Troubleshooting by Error Code
SiUS371901E
325
Service Diagnosis
3.53 Compressor Instantaneous Overcurrent
Error Code
L5
Applicable
Models
All outdoor unit models
Method of Error
Detection
Detect current flowing through the power transistor.
Error Decision
Conditions
When overcurrent flows instantaneously through the power transistor.
Supposed
Causes
Defective compressor coil (such as wiring disconnection or insulation failure)
Compressor startup failure (mechanical lock)
Defective inverter PCB
Troubleshooting
Power OFF
Open the stop valve.
YES
NO
Is the stop valve open?
YES
YES
Are
wiring and wire
connections to the relevant
compressor
normal?
Rectify the wiring and
wire connections.
NO
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Are the
leads of the relevant
compressor
normal?
Replace the leads of the
relevant compressor.
NO
A
Check the compressor cable
for disconnection and flaws.
NO
The
insulation
resistance of the relevant
compressor is 100 k
Ω
or less.
Replace the
compressor.
YES
The
internal wiring of
the compressor coil is
defective.
Replace the
compressor.
YES
NO
Go to the next page.
Summary of Contents for REYQ-XA
Page 1: ...Service Manual SiUS371901E REYQ72 456XATJU REYQ72 456XAYDU REYQ72 432XAYCU Heat Recovery 60 Hz...
Page 415: ...SiUS371901E Wiring Diagrams Appendix 402 REYQ144 168XATJU 2D119206A...
Page 416: ...Wiring Diagrams SiUS371901E 403 Appendix REYQ72 96 120XAYDU 2D119207B...
Page 417: ...SiUS371901E Wiring Diagrams Appendix 404 REYQ144 168XAYDU 2D119208B...
Page 418: ...Wiring Diagrams SiUS371901E 405 Appendix REYQ72 96 120 144 168XAYCU 2D119209A...
Page 421: ...SiUS371901E Wiring Diagrams Appendix 408 FXZQ05 07 09 12 15 18TAVJU 3D110443A...
Page 423: ...SiUS371901E Wiring Diagrams Appendix 410 FXEQ07 09 12 15 18 24PVJU 3D098557A...
Page 425: ...SiUS371901E Wiring Diagrams Appendix 412 FXSQ05 07 09 12 15 18 24 30 36 48 54TAVJU C 3D110467C...
Page 426: ...Wiring Diagrams SiUS371901E 413 Appendix FXMQ07 09 12 15 18 24 30 36 48 54PBVJU 3D093209B...
Page 428: ...Wiring Diagrams SiUS371901E 415 Appendix FXHQ12 24 36MVJU 3D048116C...
Page 429: ...SiUS371901E Wiring Diagrams Appendix 416 FXAQ07 09 12 18 24PVJU C 3D075354D...
Page 435: ...SiUS371901E Wiring Diagrams Appendix 422 VAM1200GVJU 3D073270D...
Page 437: ...SiUS371901E Wiring Diagrams Appendix 424 1 4 2 Multi Branch Selector Unit BS4Q54TVJ 3D089123B...
Page 438: ...Wiring Diagrams SiUS371901E 425 Appendix BS6 8Q54TVJ 2D089122B...
Page 439: ...SiUS371901E Wiring Diagrams Appendix 426 BS10 12Q54TVJ 2D089121B...
Page 440: ...Revision History Month Year Version Revised contents 04 2019 SiUS371901E First edition...
