LG GR-K192AF Service Manual - Page 39

Major repair method for freezing cycle Item 4. Vacuuming 5. Refrigerant charging Caution Evaporator Compressor 3 Condenser Drier High pressure 3-Way side Valve Hot Line Pipe 2 1 Low pressure Blue Yellow Red High pressure Vacuum pump Connecting the pipe Connect the red hose to the high pressure side and the blue hose to the low pressure side. Vacuuming order Open valve 1 and 2 to vacuum for 40 minutes and then close valve 1. Key Point - When vacuuming, connect the power to increase the vacuum effect. - When sucking the refrigerant operate the compressor. (Inserting refrigerant is easier and surer.) Working order 1) After completing the vacuuming, check the refrigerant amount for each model. 2) Using the vacuum pump, make the bombe vacuum. 3) Measure the refrigerant charging amount - Using an electric weight, measure the weight of the vacuum bombe. - After charging the refrigerant in the bombe, calculate and measure the weight. Indicates the weight of empty bombe Key Point - Room temperature must be around 25°C during the operation. - Control the refrigerant charging amount as follow; -5g in winter and +5g in summer. Calculation of refrigerant charging amount Refrigerant amount=Weight after charging Weight before charging (Bombe weight) - 39 -