Fujitsu AUG12LVLB Service Instruction page 53

Trouble shooting 18
OUTDOOR UNIT Error Method:
Compressor rotor position
detection error (permanent stop)
Detective Actuators:
Outdoor unit Main PCB
Compressor
Forecast of Cause :
1. Defective connection of electric components
Check Point 1 : 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 2: Replace Main PCB
If Check Point 1 do not improve the symptom, change Main PCB.
OK OK
Check Point 3: Replace Compressor
If Check Point 2 do not improve the symptom, change Compressor.
AMP Air Conditioning
Indicate or Display:
Refer to error code table.
Detective details:
While running the compressor, if the detected rotor location is out of
phase with actual rotor location more than 90°,
the compressor stops.
After the compressor restarts, if the same operation is repeated
within 40sec, the compressor stops again.
If and repeats 5 times, the compressor stops permanently.
2. Main PCB failure
02-20
3. Compressor failure
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