Troubleshooting by Error Code
SiUS341615E
245
Service Diagnosis
3.46 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 (
∗
1)
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
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
12/14 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 RXYQ-TA Series
Page 1: ...Service Manual SiUS341615E RXYQ72 408TAYDU RXYQ72 408TATJU Heat Pump 60 Hz...
Page 321: ...SiUS341615E Wiring Diagrams Appendix 308 RXYQ96 120TAYDU 2D106439A...
Page 322: ...Wiring Diagrams SiUS341615E 309 Appendix RXYQ144 168TAYDU 2D106440A...
Page 323: ...SiUS341615E Wiring Diagrams Appendix 310 RXYQ72TATJU 3D106435A...
Page 324: ...Wiring Diagrams SiUS341615E 311 Appendix RXYQ96 120TATJU 2D106436A...
Page 325: ...SiUS341615E Wiring Diagrams Appendix 312 RXYQ144 168TATJU 2D106437A...
Page 335: ...SiUS341615E Wiring Diagrams Appendix 322 VAM1200GVJU 3D073270C...
Page 336: ...Revision History Month Year Version Revised contents 02 2017 SiUS341615E First edition...
