Outdoor unit
To indoor unit
Hexagonal wrench
Service port cap
3-way valve cap
(gas side)
3-way valve cap
(liquid side)
No leakage found leakage found
leakage ceased
leakage ceased
leakage persists
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.
• Re-tighten the connecting portion with
torque wrenches.
locate a repair leak
Result
5
6
6.7
Air Purging of the Piping and
Indoor Unit
1) Air purging
The air which contains moisture and remains in the
Refrigeration cycle may cause a malfunction on the
compressor.
¤ Remove the caps from the 3-way(liquid side) and
3-way(gas side) valves.
¤Ł Remove the service-port cap from the 3-way
(gas side) valve.
¤ØTo 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.
¤ŒCheck the gas-leakage of the connecting port of
the pipings.
– 33 –
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