Trouble shooting 1 E12.1
INDOOR UNIT Error Method:
Wired Remote Controller
Communication Error
Indicate or Display:
Indoor Unit : Operation LED 1 times Flash, Timer LED 2 Times Flash,
Filter LED Continuous Flash. < 1 2 >
Outdoor Unit : E.5 U.1
Error Code : 1 2
Detective Actuators:
Indoor unit controller PCB circuit
Wired Remote Control (3 wire / 2 Wire type)
Detective details:
Upon receiving the signal more than 1 time from Wired Remote or other Indoor
unit, but the same signal has not been received more than 1 minute (3 Wire
type). 2.5 minute (2 Wire type)
Check Point 2 : Check Remote and Controller PCB
Check terminal voltage of controller PCB Connector CNC01. (Power supply for Remote)
If DC12V, Remote Control failure (C
ontroller PCB is OK) >>> Replace Remote controller
If DC0V, Controller PCB failure (Remote is OK) >>> Replace Controller PCB
-In case of re-installation is done due to removed connector or incorrect
wiring, turn on the power again.
Check Point 1 : Check the connection of terminal
After turning off the power, check & correct the followings.
Indoor Unit - Check the connection of terminal between remote control and Indoor unit, or between Indoor units, and
check if there is a disconnection or short of the cable.
OK
DC
Forecast of Cause : 1. Terminal connection abnormal 2. Wired Remote Control failure 3. Controller PCB failure
04-10
4-2-9 TROUBLE SHOOTING WITH ERROR CODE
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