Daikin 2MXM50M Service Manual page 4

ESIE16-02B |
2.2.2.18. "J9-00" - Gas pipe thermistor abnormality .............................................................................................33
2.2.2.19. "L1-00" - Outdoor main PCB abnormality ..............................................................................................34
2.2.2.20. "L3-00" - Switch box temperature abnormality ......................................................................................34
2.2.2.21. "L4-00" - Inverter radiating fin temperature abnormality ........................................................................35
2.2.2.22. "L5-00" - Inverter instantaneous overcurrent (AC output) ..................................................................... 36
2.2.2.23. "P4-00" - Radiating fin temperature sensor abnormality .......................................................................36
2.2.3. System ......................................................................................................................................................... 38
2.2.3.1. "U0-00" - Refrigerant shortage ................................................................................................................38
2.2.3.2. "U2-00" - Power supply abnormality or instantaneous power failure .......................................................38
2.2.3.3. "U4-00" - Transmission abnormality between indoor unit and outdoor unit .............................................39
2.2.3.4. "U7-00" - Transmission outdoor unit-outdoor unit abnormality ................................................................40
2.2.3.5. "UA-00" - Improper combination of indoor unit and outdoor unit .............................................................40
2.2.3.6. "UF-00" - Wiring and piping mismatch .....................................................................................................41
2.2.4. Others .......................................................................................................................................................... 41
2.3. Symptom based troubleshooting ............................................................................................................ 42
2.3.1. Indoor unit .................................................................................................................................................... 42
2.3.2. Outdoor unit ................................................................................................................................................. 42
2.3.3. System ......................................................................................................................................................... 42
2.3.4. Others .......................................................................................................................................................... 42
2.4. Component checklist ............................................................................................................................... 43
2.4.1. Indoor unit .................................................................................................................................................... 44
2.4.1.1. Fan motor .................................................................................................................................................44
2.4.2. Outdoor unit ................................................................................................................................................. 45
2.4.2.1. 4-way valve ..............................................................................................................................................45
2.4.2.2. Compressor ..............................................................................................................................................47
2.4.2.3. Electronic expansion valve ....................................................................................................................... 49
2.4.2.4. Fan motor .................................................................................................................................................51
2.4.2.5. High pressure sensor ...............................................................................................................................52
2.4.2.6. Main PCB .................................................................................................................................................53
2.4.2.7. Pressure sensor .......................................................................................................................................54
2.4.2.8. Refrigerant thermistors .............................................................................................................................56
2.4.3. System ......................................................................................................................................................... 58
2.4.4. Others .......................................................................................................................................................... 58
2.5. Other capacity range ............................................................................................................................... 59
Part 3. Repair ............................................................................................................................61
3.1. Refrigerant repair procedures ................................................................................................................. 61
3.1.1. Refrigerant piping handling .......................................................................................................................... 61
3.1.2. Recovery procedure ..................................................................................................................................... 61
3.1.2.1. Outdoor unit casing ..................................................................................................................................61
3.1.3. Refrigerant pump down ................................................................................................................................ 63
3.1.3.1. Small outdoor unit .................................................................................................................................... 63
3.1.3.2. Large outdoor unit .................................................................................................................................... 64
3.1.4. Piping repair procedures .............................................................................................................................. 64
3.2. Service tools ........................................................................................................................................... 65
3.3. Unit specific repair procedures ............................................................................................................... 66
3.3.1. Indoor unit .................................................................................................................................................... 67
3.3.2. Outdoor unit ................................................................................................................................................. 68
3.3.2.1. Basic removal ...........................................................................................................................................68
3.3.2.2. Replacing switch box ...............................................................................................................................71
3.3.2.3. Replacing 4-way valve body ....................................................................................................................73
3.3.2.4. Replacing 4-way valve coil ....................................................................................................................... 75
3.3.2.5. Replacing compressor .............................................................................................................................76
3.3.2.6. Replacing DC fan motor assembly ...........................................................................................................79
3.3.2.7. Replacing expansion valve body ..............................................................................................................81
3.3.2.8. Replacing expansion valve motor ............................................................................................................82
3.3.2.9. Replacing main PCB ................................................................................................................................84
3.3.2.10. Replacing propeller fan blade assembly ................................................................................................85
3.3.2.11. Replacing thermistors ............................................................................................................................87
3.3.2.12. Setting test mode for inverter checker ...................................................................................................88
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RA R32 Split & multi split M-Series
4/04/17 | Version 1.1