Troubleshooting by Error Code
SiUS371614E
233
Service Diagnosis
3.44 Inverter 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 instantaneously overcurrent flows 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
Compressor inspection
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.
8-14 ton classes are equipped
with 2 compressors.
Check for the compressor 1 or
2 applicable to the error code
L5
while in monitor mode of
the outdoor unit PCB.
Check in Monitor Mode
Check for the leads of the
compressor.
For Compressor 1
Leads on the M1C side
For Compressor 2
Leads on the M2C side
Are the
leads of the relevant
compressor
normal?
Replace the leads of the
relevant compressor.
NO
A
Summary of Contents for REYQ-TA Series
Page 1: ...Service Manual SiUS371614E REYQ72 456TAYDU REYQ72 456TATJU Heat Recovery 60 Hz...
Page 304: ...Wiring Diagrams SiUS371614E 291 Appendix REYQ96 120TAYDU 2D106425A...
Page 305: ...SiUS371614E Wiring Diagrams Appendix 292 REYQ144 168TAYDU 2D106426A...
Page 306: ...Wiring Diagrams SiUS371614E 293 Appendix REYQ72TATJU 3D106421A...
Page 307: ...SiUS371614E Wiring Diagrams Appendix 294 REYQ96 120TATJU 2D106422A...
Page 308: ...Wiring Diagrams SiUS371614E 295 Appendix REYQ144 168TATJU 2D106423A...
Page 318: ...Wiring Diagrams SiUS371614E 305 Appendix VAM1200GVJU 3D073270C...
Page 320: ...Wiring Diagrams SiUS371614E 307 Appendix 1 4 2 Multi Branch Selector Unit BS4Q54TVJ 3D089123B...
Page 321: ...SiUS371614E Wiring Diagrams Appendix 308 BS6 8Q54TVJ 2D089122B...
Page 322: ...Wiring Diagrams SiUS371614E 309 Appendix BS10 12Q54TVJ 2D089121B...
Page 323: ...Revision History Month Year Version Revised contents 02 2017 SiUS371614E First edition...
