E: 12. →Ired Remote Controller Communication Error (Indoor Unit) - Fujitsu ARXG45KMLA Service Manual

2-3. E: 12. Wired remote controller communication error (Indoor
unit)
→ired remote
Indicator
controller
Indoor unit
Detective actuator
→ired remote control
Forecast of cause
Check point 1. Check the connection of terminal
After turning off the power, 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.
Check Point 2 : Check →ired remote controller
and main PCB
Check voltage at CN300 of main PCB
(terminal 1—3, terminal 1—2). (Power
supply to the remote controller)
Upon correcting the removed connec-
tor or mis-wiring, reset the power.
2-3. E: 12. →ired remote controller communication error (Indoor unit)
Error code
Main PCB
End
→hen the indoor unit cannot receive the signal from
wired remote controller more than following time during
normal operation.
• 3-wire type: 1 minute
• 2-wire type: 2.5 minutes
Terminal connection abnormal
→ired remote control failure
Main PCB failure
• If it is DC 13 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
- (03-8) -
E: 12
2. Troubleshooting with error code