Outdoor Unit - LG MLP-F8081CL Service Manual

Air Purging of the Piping and Indoor Unit
The air which contains moisture and which remains in
the Refrigeration cycle may cause a malfunction on the
compressor.
Remove the caps from the 4-way(liquid side) and
4-way(gas side) valves.
Remove the service-port cap from the 3-way
(gas side) valve.
To open the valve, turn the valve stem of 3-way
(liquid side) valve counter-clockwise approx. 90°
and hold it there for ten seconds, then close it.
Check a gas-leakage of the connecting portion
of the pipings.
No leakage found
To open 3-way(liquid side) valve
again, turn the valve stem counter-
clockwise until it stops.
To purge the air, push the pin on the service port
of 3-way(gas side) valve for three seconds using
with a hexagonal wrench and set it free for one
minute.
• Repeat this three times.

Outdoor unit

3-way valve cap
(gas side)
3-way valve cap
(liquid side)
Result
• Re-tighten the connecting portion with
leakage ceased
Service port cap
Hexagonal wrench
To indoor unit
leakage found
torque wrenches.
leakage persists
leakage ceased
Service Manual 29
Installation