Gree GMV-120WM/B-F

GMV5 D.C INVERTER MULTI VRF SERVICE MANUAL
214
Step 5: Remove faulty compressors.
Confirm faulty compressors, including number of faulty ones, compressor position, and model.
Handling procedure varies with compressor model.
Inverter compressors and oil quality
If the inverter compressor is damaged, or the oil of the fixed speed compresor is contaminated,
remove the inverter compressor.
After the compressor and oil separator are removed, check oil quality. If oils are contaminated,
replace the compressor, oil separator, and gas/liquid separator. If oil changes to black, check oils of
other modular units. The check procedure is similar to the preceding.
Note: Before replacing the faulty compressors, make sure to block their openings with tapes. They
should be kept intact for further analysis.
Step 6: Check system parts.
If system oil is contaminated, check unit parts, including oil separator, gas/liquid separator, and
storage tank.
1) Check oil separator.
Remove the oil separator. For the removal procedure, refer to step 4. Tilt the separator to draw oil
out into a container. Block the container for further factory inspection.
Gas
pipe
Liquid
pipe
Balance pipe
Low pressure
check valve
Oil checking
valve
Refrigerant should be
released from the high
pressure side and low
pressure side at the
same time. Control the
release speed. At the low
pressure side, refrigerant
is released through the
low pressure check valve.
At the high pressure
side, refrigerant is
released through
the high pressure
sensor.