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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 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 CNC01 (terminal 1—

3) of UTY-TWBXF (Communication

kit). (Power supply to the remote con-

troller)

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

Fujitsu RSG09KMCDN User Manual

Questions and Answers: