Fujitsu AOG30KATA Series Service Instruction page 59

Trouble shooting 16
INDOOR UNIT Error Method:
Indoor Unit Fan Motor Error
Detective Actuators:
Indoor unit Power Supply PCB
Indoor unit fan motor
Forecast of Cause:
1. Fan rotation failure
4. Power Supply 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 Power Supply PCB
If Check Point 1- 3 do not improve the symptom, replace Power Supply PCB.
Indicate or Display:
Error code : 51
Detective details:
When the fan motor speed is less than 1/3 of the target fan speed
for 56 seconds.
When detect the 0 rpm for 56 seconds after fan motor started.
2. Fan motor winding open
02-17
Outdoor unit :
Mode Error L1 L2
2
: Light OFF
3. Motor protection by surrounding temperature rise
L3 L4 L5 L6
15
5
: Light ON n : n times blinking