LG Electronics LSN090CE, LSN120CE, LSN180CE, LSN240CE, LSN090HE, LSN120HE, LSN180HE, LSN240HE, LSU090CE, LSU120CE, LSU180CE, LSU240CE, LSU090HE, LSU120HE, LSU180HE, LSU240HE Air Conditioner User Manual


 
48 Room Air Conditioner
Troubleshooting Guide
Evacuation
(All amount of refrigerant leaked)
Procedure
(1) Connect the vacuum pump to the center
hose of charge set center hose
(2) Evacuation for approximately one hour.
Confirm that the gauge needle has moved
toward -76 cmHg (vacuum of 4 mmHg or
less).
(3) Close the valve (Lo side) on the charge
set, turn off the vacuum pump, and con-
firm that the gauge needle does not move
(approxima-tely 5 minutes after turning off
the vacuum pump).
(4) Disconnect the charge hose from the vac-
uum pump.
Vacuum pump oil.
If the vacuum pump oil becomes dirty or
depleted, replenish as needed.
Lo
Open
Open
Vacuum pump
3-Way
valve
Outdoor unit
Liquid side
Indoor unit
Gas side
3-Way
valve
CLOSE
OPEN
Use vacuum pump equipped with check value
applied to be prevented from flowing backward.