Fujitsu AS* A09LEC Service Instruction page 39

Trouble shooting 12
OUTDOOR UNIT Error Method:
Over Current Protection
Detective Actuators:
Outdoor unit Main PCB
Compressor
Forecast of Cause :
1. Connection failure
4. Compressor failure
Check Point 1 : Check connections condition in control unit
Check if the terminal connection is loose.
Check if connector is removed.
Check if connector is erroneous connection.
Check if cable is open.
>> Upon correcting the removed connector or mis-wiring, reset the power.
OK
Check Point 2 : Check Outdoor heat exchanger
Is there any obstructing the air flow route?
Is there any clogging of outdoor unit heat exchanger?
>> If clogged, clear the clog.
OK
Check Point 3 : Check Outdoor fan
Check Outdoor fan motor. (Refer to Trouble shooting 15)
>> If the Fan motor is failure, replace it.
OK
Check Point 4 : Replace Main PCB
If Check Point 1 ~ 3 do not improve the symptom, replace Main
OK OK
Check Point 5 : Replace Compressor
If Check Point 4 do not improve the symptom, replace Compressor.
Indicate or Display:
Refer to error code table.
Detective details:
When over current flows in
After the compressor restarts, if the same error is repeated within
40sec, the compressor stops reappear.
If and
2. Outdoor fan operation failure
5. Main PCB failure
02-14
Inverter PCB
repeats 5 times, the compressor stops permanently.
3. Outdoor heat exchanger clogged
PCB
.
, the compressor stops.