608 7 96 4 93 0 62 2755 7 41 4 59 0 62 2854 28 24 8 97 4 49 0 50 2706 8 42 4 21 0 50 282...

Page 61: ...Q INPUT Q INPUT 15 2 70 801 3 40 1001 4 10 1201 4 81 1355 5 51 1463 6 21 1555 6 86 1602 7 56 1632 21 2 54 847 3 24 1078 3 89 1278 4 59 1417 5 24 1525 5 94 1602 6 59 1648 7 26 1709 26 2 21 924 2 92 1155 3 62 1355 4 27 1494 4 97 1602 5 67 1679 6 32 1725 7 02 1771 MUZ GE50VA CAPACITY 5 8 kW INPUT 1650 W INDOOR DB C OUTDOOR WB C 15 10 5 0 5 10 15 20 Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q IN...

Page 62: ...PUT Q INPUT Q INPUT 15 4 50 1321 5 67 1651 6 84 1981 8 01 2235 9 18 2413 10 35 2565 11 43 2642 12 60 2692 21 4 23 1407 5 40 1778 6 48 2108 7 65 2337 8 73 2515 9 90 2642 10 98 2718 12 11 2819 26 3 69 1524 4 86 1905 6 03 2235 7 11 2464 8 28 2642 9 45 2769 10 53 2845 11 70 2921 MUZ GE80VA2 MUZ GE80VAD CAPACITY 9 0 kW INPUT 2550 W INDOOR DB C OUTDOOR WB C 15 10 5 0 5 10 15 20 Q INPUT Q INPUT Q INPUT Q...

Page 63: ...N SENSOR AND ACTUATOR Sensor Purpose Actuator Compressor LEV Outdoor fan motor R V coil Indoor fan motor Discharge temperature thermistor Protection Indoor coil temperature thermistor Cooling Coil frost prevention Heating High pressure protec tion Defrost thermistor Heating Defrosting Fin temperature thermistor Protection Ambient temperature thermistor Cooling Low ambient tempera ture operation Ou...

Page 64: ... is 20 C or below When the pre heat control turns ON the compressor is energized About 50 W MUZ GE60 71 80 Prolonged low load operation in which the thermostat is OFF for a long time at low outside temperature 0 C or less may cause the following troubles To prevent those troubles activate the pre heat control 1 If moisture gets into the refrigerant cycle and freezes it may interfer the start up of...

Page 65: ...NOT to apply stress on the components 5 When connecting or disconnecting the connectors hold the housing of the connector DO NOT pull the lead wires 3 Troubleshooting procedure 1 Check if the OPERATION INDICATOR lamp on the indoor unit is flashing on and off to indicate an abnormality To make sure check how many times the OPERATION INDICATOR lamp is flashing on and off before starting serv ice wor...

Page 66: ...dgment of indoor outdoor abnormality Before blinking does the upper lamp of OPERATION INDICA TOR lamp stay ON for 3 seconds Stays ON for 3 seconds without beep The outdoor unit is abnormal The indoor unit is abnormal Check the blinking pattern and identify the abnormal point by referring to the indoor unit failure mode table Refer to indoor unit service manual Make sure to check at least two conse...

Page 67: ...unit is abnormal Check the blinking pattern and identify the abnormal point by referring to the outdoor unit failure mode table 11 2 3 Make sure to check at least two consecutive blinking cycles 2 Releasing the failure mode recall function Release the failure mode recall function by the following procedures Turn OFF the power supply and turn it ON again Press RESET button of the remote controller ...

Page 68: ...compressor connector Refer to 11 5 How to check inverter compressor 5 time flash 2 5 seconds OFF Discharge temperature Temperature of discharge temperature thermistor exceeds 116 C compressor stops Compressor can restart if discharge temperature thermistor reads 100 C or less 3 minutes later Check the refrigerant circuit and the refrigerant amount Refer to 11 5 Check of LEV 6 time flash 2 5 second...

