Fujitsu AB*14LBAJ Service Instruction page 65

Trouble shooting 17
OUTDOOR UNIT Error Method:
Compressor rotor location cannot detect
(Permanent Stop)
Detective Actuators:
Outdoor Unit Main PCB Circuit
Forecast of Cause :
1. Defective connection of electric components 2. Main PCB failure
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.
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 degrees,
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.
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