Electronic Parts; Copyright ©2008 Lg Electronics. Inc. All Right Reserved; Only For Training And Service Purposes - LG Single "A" Service Manual

5. Trouble Shooting

6. Electronic Parts

6.1 The Product doesn t operate at all
Turn off the main power and
wait for 10 seconds.
Turn on the main power again.
A "Beeping" sound is made
from the indoor unit
No
Check the voltage of power supply and check
for the following :
* The voltage of main power supply.
* The voltage applied to the unit.
* The connecting method of Indoor/Outdoor connecting cable (each color)
* The P.C.B. Assembly (Fuse, Noise Filter, Power Module, Bridge Diode, etc.)
The operation check of the Indoor P.C.B. Ass'y
Procedure
1) The input voltage of power mod-
ule.
2) The output voltage of power mod-
ule.
Copyright ©2008 LG Electronics. Inc. All right reserved.

Only for training and service purposes

Primarily, the operating condition of
Micom is O.K.
Yes
* Check, Remote controller & Receiver.
* Check Connector of Indoor PCB
Specification
1) AC230V ± 30V
: Check the rated voltage
2) 12V ± 3V
- 84 -
Remedy
1) Check the power outlet.
2) Replace
P.C.B Ass'y
LGE Internal Use Only