Indoor Manual Auto Switch Error - Fujitsu AB A30LBT Series Service Instruction

Trouble shooting 20
INDOOR UNIT Error Method:

Indoor manual auto switch error

Detective Actuators:
Indoor Unit Controller PCB Circuit
Forced auto switch
Forecast of Cause:
1. Forced auto switch failure
Check Point 1 : Check the Forced auto switch
Check if Forced auto switch is kept pressed.
Check ON/OFF switching operation by using a meter.
>> If Forced auto switch is detective, replace it.
OK
Check Point 2 : Replace Controller PCB
If Check Point 1 do not improve the symptom, change Controller PCB.
Indicate or Display:
Refer to error code table.
Detective details:
When the Forced auto switch becomes ON for 30 consecutive seconds.
2.Controller PCB failure
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