LG Single "A" Service Manual page 86

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
Be sure to disconnect the power cable plug from the plug socket before disassembling the
equipment for a repair. Internal components and circuit boards are at main potential when the
equipment is connected to the power cables. This voltage is extremely dangerous and may
cause death or severe injury if come in contact with it.
Be sure to turn off power switch before connect or disconnect connector, or parts damage may
be occurred.
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Only for training and service purposes
No
* Refer to 10.1
* Check the voltage of power
No
No
* When the mark (
in LCD screen, replace battery.
3 - 6 should be DC +5V,
- 85 -
5. Trouble Shooting
) is displayed
LGE Internal Use Only