Page 69: ...ignal error 5 11 time flash 2 5 seconds OFF Stop valve Closed valve Closed valve is detected by compressor current Check the stop valve 6 14 time flash 2 5 seconds OFF Outdoor unit Other abnormality Outdoor unit is defective Refer to 11 2 2 Flow chart of the detailed outdoor unit failure mode recall function 7 16 time flash 2 5 seconds OFF VAD 4 way valve Pipe temperature The 4 way valve does not ...

Page 70: ...n Temperature of discharge temperature thermistor has been 50 C or less for 20 minutes Refer to 11 5 Check of LEV Check the refrigerant circuit and the refrigerant amount 20 8 time flash 2 5 seconds OFF MUZ GE25 33 35 42 50 PAM protection PAM Pulse Amplitude Modu lation The overcurrent flows into IGBT Insulated Gate Bipolar tran sistor TR821 or the bus bar voltage reaches 320 V or more PAM stops a...

Page 71: ... 87 1 18 Outdoor fan motor Measure the resistance between lead wires using a tester Temperature 10 40 C Color of lead wire Normal Ω MUZ GE25 33 35VA MUZ GE35VA2 MUZ GE25 35VAD MUZ GE42VA MUZ GE42VAD MUZ GE50 60 71 80VA MUZ GE50 80VA2 MUZ GE50 60 71 80VAD RED BLK BLK WHT WHT RED 29 42 11 16 12 17 R V coil 21S4 Measure the resistance using a tester Temperature 10 40 C Normal kΩ 1 19 1 78 Expansion v...

Page 72: ...n the compressor and the intelligent power module IPM IGBT module IC700 power module IPM disconnected activate the inverter and check if the inverter is normal by measuring the balance of voltage between the terminals 1 Output voltage is 50 130 V The voltage may differ according to the tester Operation method Start cooling or heating operation by pressing EMERGENCY OPERATION switch on the indoor u...

Page 73: ...ile heating Heating part Connect the compressor and activate the inverter Then measure the time until the inverter stops due to over current Operation method Start heating or cooling operation by pressing EMERGENCY OPERATION switch on the indoor unit TEST RUN OPERATION Refer to 8 3 Measurement Measure the time from the start of compressor to the stop of compressor due to overcurrent Compressor sta...

Page 74: ... EMERGENCY OPERATION switch once COOL mode Thermistor Symbol Connector Pin No Board Defrost RT61 Between CN641 pin1 and pin2 Inverter P C board Discharge temperature RT62 Between CN641 pin3 and pin4 Fin temperature RT64 Between CN642 pin1 and pin2 Ambient temperature RT65 Between CN643 pin1 and pin2 Outdoor heat exchanger temperature RT68 Between CN644 pin1 and pin3 Replace the thermistor except R...

Page 75: ...ctor CN931 and CN932 Disconnect CN932 from the inverter P C board and turn on the power supply Rotate the outdoor fan motor manually and measure the voltage of CN931 Between 1 and 5 Between 2 and 5 Between 3 and 5 Does the voltage between each terminal become 5 and 0 VDC repeatedly Does the outdoor fan motor rotate smoothly Replace the outdoor fan motor Replace the inverter P C board Yes Yes No Fi...

Page 76: ... Is there voltage 230 VAC between the indoor terminal block S1 and S2 No Yes Replace the indoor electronic control P C board Rectify indoor outdoor connecting wire Yes If light up OK If flash refer to 11 3 Does the upper lamp of OPERATION INDICATOR on the indoor unit light up Does LED on the inverter P C board light up or flash Refer to 11 6 1 No Replace the inverter P C board Is there bus bar vol...

Page 77: ... Replace the inverter P C board Replace the LEV coil Replace the expansion valve Is LEV coil properly fixed to the expansion valve Does the resistance of LEV coil have the characteristics Refer to 11 4 Do you hear the expansion valve click click Do you feel the expansion valve vibrate on touching it Turn ON the power supply Preparation of the remote controller While pressing both OPERATION SELECT ...

