Fujitsu ASU30RLE Service Instruction page 52

Trouble shooting 13
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
Test 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
Test 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
Test 3 : Check Indoor unit fan motor
Check Indoor unit fan motor.
>>if Indoor unit fan motor is abnormal, replace Indoor unit fan motor.
OK
Test 4 : Replace Power Supply PCB
If Test 1- 3 do not improve the symptom, replace Power Supply PCB.
Indicate of Display:
Indoor Unit :
Operation lamp: 5 times Flash,
Timer lamp
ERROR CODE : [E : 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
(SERVICE PARTS INFORMATION 4)
Outdoor unit :
: 1 times Flash
3. Motor protection by surrounding temperature rise
02-16
PUMP LOW
POWER
DOWN NOISE
ERROR
MODE (L1) (L2) (L3) (L4)
5 15
2
: Light OFF : Light ON n : n times blinking
PEAK
CUT
(L5) (L6)