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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) IC04D(7805)
5) IC01A(KIA7036)
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↑
Troubleshooting Guide
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
Service Manual 69
- Quick Links:
- Lg Model Name
- Schematic Diagram
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