–37–
The air which contains moisture remaining in the refrig-
eration cycle may cause a malfunction on the compres-
sor.
1. Remove the caps from the gas side and liquid side
valves.
2. Remove the service-port cap from the gas side valve.
3. Turn the valve stem of liquid side valve counter-clockwise
approx. 90° and hold it there for ten 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 purg-
ing. Use vacuum pump as far as possible.
7. Air Purging of the Pipes and Indoor Unit
Outdoor unit
Cover control
To indoor unit
Liquid side
Gas side
2-way valve or
3-way valve
(open)
3-way valve
(Close)
Cap
Service port cap
Hexagonal
wrench
No leakage found
leakage found
Result
leakage persists
leakage ceased
leakage ceased
5. To open liquid side valve again, turn the valve
stem counter-clockwise until it stops.
6. To purge the air, push the pin on the service port
of gas side valve for three seconds with a
hexagonal wrench and set it free for one minute.
Repeat this three times.
• Re-tighten the connecting portion with torque
wrenches.
Repair
7. Set the both liquid and gas side valves to open position
with the Hexagonal wrench for the unit operation.
NOTE:
The additional gas for air purging has been charged in the outdoor unit.
However, if the flare connections have not been done correctly and there gas leaks, a gas cylinder and
the charge set will be needed.
CAUTION :
Do not leak the gas in the air during air purging.
