Fujitsu AOYG09KHCAN, Service Manual

Page: 42 / 128

2-3. E: 12. Wired remote controller communication error (Indoor
unit)
Indicator Indoor unit
Operation indicator 1 time flash
Timer indicator 2 time flash
Economy indicator Continuous flash
Error code E: 12
Detective actuator
Indoor unit Main PCB When the indoor unit cannot receive the signal from
Wired remote controller more than 1 minute during
normal operation.
Wired remote control
Forecast of cause
Terminal connection abnormal
Wired remote control failure
Main 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 controller and indoor unit, and check
if there is a disconnection of the cable.
↓
Check point 2. Check connection
• If it is DC 5 V, remote controller is failure.
(Main PCB is normal)
– Replace Remote Control
• If it is DC 0 V, main PCB is failure. (Check
remote controller once again)
– Replace main PCB
Check voltage at CN2 (terminal 1—3)
of UTY-TWBXF (Communication kit)..
(Power supply to the remote controller)
Upon correcting the removed connec-
tor or mis-wiring, reset the power.
↓
End
2-3. E: 12. Wired remote controller communication error (Indoor unit)
- (03-6) -
2. Troubleshooting with error code
TROUBLESHOOTING TROUBLESHOOTING