02-43
Trouble shooting 40
INDOOR UNIT
INDOOR UNIT Error Method:
Indicate or Display:
Detective Actuators:
Detective details:
Forecast of Cause :
Damper error
Indoor unit Controller PCB Circuit
Limit switch
When close detecting sw and open detecting sw operates simultaneously.
1. Limit switch failure 2. Shorted connector/ wire 3. Controller PCB failure
Refer to error code table.
Check Point 2 :
Check Point 2 : Check Connector (CN18) / Wire
Check Point 1 : Check Limit switch
Check Point 3 : Replace Controller PCB
OK
OK
Check operation of limit switch. (any blocking by dust, etc.)
Remove Limit switch and check ON/OFF switching operation by using a meter.
>>If Limit switch is detective, replace it.
Check loose contact of CN18 /shorted wire (pinched wire).
>>Replace Limit switch if the wire is abnormal
OK
OK
If Check Point 1 & 2 do not improve the symptom, change Controller PCB.
