Fujitsu ARU7RLF Service Instruction page 63

Trouble shooting 24
OUTDOOR UNIT Error Method:
Over Current Error
Detective Actuators:
Outdoor unit Main PCB
Compressor
Forecast of Cause :
1. Outdoor Heat Exchanger clogged
2. Outdoor Fan Operation failure
3. Main PCB
4. Inverter compressor failure (lock, winding short)
Check Point 1 : Check ambient temp. around motor,Heat Exchanger
Check excessively high temperature around the motor.
(If there is any surrounding equipment that causes heat)
Is there anything obstructing the air distribution circuit?
Is there any clogging of Outdoor Heat Exchanger?
>>Upon the temperature coming down, restart operation.
OK
Check Point 2 : Check Outdoor Fan
Is the Fan rotating by hand when operation is off ?
>> If the Fan Motor is locked, replace it.
OK
Check Point 3: Replace Main PCB
If Check Point 1,2 do not improve the symptom, change Main PCB.
OK
Check Point 4: Replace Compressor
If Check Point 3 do not improve the symptom, change Compressor.
Indicate or Display:
Refer to error code table.
Detective details:
"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.
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