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Troubleshooting by Error Code
SiUS331708EA
215
Service Diagnosis
4.42 Inverter Compressor Instantaneous Overcurrent
Error Code
L5
Applicable
Models
All outdoor units
Method of Error
Detection
Error is detected from current flowing in the power transistor.
Error Decision
Conditions
An excessive current flows in the power transistor.
Supposed
Causes
Defective compressor coil (disconnected, defective insulation)
Defective compressor startup (mechanical lock)
Defective PCB
Troubleshooting
Replace the outdoor main
PCB (A1P).
YES
YES
NO
NO
YES
NO
NO
Check if the power
transistor is
normal.
Failure occurs
again after restarting the
unit.
YES
(
(
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Insulation
resistance of
the compressor
is 100 k
Ω
or
below.
Compressor coils are
disconnected.
Continue the operation.
Momentary power failure
is possible.
Replace the inverter
compressor.
Replace the inverter
compressor.
CHECK 4
Replace the outdoor main PCB.
NO
YES
Failure occurs
again after restarting the
unit.
Continue the operation.
Replace the compressor.
CHECK 4
Summary of Contents for RXSQ24TAVJU
Page 1: ...Service Manual SiUS331708EA RXSQ24 36 48 60TAVJU Heat Pump 60 Hz...
Page 290: ...Wiring Diagrams SiUS331708EA 277 Appendix RXSQ48TAVJU 3D109546A...
Page 291: ...SiUS331708EA Wiring Diagrams Appendix 278 RXSQ60TAVJU 3D109547A...
Page 295: ...SiUS331708EA Wiring Diagrams Appendix 282 FXZQ05 07 09 12 15 18TAVJU 3D110443A...
Page 298: ...Wiring Diagrams SiUS331708EA 285 Appendix FXEQ07 09 12 15 18 24PVJU 3D098557A...
Page 300: ...Wiring Diagrams SiUS331708EA 287 Appendix FXSQ05 07 09 12 15 18 24 30 36 48 54TAVJU 3D110467B...
Page 301: ...SiUS331708EA Wiring Diagrams Appendix 288 FXMQ07 09 12 15 18 24 30 36 48 54PBVJU 3D093209B...
Page 302: ...Wiring Diagrams SiUS331708EA 289 Appendix FXHQ12 24 36MVJU 3D048116C...
Page 303: ...SiUS331708EA Wiring Diagrams Appendix 290 FXAQ07 09 12 18 24PVJU 3D075354C...
Page 309: ...SiUS331708EA Wiring Diagrams Appendix 296 VAM1200GVJU 3D073270D...