Fujitsu AU*G36LRLA Service Instruction page 63

Trouble shooting 16
OUTDOOR UNIT Error Method:
PFC circuit Error
Detective Actuators:
Outdoor unit Main PCB
Outdoor unit PFC PCB
Forecast of Cause :
1. Connector connection failure
Check Point 1 : Check connections of between Main PCB and PFC PCB
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 output voltage of Main PCB
Check voltage of Main PCB.
(Measure at Main PCB side connector)
>>1 pin(Brown) - 2 pin(Red) DC15V
If the voltage is not correct, replace Main PCB.
OK
Check Point 3 : Replace PFC PCB
If Check Point 1, 2 do not improve the symptom, replace PFC PCB.
Indicate or Display:
Refer to error code table.
Detective details:
When communication error between Main PCB and PFC PCB
continues for 10 seconds.
When PFC PCB circuit error continues for 10 seconds.
When PFC PCB output voltage is more than DC760V for 30 seconds.
2. Main PCB failure 3. PFC PCB failure
5%
02-18