LG GB7143**AV Series Service Manual page 27

6) Refrigerant Charging
Required equipment: Bombe, R600a refrigerant (73g)
Firstly remove fire appliances and heating source for performing work when charging scaled refrigerant. (Do not spray
refrigerant indoor.)
Measure the accurate quantity (73g) of refrigerant to charge it into a Bombe.
Make the Bomber as vacuum status to charge refrigerant.
(If there is air or moisture in a Bombe, it may give effect on performance of a cooling cycle.)
Please manage refrigerant quantity as 73g 1. Differently from R134a, R600a gives much effect on cooling performance
depending on change of refrigerant quantity.
Refrigerant quantity = Weight after charging - Weight before charging (weight of vacuumed Bombe)
Connect Bombe with a charging tube to charge refrigerant.
Turn on power of refrigerator to operate a compressor.
Measure Bombe weight after 5 through 10 minutes to check remained refrigerant quantity to complete charging of
refrigerant.
(After charging refrigerant, never perform welding work or work using fire appliances.)
7) Leak Inspection and Cycle Check
Required equipment: Leakage checking machine (foam and leakage inspection machine)
Check for leakage by using form or a leakage inspection machine at the worked part if charging of refrigerant is
completed.
Check for leakage at the low pressure part with the compressor stopped, and check at the high pressure part with the
compressor being operating.
If leakage is detected, proceed to repair according to repair process again starting from "2-1. Returnof Refrigerator
Refrigerant".
(Never perform welding work or work using fire appliances.)
Check that heat remains at a discharge pipe or condenser with the hands if leakage check is completed. If heat remains,
the cooling cycle is normal.
(Take care since a discharge pipe may be hot.)
Charging Tube
Suction Pipe
Discharge Pipe
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