Air Purging Of The Piping And Indoor Unit - LG LS-J0761CLCM Service Manual

5. Air Purging of the Piping and Indoor Unit

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
-33-
Gas side
Liquid side
Hexagonal
wrench
Cap
Leakage found
Leakage persists
Repair
Leakage ceased