Midea MV6-252WV2GN1 Service Manual page 109

V6 VRF 50/60Hz
Step 8: Vacuum drying and refrigerant charging
 Once all the compressors and other components have been fully connected, vacuum dry the system and recharge
refrigerant. Refer to the V6 Engineering Data Book, Part 3.
Figure 6-2.10: Inspecting compressor oil
This oil is black
- it has been
carbonized
Cloudy or gray
oil indicates
abnormal
system
operation
108
This oil is a little
yellow, but is clear
and transparent and
the condition is
acceptable
This oil is still
transparent but there
are impurities which
may clog the filter
This oil contains
particles of copper