Gree GMV-224WM/B-X, Service Manual

Page: 209 / 375

GMV5 DC INVERTER VRF UNITS SERVICE MANUAL
206
IV. Assembling and Disassembling Key Parts
of ODUs
Compressor
Precondition: No refrigerant exists in the pipeline system and the power supply has been disconnected.
Step Diagram Operation Procedure
1. Remove the front
panels.
●Use a screwdriver to unscrew
the upper and lower front
panels.
●Lift the front panels in order to
take it out.
Note: Both the upper panel and
lower panel are fixed with two
fasteners respectively to
connect to the side panels.
2. Disconnect the
power line of the
compressor, and
remove the electric
heating belt, top
temperature sensor,
and discharge air
temperature sensor.
●Remove the
sound-proof
sponge from the compressor.
●
Use a screwdriver to unscrew
the power line.
●
Remove the power line.
●Remove the electric heating
belt, top temperature sensor,
and discharge air temperature
sensor.
Note: Before removing the
power line, mark the colours of
the line and corresponding
wiring terminals.
3. Loosen the nuts of
the compressor.
●Use a wrench to unscrew the
four nuts.
4. Remove the
suction and
discharge pipes.
●Heat the suction and discharge
pipes by acetylene welding and
then remove the pipes.
●
During welding, charge
nitrogen into the pipes. The
pressure should be controlled
within 0.5±0.1 kgf/cm
2
(relative
pressure).
●
Avoid nearby materials from
being burnt during welding.