LG MLP-F8081CL Service Manual page 42

3-Way Valve
Evacuation
(All amount of refrigerant leaked)
Vacuum pump
• Procedure
Connect the vacuum pump to the center hose of charge set.
Evacuation for approximately one hour.
- Confirm that the gauge needle has moved toward -76cmHg (vacuum of 4 mmHg or less).
Close the valve (Lo side) on the charge set, turn off the vacuum pump, and confirm that the gauge needle
does not move (approximately 5 minutes after turning off the vacuum pump).
Disconnect the charge hose from the vacuum pump.
- Vacuum pump oil.
If the vacuum pump oil gets dirty or depleted, replenish as needed.
42 Floor Standing Type Air Conditioner
Indoor unit
Lo
OPEN
CLOSE
Liquid side
3-Way
valve
Gas side
3-Way
valve
Outdoor unit
Open
Open