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Trouble shooting 39
INDOOR UNIT
INDOOR UNIT Error Method:
Indicate or Display:
Detective Actuators:
Detective details:
Forecast of Cause :
Damper error
(Upper & Lower air flow)
(Upper air flow)
Indoor unit Controller PCB Circuit
Limit switch
Damper
When damper opening recovery operation repeats 6 times.
1. Limit switch failure 2. Shorted connector/ wire 3. Damper faulure
4. 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 4 : Replace Controller PCB
OKOK
OKOK
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
Check Point 2 : Check Point 3 : Check Damper
OKOK
>>Replace Damper if the damper is abnormal
If Check Point 1 3 do not improve the symptom, change Controller PCB.
Check the obstruction of damper movement.
Check the damper movement.
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