LG Multi-Inverter Service Manual page 56

6.2 The Product doesn't operate with the remote controller
Turn on the main power
A "Beeping" sound is made
from the indoor unit
Yes
Is it possible to turn on the unit
by ON/OFF button on display?
Yes
Is the remote controller
working properly?
Yes
* Check the contact point of CN-DISP 1, 2 connector & Re connector.
* Check display P.C.B Assembly
- Voltage between CN-DISP1
- If problem still persists, Replace display PCB
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Only for training and service purposes
No
* Refer to 10.1
* Check the voltage of power
No
(AC220V/AC240V, 50Hz).
No
* When the mark (
in LCD screen, replace battery.
3 - 6 should be DC +5V,
- 55 -
4. Trouble Shooting
) is displayed
LGE Internal Use Only