Fujitsu AB*G30LRTE series, Service Instruction

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02-20
Trouble shooting 18
OUTDOOR UNIT Error Method:
Indicate or Display:
Over Current Error
Refer to error code table.
Detective Actuators:
Detective details:
Forecast of Cause :
OK OK
Check Point 2: Replace Main PCB
Outdoor unit Main PCB
Compressor
Transistor PCB (IPM)
If Check Point 1 do not improve the symptom, change Main PCB.
OK OK
Check Point 3: Replace Compressor
If Check Point 3 do not improve the symptom, change Compressor.
1. Outdoor unit fan operation defective, foreign matter on hear exchanger,
excessive rise of ambient temperature
2. Main PCB
3. Inverter compressor failure (lock, winding short)
4. Transistor PCB (IPM) failure
" Protection stop by overcurrent generation after inverter compressor start
processing completed'' generated consecutively 10 times.
* The number of generations is reset if the start-up of
the compressor succeeds.
No obstructions in air passages?
Heat exchange fins clogged
Outdoor unit fan motor check
Ambient temperature not raised by the effect of other heat sources?
Discharged air not sucked in?
Check Point 1 : Check the outdoor unit fan operation, heat exchanger, ambient temperature