Fujitsu ABYG18KRTA, Service Manual

Page: 81 / 196

2-3. E: 12. Wired remote controller communication error (Indoor
unit)
Indicator
Wired remote
controller
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 wired remote controller and indoor unit, and check if
there is a disconnection of the cable.
↓
Check Point 1-2 : Check Wired remote controller
and main PCB
• If it is DC 12 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 CN14 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.
↓
End
Check Point 2 : Wire installation wrong remote controller group setting
• Wrong wire connection in remote controller group (Please refer to the installation manual)
• The number of connecting indoor unit and remote controller in one remote controller group
were less than 32 units.
↓
Check Point 2-1 : Check Indoor unit main PCB
• Check if main PCB damage
• Change main PCB and check the error after setting remote controller address
↓
End
2-3. E: 12. Wired remote controller communication error (Indoor unit)
- (03-7) -
2. Troubleshooting with error code
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