1) Air purging
The air which contains a moisture is remaining 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 connection portion of
the pipings.
• For the left pipings, refer page 26.
• For more details, refer page 45(2-way 3-way valve).
ƒNCAUTION:
Do not leak the gas in the air during Air purging
with vacumm pump as possible as you can.
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.
ƒU Repeat the operation three times.
ƒU Re-tighten the connecting portion with wrench.
No leakage found
Result
leakage found
leakage ceased
leakage ceased
leakage persists
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Repair
5. Air Purging
ƒ¡38ƒ¡
7. Set the both 2-way and 3-way valves to open position with the hexagonal wrench for the unit operation.
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