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-