Fujitsu ASU 9RLF1 Service Instruction page 30

Trouble shooting 4
INDOOR UNIT Error Method:
INDOOR UNIT
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 Controller PCB
If Check Point 1 do not improve the symptom, change Controller PCB and Indicator PCB.
Indicate or Display:
Refer to error code table.
Detective details:
When the Manual Auto Switch becomes ON for consecutive 60 or
more seconds.
2.Controller PCB and Indicator PCB failure
02-07