Gree A Series Service Manual page 121

A Series Modular-type Air-cooled (Heat Pump) Chiller
6. Reconnect
the suction
line, the
discharge
line, other
pipes and
electric lines.
Then, check
for normal
operation of
the
compressor.
7. Put back
the front
panels.
Note: there would be trapped oil inside the compressor during replacement, which would not
affect its reliability but increase resistance to the rotors and then consume more power. In
order to expel it, it would be better to install another valve at the lower point of the suction line.
After that, run the compressor for ten minutes and then open this valve until no oil comes out.
Repeat this operation twice for normal oil level.
。Note: be sure power supply has been cut off and refrigerant has been reclaimed before
replacement.
Steps
Replacement of the 4–way Valve
Image
116
(1)Reconnect and
resolder the suction
and discharge lines.
Do charge nitrogen
during soldering;
(2)After soldering,
charge high-pressure
nitrogen for the leak
test.
(3)Power on the unit and
start it through a AC
contact for 2~3
seconds;
(4)When the compressor
runs reversely, it would
generate harsh noise.
Put back front panels and
tighten screws.
Instructions