Service Manual 39
Electronic Parts Troubleshooting Guide
Electronic Parts Troubleshooting Guide
(* Refer to Electronic Control Device drawing and Schematic diagram.)
Turn off Main Power
Turn on Main Power
Does "beeping" sound is made from the Indoor Unit?
Primarily, the operating condition of Micom is OK.
Check the voltage of power(About AC 220V/AC240V, 50Hz)
• Main power's voltage
• Voltage applied to the unit
• Connecting method of Indoor/Outdoor connecting
cable
• Check Fuse (Outdoor PCB Ass'y)
• Check Varistor
ZNRØ1J(Outdoor PCB Ass'y)
Check the connection housing for contacting
• Connector related to CN-POWER
• Display PWB Ass'y Check
Check each load(Indoor/Outdoor Fan Motor,
Compressor, Stepping Motor etc.) and contacting
condition of related connector
PCB Board Operation Check
Items
• Power Transformer
(Outdoor unit)
- Input Voltage
- Output Voltage
• IC01D(7812) Output
(Indoor/Outdoor unit)
• IC02D(7805) Output
(Indoor/Outdoor unit)
• IC01A(KIA7036, Reset IC)
X01(8MHz)
• Replace Trans
• Replace IC01D
• Replace IC02D
• Replace faulty parts
- About AC220V/240V±10% - Check the power voltage
- About AC14±3V
• DC +12V
• DC +5V
• Voltage of Micom No. 2,
(DC +4.5V over) and Soldering condition.
Content
Remedy
NO
YES
(After 10 seconds)
1. The Outdoor Unit does not operate at all
Summary of Contents for L2-C242GL0
Page 13: ...Service Manual 13 Dimensions 900 1 225 370 L3 C482LL0 ...
Page 19: ...Service Manual 19 Electronic Control Device Display P C B ASM ...
Page 21: ...Service Manual 21 Schematic Diagram L2 C362LL0 ...
Page 22: ...22 Multi Air Conditioner Schematic Diagram Outdoor Unit L3 C362LL0 ...
Page 23: ...Service Manual 23 Schematic Diagram L3 C482LL0 ...
Page 75: ...P No 3828A20156P January 2005 Printed in Korea ...