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Electronic Parts Troubleshooting Guide
1. 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 220V/AC240V, 50Hz)
• Main power's voltage
• Voltage applied to the unit
• Connecting method of Indoor/Outdoor connecting cable
• Check PWB Ass'y
- Fuse
- Pattern damage
- Varistor(ZNR01J)
Check the connection housing for contacting
• Connector related to CN-POWER
• Connector related to CN-MOTOR
• Connector contacting of Outdoor Fan/Compressor
• Display PWB Ass'y Check
Check each load(Indoor/Outdoor Fan Motor,
Compressor, Stepping Motor) and contacting
condition of related connector
PCB Board Operation Check
Items
• Power Transformer
(Outdoor unit)
- Input Voltage
- Output Voltage
• IC01D(7812) Output (Outdoor unit)
• IC02D(7805) Output (Outdoor unit)
IC04D(7805) Output (Indoor unit)
• IC01A(KIA7036, Reset IC)
OSC01B(8MHz) (Indoor unit)
• IC01A(KIA7036, Reset IC)
OSC01B(4MHz) (Outdoor unit)
• Replace Trans
• Replace IC01D
(Outdoor unit)
• Replace IC02D
(Outdoor unit)
IC04D(Indoor unit)
• Replace faulty parts
- About AC220V/240V±10% - Check the power voltage
- About AC14±3V
• DC +12V
• DC +5V
• Voltage of Micom No. 2, (Indoor unit)
(DC +4.5V over) and Soldering condition.
No. 5 (Outdoor unit)
Content
Remedy
NO
YES
(After 10 seconds)
Содержание LS300CE
Страница 55: ... 55 Electronic Control Device 1 INDOOR UNIT P W B ASSEMBLY P No 6871A10153 PCB ASSEMBLY MAIN ...
Страница 56: ... 56 TOP VIEW BOTTOM VIEW 2 OUTDOOR UNIT P W B ASSEMBLY ...
Страница 57: ... 57 3 DISPLAY P W B ASM ...
Страница 58: ... 58 Schematic Diagram 1 Indoor Unit ...
Страница 64: ...P No 3828A20390R May 2004 Printed in Korea ...