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2. Pump Down
Setting Procedure
1) Set the Dip Switch as follow after shutting the power source down.
UU18W
UU36W
UU24W
UU42W
UU30W
UU48W
UU60W
2) Reset the power.
3) Red LED and Green LED of PCB lights during work.
(The indoor unit is operated by force.)
4) If operation is done, Red LED will be turned off.
If operation is not done normally, Red LED will blink.
5) Close the Liquid valve only after green LED turned off (7 minutes from the start of the machine).
Then close the gas valve after Green LED on.
WARNING:
• When the green LED of PCB is on, compressor is going to be off because of low pressure.
• You should return the Dip Switch to operate normally after finishing the operation.
• Improper Pump down will lead to product turn off along with LED (green &red) off with in 20 min-
utes from the initial start.
Pump Down Dip S/W Setting
(Red LED On, Green LED Off)
(Red LED On, Green LED On)
Pump Down Start
(Red LED On, Green LED Off)
Pump Down Complete
(Red LED Off, Green LED On)
(Red LED Off, Green LED On)
Copyright ©2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
6
UU37W
UU43W
UU49W
UU61W
Power on
Comp on
Power off
Liquid Valve Closed
Gas Valve Closed
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4. Trouble Shooting
LGE Internal Use Only
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