Air Purging Of The Piping And Indoor Unit - LG LS-E0960CL Service Manual

6. 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 posi-
tion with the Hexagonal wrench for the unit oper-
ation.
Terminal block
(pillar terminal)
2-way valve
(open)
3-way valve
(Close)
Result
• Re-tighten the connecting portion with torque
wrenches.
Leakage ceased
-34-
To indoor unit
Liquid side
Gas side
Cap
Hexagonal wrench
Service port cap
Leakage found
Leakage persists
Repair
Leakage ceased
Cover
control