Page 78: ...or If the connection is poor make it correct Operate the outdoor unit by starting EMERGENCY OPERATION Check the LED indication on the in verter P C board Does the LED flash 10 times Replace the inverter P C board Check the corresponding parts following LED indication Refer to 11 3 Yes No Yes 10 time flash No L Check of inverter P C board Only MUZ GE50 60 71 80 OBH532E ...

Page 79: ...ce the inverter P C board 2 2 Be careful of the residual voltage of smoothing capacitor Yes 3 Be sure to check this within 3 minutes after turning ON After 3 minutes LED blinks 6 times Even when the inverter P C board is normal LED blinks 6 times after 3 minutes Is the bus bar voltage of the inverter P C board or the outdoor electronic control P C board normal Refer to TEST POINT DIAGRAM AND VOLTA...

Page 80: ...FF the power supply Check once more if the indoor outdoor connecting wire is not miswiring Short circuit outdoor terminal block S2 and S3 1 B 1 Miswiring may damage indoor electronic control P C board during the operation Be sure to confirm the wiring is correct before the opera tion starts Turn ON the power supply Does the LED on the inverter P C board repeat 3 6 second OFF and 0 8 sec ond ON qui...

Page 81: ...he installation condition combination of specific conditions such as antennas or wiring Check the following before asking for service 1 Devices affected by the electromagnetic noise TV sets radios FM AM broadcast shortwave 2 Channel frequency broadcast station affected by the electromagnetic noise 3 Channel frequency broadcast station unaffected by the electromagnetic noise 4 Layout of indoor outd...

Page 82: ...stor RT65 CN641 Discharge temperature thermistor RT62 CN641 Defrost thermistor RT61 CN724 LEV connector DB61 Bus bar voltage 260 300 VDC Front side of unit 230 VAC C62 Smoothing capacitor Output to drive compressor LDU LDV LDW F701 Fuse T3 15AL250V C61 Smoothing capacitor C63 Smoothing capacitor F901 Fuse T3 15AL250V CN721 R V coil 230 VAC JS MUZ GE25 33 35 42 VA 35VA2 Jumper wire for changing def...

Page 83: ... CN641 Discharge temperature thermistor RT62 CN641 Defrost thermistor RT61 CN724 LEV connector DB61 Bus bar voltage 260 300 VDC Front side of unit 230 VAC C62 Smoothing capacitor Output to drive compressor LDU LDV LDW F701 Fuse T3 15AL250V C61 Smoothing capacitor C63 Smoothing capacitor F901 Fuse T3 15AL250V CN721 R V coil 230 VAC JS MUZ GE50VA 50VA2 Jumper wire for changing defrost setting MUZ GE...

Page 84: ...ance k Resistance k Resistance k CN673 Fin temperature thermistor RT64 CN672 Ambient temperature thermistor RT65 CN671 Discharge temperature thermistor RT62 CN671 Defrost thermistor RT61 CN932 Output to drive outdoor fan motor CN671 Outdoor heat exchanger tem perature thermistor RT68 F901 Fuse T3 15AL250V F880 Fuse T3 15AL250V CN724 LEV connector JS Jumper wire for chang ing defrost setting JK Jum...

Page 85: ...re Fin temperature thermistor RT64 Resistance k Resistance k Resistance k CN673 Fin temperature thermistor RT64 CN672 Ambient temperature thermistor RT65 CN671 Discharge temperature thermistor RT62 CN671 Defrost thermistor RT61 CN932 Output to drive outdoor fan motor CN671 Outdoor heat exchanger tem perature thermistor RT68 F901 Fuse T3 15AL250V F880 Fuse T3 15AL250V CN724 LEV connector JS Jumper ...

Page 86: ... or not 2 The terminal with this connector has the locking mechanism Slide the sleeve Pull the terminal while pushing the locking lever Hold the sleeve and pull out the terminal slowly Connector Sleeve Locking lever Back panel Service panel Screws of the top panel Screws of the cabinet Screws of the top panel Screw of the service panel Direction to remove Screws of the cabinet Hooks Terminal with ...

