YES
NO
Disconnect the outdoor fan motor
connector and try to startup
Check power supply.
NO
Is power supply voltage OK?
YES
YES
NO
Is the insulation resistance and coil
resistance of compressor OK?
Defective compressor→replace.
Try to startup several times.
Is power transistor module OK?
NO
Defective inverter PCB→replace.
YES
YES
Is the inverter output OK?
NO
Defective inverter PCB→replace.
Note: Several times restarting trial may
make a recovery from startup failure,
because liquid refrigerant migrated in the
compressor could be discharged during
several trial.
Can start?
NO
Defective compressor→replace.
Is the pressure balance at starting
OK?
NO
Check refrigerant amount and
refrigerant circuit.
Does compressor startup?
Defective fan motor→replace.
YES
To Next Page
Loading...
Need help?
General
