Fujitsu ARU9RLF Service Instruction page 35

Trouble shooting 7
INDOOR UNIT Error Method:
Indoor unit fan motor error
Detective Actuators:
Indoor unit Controller PCB
Indoor unit Fan motor
Forecast of Cause:
1. Fan rotation failure
4. Control PCB failure 5. Indoor unit fan motor failure
Check Point 1 : Check rotation of Fan
Rotate the fan by hand when operation is off.
(Check if fan is caught, dropped off or locked motor)
>>If Fan 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 Indoor unit fan motor
Check Indoor unit fan motor. (PARTS INFORMATION 4)
>>If Indoor unit fan motor is abnormal, replace Indoor unit fan motor.
OK
Check Point 4 : Replace Controller PCB
If Check Point 1- 3 do not improve the symptom, replace Controller PCB.
Indicate or Display:
Refer to error code table.
Detective details:
When the condition that actual frequency of Indoor Fan is
below 1/3 of target frequency is continued more than 56 seconds.
2. Fan motor winding open
02-10
3. Motor protection by surrounding temperature rise