Fujitsu AOTG30KMTC, Service Manual, Page: 54 / 199

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
outdoor unit
Refer to “Error code table (Outdoor unit: for 34 model
only)” on page 1
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
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 controller and indoor unit, and check
if there is a disconnection of the cable.
↓
Check point 2. Check connection
• If it is DC 12 V, remote controller is failure.
(Controller 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 CN6 (terminal 1—3)
of main PCB. (Power supply to the re-
mote 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)
- (03-16) -
2. Troubleshooting with error code
TROUBLESHOOTING TROUBLESHOOTING