Samsung US07A1VE, Service Manual

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Operating Instructions and Installation
3-10
Samsung Electronics
3-2-2(g) Air-Purge Procedure
• Use the refrigerant of the outdoor unit to purge air inside indoor unit and pipe.
not
leaking
1. Remove the caps from the 2-way valve(B)
and the 3-way valve(A).
3 Check refrigerant leakage of each joint parts
(A, B, C & D in right figure)
6. Open the 2-way valve and 3-way valve
completely
4. Open the 2-way valve again.
7. Close the cap of each valve.
8. Check each valve for leakage.
5. Open the service valve cap of the 3-way
valve and press the needle valve to
discharge gas for 3 seconds and leave it
for about 1 minute.
Repeat the above procedure for 3 times
to purge air.
Leaking
If leaking, tighten the flare nut one more time.
If continues to leak, although the pipe fixing
area has been tightened again,
repair the leaking area.
2 Turn the 2-way valve cock approx. 45°
counterclockwise to open it. Close it
about 10 seconds later.
Valve stem
Stopper
Valve stem
Indoor Unit
Outdoor Unit
Liquid pipe side
2-way valve 3-way valve
Gas pipe side