LG LAN181CNW, LAU181CNW, LA180CPI, LA180CPO Service Manual page 50

2-way, 3-way Valve
2) Balance refrigerant of the 2-way, 3-way valves
(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 with the push pin to
the service port.
50 Room Air Conditioner
Indoor unit
Lo
OPEN
Liquid side
2-Way
valve
Gas side
3-Way
valve
CLOSE
(3) Open the valve (Lo side) on the charge set
and discharge the refrigerant until the gauge
indicates 0 kg/cm
– If there is no air in the refrigerant cycle (the
pressure when the air conditioner is not run-
ning is higher than 1 kg/cm
refrigerant until the gauge indicates 0.5 to 1
kg/cm
sary to apply a evacuatin.
– Discharge the refrigerant gradually; if it is dis-
charged too suddenly, the refrigeration oil will
also be discharged.
Outdoor unit
Open
Open
2 G.
2 G), discharge the
2 G. if this is the case, it will not be neces-