LG A30033W15 Diagram
- 52 -
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-TAB1, RY-COMP No. 3 PIN
• 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
‹X
• IC01D(7812) Output
(Indoor/Outdoor unit)
‹X
• IC02D(7805) Output
(Indoor/Outdoor unit)
‹X
• 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 10,
(DC +4.5V over) and Soldering condition.
Content Remedy
NO
YES
(After 10 seconds)
- 53 -
2. The product is not operate with the remote controller.
Turn on Main Power
While the compressor has been stopped, the compressor does not
operate owing to the delaying function for 3 minutes after stopped.
Caused by other parts except the remote controller
Cause by the remote controller
When the mark( ) is displayed in LCD screen, replace
battery.
Check the contact of CN-DISPI connector.
When the compressor stopped Indoor Fan is driven by a low speed.
At this point the wind speed is not controlled by the remote controller.
(When operated in the Sleeping Mode, the wind speed is set to the
low speed by force.)
Check DISP PWB Ass'y
- Voltage between CN DISP1 ¤ - ¤ : DC +5V
When the detect switch(double key) inside the remote
controller door is fault, it is impossible to operate
temperature regulating(¡ª/¡ ) and wind speed selecting.
Check the connecting circuit between the remote controller
MICOM (No. § ) - R17(2Ω) - IR LED - Q1 - R16(2.2KΩ).
Check point
• Check the connecting circuit between PIN §łR02L 5100 Ω - Cø1L(680PF) - MICOM PIN No. 43
• Check Receiver Ass'y
Loading...