Fujitsu ASYG09KMCB Service Instruction page 48

Troubleshooting 16
Compressor motor control error
OUTDOOR UNIT Error Method:
Detective actuators:
Outdoor unit Main PCB
Compressor
Forecast of cause :
1. Defective connection of electric components
2. Main PCB failure
3. Compressor failure
Check Point 1 : Check Noise from Compressor
Turn on Power and check operation noise.
If an abnormal noise show, replace Compressor.
OK OK
Check Point 2 : Check connection of around the Compressor components
For Compressor Terminal, Main PCB
Check if connector is removed.
Check erroneous connection.
Check if cable is open.
(Refer to PARTS INFORMATION 2)
>>Upon correcting the removed connector or mis-wiring, reset the power.
OK OK
Check Point 3: Replace main PCB
If Check Point 1,2 do not improve the symptom, change main PCB.
OK OK
Check Point 4: Replace compressor
If Check Point 3 do not improve the symptom, change compressor.
Detective details:
If it does not succeed even if the compressor is started 50 times,
it will become 3 minutes ST.
If it does not succeed even after repeating this 3 sets, the compressor
will stop permanently.
If the three phase current is less than the single phase current,
the compressor will stop permanently.
02-20