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2-3. E: 12. Wired remote controller communication error (Indoor

unit)

Indicator

→ired remote

controller

Error code E: 12

Detective actuator

Indoor unit Main PCB →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

→ired remote control

Forecast of cause

Terminal connection abnormal

→ired 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 2 : Check →ired remote controller

and main PCB

• 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

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.



End

2-3. E: 12. →ired remote controller communication error (Indoor unit) - (03-8) - 2. Troubleshooting with error code

TROUBLESHOOTING

Fujitsu ARXG45KMLA User Manual

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