LG LAN091CNP, LAU091CNP, LAN121CNP Service Manual page 58

Troubleshooting Guide
2) Balance refrigerant of the 3-way valve
(Gas leakage)
• Procedure
(1) Confirm that both the liquid side and gas side
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.
58 Room Air Conditioner
Indoor unit
Lo
OPEN
Liquid side
3-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 indi-
cates 0 kg/cm
– If there is no air in the refrigerant cycle (the
pressure when the air conditioner is not running
is higher than 1 kg/cm
erant 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 refrig-
2 G. if this is the case, it will not be neces-