Fujitsu AR G07LL A Series Service Instruction page 36

Trouble shooting 3
INDOOR UNIT Error Method:
Wired Remote Controller
Communication Error
Detective Actuators:
Indoor unit Controller PCB
Wired Remote Controller (Option)
Forecast of Cause:
1. Connection failure
Check Point 1 : Check the connection of terminal
Check & correct the followings.
Check the connection of terminal between Wired Remote Controller and indoor unit,
and check if there is a disconnection of the cable.
OK OK
Check Point 2 : Check Wired Remote Controller and Controller PCB
Check Voltage at terminal 1-3 of Controller PCB or Communication PCB.
(Power supply to Remote Control)
Cassette, Duct Type : CN14
Wall mount ,Floor Type : CN6
Compact Wall mount Type : CN305(UTY-XCBXZ1)
>> If it is DC12V, Remote Control is failure. (Controller PCB is normal)
>> If it is DC 0V, Controller PCB is failure.
Indicate or Display:
Refer to error code table.
Detective details:
When the indoor unit cannot properly receive the signal from
Wired Remote Controller for 1 minute or more.
2. Wired Remote Controller failure
(Check Remote Control once again) >> Replace Controller PCB
3. Controller PCB failure
02-05
>> Replace Remote Control