LG LS-H0560CL Service Manual page 24

8. Checking a gas leakage
(1) Connect the manifold gauge to the service port of 3-way valve.
Measure the pressure.
(2) Keep it for 5-10 minutes.
Ensure if the pressure indicated on the gauge is as same as that of measured at first time.
Indoor unit
CLOSE
NOTE:
The additional gas for air purping has been charged in the outdoor unit.
However, if the flare connections have not been done correctly and there gas leaks, a gas cylinder and the
charge set will be needed.
CAUTION: Do not leak the gas in the air during Air purging, with vacumm pump are possible as you can.
Liquid side
Gas side
CLOSE
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Closed
Closed
Outdoor unit