LG GB7143**AV Series Service Manual page 26

4) Charging Tube Connection Step
Required equipment: Charging tube, simple welding machine
Remove a charging pipe to recharge R600a refrigerant after completing work, and then connect a charging tube with
welding
5) Vacuum Air Removal
Required equipment: Vacuum pump
Connect a vacuum pump to a charging tube to perform vacuum cycle.
Vacuum work should be performed for an hour. (If vacuum time is short, normal cooling performance may not be exerted
due to failure of cooling cycle.)
Charging Tube
Suction Pipe
Discharge Pipe
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