LG LS-B0760CM/B0760HM Service Manual page 36

5. Air Purging
1) Air purging
The air remaining which contains moisture in the
refrigeration cycle may cause a malfunction on the
compressor.
1. Remove the caps from the 2-way and 3-way
valves.
2. Remove the service-port cap from the 3-way
valve.
3. To open the valve, turn the valve stem of 2-way
valve counter-clockwise approx. 90°and hold it
there for five seconds, then close it.
4. Check a gas-leakage of the connecting portion
of the pipings.
CAUTION: Do not leak the gas in the air during
air purging, with vacuum pump as
possible as you can.
No leakage found
5. To open 2-way valve again, turn the
valve stem counter-clockwise until it
stops.
6. To purge the air, push the pin on the service port
of 3-way valve for three seconds with a hexagonal
wrench and set it free for one minute.
7. Set both liquid and gas side valves to open
position with the Hexagonal wrench for the
unit operation.
Terminal block
(pillar terminal)
2-way valve
(Open)
3-way valve
(Close)
Result
• Re-tighten the connecting portion with torque
wrenches.
Leakage ceased
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Cover control
Liquid side
Gas side
Cap
Hexagonal wrench
Service port cap
Leakage found
Leakage persists
Repair
Leakage ceased