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Troubleshooting Guide
Electronic Parts
❇ Refer to electronic contorol device drawing & schematic diagram.
The Product doesn't operate at all.
Trouble 1
Check the voltage of power(AC220V/AC240V, 50Hz).
• The voltage of main power.
• The voltage applied to the unit.
• The connecting method of Indoor/Outdoor connecting cable (each color)
• The P.C.B. Ass'y
(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.
4) IC02D(7805)
5) IC01A(KIA7036)
Copyright ©2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Turn off the main power and wait to 10 seconds
Turn on the main power again.
Does "Beeping" sound is made from the indoor unit?
NO
Specification
1) AC230V ± 30V
: Check the rated voltage
2) 12V ± 3V
4) DC5V
5) The voltage of micom pin 19
: DC4.5V↑
- 68 -
YES
• Primarily, the operating condi-
tion of Micom is O.K.
• Check CN-DISP1
CN-DISP2 of indoor DC PCB
Remedy
1) Check the power outlet.
2) Replace
P.C.B Ass'y
4) Replace P.C.B Ass'y
5) Replace P.C.B Ass'y
LGE Internal Use Only
- Quick Links:
- Self-Diagnosis Function
- Outdoor Unit
Hide quick links:
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