Service Manual

Trouble shooting 2
INDOOR UNIT Error Method:
Wired Remote Controller
Communication Error
Indicate or Display:
Indoor Unit : Operation LED 1 times Flash, Timer LED 2 Times Flash,
Economy LED Continuous Flash.
Outdoor Unit : E.5 U.1
Error Code : 1 2
Detective Actuators:
Indoor unit controller PCB
Wired Remote Controller
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.
Check Point 2 : Check Remote controller and Controller PCB
Check terminal voltage of controller PCB Connector. (Power supply for Remote)
If DC12V, Remote Controller failure (C
ontroller PCB is OK) >>> Replace Remote Controller
If DC0V, Controller PCB failure (Remote is OK) >>> Replace
Controller PCB and execute the check operation again.
-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 controller and Indoor unit,
and check if there is a disconnection or short of the cable.
OK
DC
Forecast of Cause : 1. Terminal connection abnormal 2. Wired Remote Controller failure 3. Controller PCB failure
Cassette / Duct Type CN14 , Wall mount Type CN6 , Small size Wall mount Type CN305(UTY-XCBXZ14)
02-19