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50 Room Air Conditioner
Troubleshooting Guide
Electronic Parts
Product does not operate at all.
(* 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 115V, 60Hz)
• Main power's voltage
• Voltage applied to the unit
• Connecting method of Indoor/Outdoor connecting
cable
• Check PWB Ass'y(Outdoor unit)
- Fuse
- Pattern damage
- Varistor(ZNR01J)
Check the connection housing for contacting
• Connector related to CN-POWER
• Connector related to CN-FAN
• Connector contacting of Outdoor Fan/Compressor
• Display PWB Ass'y Check
• Connector related to CN-DC/DC
Check each load(Indoor/Outdoor Fan Motor,
Compressor, Stepping Motor) and contacting
condition of related connector(including connecting
cable of Indoor/Outdoor Unit)
PCB Board Operation Check
Items
• Power Transformer
(Outdoor unit)
- Input Voltage
- Output Voltage
• IC01D(7812) Output
(Indoor/Outdoor unit)
• IC02D(7805) Output (Indoor unit)
IC03D(7805) Output (Outdoor unit)
• IC01A(KIA7036, Reset IC)
Indoor : 16MHz
Outdoor : 8MHz
• Replace SMPS
Module
• Replace IC01D
• Replace
IC02D(Indoor unit)
IC02D(Outdoor unit)
• Replace faulty parts
- About AC115V±10% - Check the power voltage
- About DC15V±3
• DC +12V
• DC +5V
• Voltage of Outdoor unit Micom No. 18,
Voltage of Indoor unit Micom No. 43 and
soldering condition
Content
Remedy
NO
YES
(After 20 seconds)
Содержание ARTCOOL LA121CNM
Страница 58: ...58 Room Air Conditioner Schematic Diagram Schematic Diagram Electric Control Device Indoor ...
Страница 59: ...Service Manual 59 Schematic Diagram Outdoor 12k ...
Страница 60: ...60 Room Air Conditioner Schematic Diagram Wiring Diagram Indoor Unit Models 12k ...
Страница 61: ...Service Manual 61 Outdoor Unit Models 12k C O Models 12k H P Schematic Diagram ...
Страница 62: ...62 Room Air Conditioner Schematic Diagram Components Location Indoor MAIN P W B ASSEMBLY TOP VIEW BOTTOM VIEW ...
Страница 63: ...Service Manual 63 Outdoor 12k TOP VIEW BOTTOM VIEW Schematic Diagram ...
Страница 71: ...P No MFL31443001 Printed in Korea ...