Fujitsu AS*A09LKC Service Instructions Manual page 38

Trouble shooting 14
OUTDOOR UNIT Error Method:
Outdoor Unit Fan Error
Detective Actuators:
Outdoor Unit Inverter PCB
Outdoor Fan Motor
Forecast of Cause:
1. Fan Motor failure
Check Point 1 : Check rotation of Fan
Check if the Fan Motor is lock.
(Can the Fan be rotated by hand when operation is off.)
Check the Fan loosening.
(Lock-nut loosening, defective propeller fan)
>> If Fan Motor or bearing is abnormal, replace it.
OK
Check Point 2 : Check ambient temp. around motor
Check excessively high temperature around the motor.
(If there is any surrounding equipment that causes heat)
>> Upon the temperature coming down, restart operation.
OK
Check Point 3 : Check output voltage of Inverter PCB
Check outdoor unit circuit diagram and the voltage.
Inverter PCB
(Measure at
>>1 pin(Red) - 4 pin(Black) DC250V ~ 400V
>>4 pin(Black) - 5 pin(White) DC15V
FM
1 2 3 4 5 6
1 2 3 4 5 6
CN800
If the voltage is not correct, replace
Indicate or Display:
Refer to error code table.
Detective details:
When outdoor fan rotation speed is less than 100rpm in 20 seconds
after fan motor starts, fan motor stops.
After fan motor restarts, if the same operation within 60sec is repeated
consecutively 3 times, compressor and fan motor stops.
If
permanently.
2. Motor protection by surrounding temperature rise
side connector)
2V
7
7
Inverter PCB
repeats 5 times in a row, compressor and fan motor stops
.
02-16
3. Inverter PCB failure