LG LSC121PMA Service Manual - Page 39

Balance refrigerant of the 2-way, 3-way valves

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2) Balance refrigerant of the 2-way, 3-way valves (Gas leakage) Indoor unit Liquid side 2-Way valve Open Outdoor unit Gas side 3-Way valve Open OPEN Lo CLOSE • 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. (3) Open the valve (Lo side) on the charge set and discharge the refrigerant until the gauge indicates 0 kg/cm2G. - If there is no air in the refrigerant cycle (the pressure when the air conditioner is not running is higher than 1 kg/cm2G), discharge the refrigerant until the gauge indicates 0.5 to 1 kg/cm2G. 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. -39-

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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.
(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), discharge
the refrigerant until the gauge indicates 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
2-Way
valve
Gas side
CLOSE
OPEN
Outdoor unit
Liquid side
Indoor unit
-39-