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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, 60Hz)
(About AC 220/240V, 50Hz)
• Main power's voltage
• Voltage applied to the unit
• Connecting method of Indoor/Outdoor connecting
cable
• Check PWB Assembly
- Fuse
- Pattern damage
- Varistor(ZNR01J)
Check the connection housing for contacting
• Connector related to CN-TAB1, RY-COMP NO.3
• Connector related to CN-MOTOR
• Connector contacting of Outdoor Fan/Compressor
• Display PWB Assembly Check
Check each load(Indoor/Outdoor Fan Motor,
Compressor, Stepping Motor) and contacting
condition of related connector
Main PCB Board Operation Check
Items
• SMPS Transformer
(Indoor unit)
- Input Voltage
- Output Voltage(ZD02D)
• IC04D(7805) Output
(Indoor/Outdoor unit)
• IC01A(KIA7036, Reset IC)
X01(8MHz)
• Replace Trans
• Replace IC04D
• Replace faulty parts
- About AC220V/240V±10% - Check the power voltage
- About DC12V
• DC +5V
• Voltage of Micom No. 2,
(DC +4.5V over) and Soldering condition.
Content
Remedy
NO
YES
(After 10 seconds)
Summary of Contents for AS-C076QLA0
Page 50: ... 49 Electronic Control Device 1 MAIN P W B ASSEMBLY AC PART COOLING MODEL HEAT PUMP MODEL ...
Page 51: ... 50 2 MAIN P W B ASSEMBLY DC PART TOP VIEW BOTTOM VIEW ...
Page 53: ...Schematic Diagram 52 Cooling Model ...
Page 54: ...Heat Pump Model 53 ...
Page 65: ...P No 3828A20164C February 2003 Printed in Korea ...