Fujitsu ASYG09KMCB Service Instruction page 34

Troubleshooting 2
Remote control communication error
INDOOR UNIT Error Method:
Detective actuators:
Indoor unit controller PCB
Wired remote control
Forecast of cause:
1. Terminal connection abnormal
2. Wired remote control failure
3. Controller PCB failure
Check Point 1 : Check the connection of terminal
After turning off the power, check & correct the followings.
Check the connection of terminal between remote control and Indoor unit,
and check if there is a disconnection of the cable.
OK OK
Check Point 2 : Check remote control and controller PCB
Check Voltage at CNC01 (terminal 1-3) of UTY-XCBXZ2 (Communication kit).
(Power supply to Remote Control)
>> If it is DC13V, Remote Control is failure. (Controller PCB is normal)
>> If it is DC 0V, Controller PCB is failure. (Check Remote Control once again) >> Replace Controller PCB
Upon correcting the removed connector or mis-wiring, reset the power.
Detective details:
When the indoor unit cannot receive the signal from Wired Remote Control
more than 1minute during normal operation.
02-06
>> Replace Remote Control