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Electronic Parts Troubleshooting Guide
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.W.B. Ass'y
(Fuse, Noise Filter, SMPS Transformer, Bridge Diode, etc.)
The operation check of the Indoor P.C.B. Ass'y
Procedure
1) The input voltage of SMPS
2) The output voltage of SMPS
4) IC04D(7805)
5) IC01A(KIA7036)
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
-52-
YES
• Primarily, the operating
condition of Micom is O.K.
• Check CN-DISP1
CN-DISP2
Remedy
1) Replace
SMPS
2) Replace
SMPS
4) Replace IC04D.
5) Replace IC01A.
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Table of Contents
Troubleshooting
