Fujitsu AS*G09KXCA Series Service Instruction page 46

Trouble shooting 9
INDOOR UNIT Error Method:
Indoor Fan Motor Lock Error
Indoor Fan Motor Rev. Error
Detective Actuators:
Indoor unit Controller PCB
Indoor Fan motor
Forecast of Cause:
1. Fan motor failure
3. Controller PCB failure
Test 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
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. ( SERVICE PARTS INFORMATION 4 )
OK
Test 4 : Replace Controller PCB
If Test 1, 2 do not improve the symptom, replace Controller PCB.
Indicate or Display:
Indoor Unit :
Operation indicator: 5 time Flash
Timer indicator
Economy indicator: Continuous Flash
Error code : [ E : 51 ]
Detective details:
・When the condition that actual rev. of Indoor Fan is 1/3 or less.
Or the condition of fan speed is 0rpm is continued more than 56 seconds.
・ When it detected 10 seconds continuously at the target rotation
(200rpm) or more.
2. Motor protection by surrounding temperature rise
: 1 time Flash
02-13