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Troubleshooting Guide
Electronic Parts
Refer to electronic contorol device drawing & schematic diagram.
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)
56 Room Air Conditioner
The Product doesn't operate at all.
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
1) AC230V ± 30V
: Check the rated voltage
2) 12V ± 3V
4) DC5V
5) The voltage of micom pin 19
: DC4.5V
Specification
YES
• Primarily, the operating condi-
tion of Micom is O.K.
• Check CN-DISP1
CN-DISP2 of indoor 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
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