Fujitsu ARYG72LHTA Service Instruction page 66

Trouble shooting 29
OUTDOOR UNIT Error Method:
Compressor Control Error
Detective Actuators:
Compressor
Transistor PCB
CT PCB
Forecast of Cause :
1. Defective connection of electric components
4. CT PCB
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: Check Transistor PCB
Check IPM. (PARTS INFORMATION 7)
>> If IPM is abnormal, replace Transistor PCB.
OK OK
Check Point 4: Replace Compressor
If Check Point 4 do not improve the symptom, change Compressor.
Indicate or Display:
Error code : 95
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. Compressor failure
02-30
Outdoor unit :
PUMP LOW
POWER
DOWN NOISE
ERROR
MODE (L1) (L2) (L3) (L4)
5
2 9
3. Transistor PCB failure
PEAK
CUT
(L5) (L6)