Fujitsu AUXG45LRLB Service Instruction page 68

Trouble shooting 28
OUTDOOR UNIT Error Method:
Compressor Control Error
Detective Actuators:
Outdoor unit Main PCB
Compressor
Transistor PCB
Forecast of Cause :
1. Defective connection of electric components
4. Transistor PCB (IPM) 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: Check Transistor PCB (IPM)
Check IPM. (PARTS INFORMATION 7)
>> If IPM is abnormal, replace Transistor PCB.
OK OK
Check Point 4: Replace Main PCB
If Check Point 1,2 or 1 3 do not improve the symptom, change Main PCB.
OK OK
Check Point 5: 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. Main PCB failure
02-30
Outdoor unit : Model 45.54
PUMP LOW
POWER
DOWN NOISE
ERROR
L ( ) 1 L ( ) 2 (L3) (L4)
MODE
9 5
2
3. Compressor failure
PEAK
CUT
(L5) L ( ) 6