LG LSU120HE - Manual (Page 47)

Service Manual 47
Troubleshooting Guide
Balance Refrigerant of the 3-way Valve
(Gas leakage)
• Procedure
(1) Confirm that both the 2-way and 3-way
valves are set to the back seat.
(2) Connect the charge set to the 3-way
valve’s port.
– Leave the valve on the charge set closed.
– Connect the charge hose to the service
port.
(3) Open the valve (Lo side) on the charge set
and discharge the refrigerant until the
gauge indicates 0 kg/cm
2 G.
– If there is no air in the refrigerant cycle (the
pressure when the air conditioner is not
running is higher than 1 kg/cm
2 G), dis-
charge the refrigerant until the gauge indi-
cates 0.5 to 1 kg/cm
2 G. if this is the case, it
will not be necessary to apply a evacuatin.
– Discharge the refrigerant gradually; if it is
discharged too suddenly, the refrigeration
oil will also be discharged.
Lo
Open
Open
3-Way
valve
3-Way
valve
Gas side
CLOSE OPEN
Outdoor unit
Liquid side
Indoor unit