Page 87: ...net and panels Refer to 1 2 Disconnect the following connectors Inverter P C board CN721 R V coil 3 Remove the R V coil 4 Removing the discharge temperature thermistor defrost thermistor outdoor heat exchanger tempera ture thermistor and ambient temperature thermistor 1 Remove the cabinet and panels Refer to 1 2 Disconnect the lead wire to the reactor and the following con nectors Inverter P C boa...

Page 88: ...e the cabinet and panels Refer to 1 2 Remove the inverter assembly Refer to 2 3 Recover gas from the refrigerant circuit NOTE Recover gas from the pipes until the pressure gauge shows 0 MPa 4 Detach the brazed part of the suction and the discharge pipe connected with compressor 5 Remove the nuts of compressor legs 6 Remove the compressor 7 Detach the brazed part of pipes connected with 4 way valve...

Page 89: ...service panel 5 Remove the top panel 6 Remove the valve cover 7 Disconnect the power supply and indoor outdoor connect ing wire 8 Remove the screws of the cabinet 9 Remove the cabinet 10 Remove the screws of the back panel 11 Remove the back panel Photo 1 Photo 2 89 Screws of the cabinet Screws of the back panel Screw of the top panel Screw of the top panel Screws of the back panel Screws of the c...

Page 90: ...erter assembly 6 Remove the screw of the earth wire and screw of the T B support 7 Remove the screw of the PB fixture 8 Remove the relay panel from the PB support 9 Remove the inverter P C board from the inverter assembly Photo 3 Photo 4 Inverter assembly Photo5 3 Removing R V coil 1 Remove the cabinet and panels Refer to 1 2 Disconnect the following connectors Inverter P C board CN721 R V coil 3 ...

Page 91: ...otor 1 Remove the top panel cabinet and service panel Refer to 1 2 Disconnect the following connectors Inverter P C board CN931 and CN932 Fan motor 3 Remove the propeller 4 Remove the screws fixing the fan motor 5 Remove the fan motor 6 Removing the compressor and 4 way valve 1 Remove the top panel cabinet and service panel Refer to 1 2 Remove the back panel Refer to 1 3 Remove the inverter assemb...

Page 92: ...service panel 5 Remove the top panel 6 Remove the valve cover 7 Disconnect the power supply and indoor outdoor connect ing wire 8 Remove the screws of the cabinet 9 Remove the cabinet 10 Remove the screws of the back panel 11 Remove the back panel Photo 1 Photo 2 92 Screws of the cabinet Screws of the top panel Screws of the top panel Screw of the back panel Screws of the cabinet Screws of the cab...

Page 93: ...he compressor connector 4 Remove the screws fixing the relay panel 5 Remove the relay panel 6 Remove the earth wires and the lead wires of the inverter P C board 7 Remove the screw of the PB support 8 Remove the inverter P C board from the relay panel Photo 3 Photo 4 3 Removing R V coil 1 Remove the cabinet and panels Refer to 1 2 Disconnect the following connector Inverter P C board CN602 R V coi...

Page 94: ...or 1 Remove the top panel cabinet and service panel Refer to 1 2 Disconnect the following connectors Inverter P C board CN931 and CN932 Fan motor 3 Remove the propeller 4 Remove the screws fixing the fan motor 5 Remove the fan motor 6 Removing the compressor and 4 way valve 1 Remove the top panel cabinet and service panel Refer to 1 2 Remove the back panel Refer to 1 3 Remove the inverter assembly...

Page 95: ...95 OBH532E ...

Page 96: ...uted in Jul 2011 No OBH532 REVISED EDITION C Distributed in Jul 2010 No OBH532 REVISED EDITION B 5 Distributed in Oct 2009 No OBH532 REVISED EDITION A 5 Distributed in Feb 2009 No OBH532 5 Made in Japan New publication effective Sep 2013 Specifications are subject to change without notice HEAD OFFICE TOKYO BLDG 2 7 3 MARUNOUCHI CHIYODA KU TOKYO 100 8310 JAPAN ...

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