GREE GMV5E DC INVERTER VRF UNITS SERVICE MANUAL
253
Step 3: Release refrigerant.
Refrigerant should be released from the high pressure side and low pressure side at the same time.
If it is released from one side only, the scroll is sealed, causing the refrigerant to fail to be released
completely. Control the release speed (it is expected to release for 12 hours or more). If too fast, massive
lubricant will be discharged with the refrigerant. Make sure to mark the valves.
Step 4: Remove faulty compressors.
Confirm faulty compressors, including number of faulty ones, compressor position, and model.
If the inverter compressor is damaged, or the oil of the fixed speed compresor is contaminated,
remove the inverter compressor. The procedure is as follows:
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.
1. Inlet of inverter
compressor
2. Outlet of
inverter
compressor
3. Unscrew the
compressor
Inve
rter comp
resso
r
