Fujitsu AS* A09LEC Service Instruction page 36

Trouble shooting 9
INDOOR UNIT Error Method:
Manual Auto Switch Error
Detective Actuators:
Indoor unit Controller PCB
Indicator PCB
Manual Auto Switch
Forecast of Cause :
1. Manual Auto Switch failure
Check Point 1 : Check the Manual Auto Switch
Check if Manual Auto Switch is kept pressed.
Check ON/OFF switching operation by using a meter.
>> If Manual Auto Switch is disabled (on/off switching), replace it.
OK OK
Check Point 2 : Replace Inverter PCB
If Check Point 1 do not improve the symptom, replace
and execute the check operation again.
Indicate or Display:
Refer to error code table.
Detective details:
When the Manual Auto Switch becomes ON for consecutive 10 or
more seconds.
2. Controller PCB and Indicator PCB failure
Controller PCB and Indicator PCB
02-11