Gree A Series Service Manual page 131

A Series Modular-type Air-cooled (Heat Pump) Chiller
3. Record the
direction of the
4–way valve
before de-
soldering. The
multi-system
unit cannot take
other system as
a example.
4. Vacuum the
system and
recharge
refrigerant.
Note: be sure there is no refrigerant inside the system and power supply has been cut off
before replacement.
Steps
1. Reclaim
refrigerant and
remove the
middle panel.
2. Take out the
coils, pipe
clamps and
rubber pads.
Replacement of the Electrostatic Expansion Valve
Image
(1)Remember installation
direction before replacement;
(2)Remove coils;
(3)Wrap it with wet cloth to keep
its completeness for further
analysis;
(4)Desolder the 4–way valve.
(1)Keep the vacuum degree to
—1.0bar. Vacuuming period
would be longer for the
repaired unit;
(2)Charged refrigerant should be
the same as that stated at the
nameplate.
(1)Cut off power supply of the
unit;
(2)Reclaim refrigerant;
(3)Remove the middle panel.
(1)Take out coils;
(2)Loosen screws and take out
pipe clamps and rubber pads;
(3)Wrap the valve with wet cloth
to prevent the sliding block
from being burn out. In this
case, care must be taken to not
let water enter the pipe.
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Instructions