Fujitsu AO*G09LTCN, Service Instructions Manual

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02-11
Trouble shooting 8
INDOOR UNIT
INDOOR UNIT Error Method:
Detective Actuators: Detective details:
Forecast of Cause :
Intake grille error
Indoor unit Controller PCB
Micro switch When the Micro switch is detected open while running the compressor.
1. Micro switch failure 2. Shorted connector/ wire 3.Controller PCB failure
Indicate or Display:
Refer to error code table.
Check Point 2 : Check Point 2 : Check Connector (CN11) / Wire
Check Point 1 : Check Limit switch
Check Point 3 : Replace Controller PCB
OK OK
Check operation of Micro switch. (any blocking by dust, etc.)
Remove Micro switch and check ON/OFF switching operation by using a meter.
>>If Micro switch is detective, replace it.
Check loose contact of CN11 /shorted wire (pinched wire).
>>Replace Micro switch if the wire is abnormal
OK OK
If Check Point 1 & 2 do not improve the symptom, change Controller PCB.