MCAC-VTSM-2016-04
R410A DC Inverter VRF V4 Plus W Series 50Hz
Troubleshooting 219
Step 3:
Replace the compressor
Note
:
1. Before dumping the oil, shake the compressor, oil separator and gas-liquid separator first, because impunity
may deposit at the bottom of the tank.
2. If the oil of the inverter compressor is clean, there
’s no need to check the oil of fixed compressors. If the oil of
the inverter compressor has gone bad, check the oil of fixed compressors is necessary. If all the oil of an
outdoor unit needs to be replaced, after adding oil to the compressors, the rest oil should be charged to the
Pour out all of the oil from the compressor,
oil separator and gas-liquid separator
The oil is dirty
Check the filter between the ball
valve and the 4-way valve
The filter is blocked by impunity
Clean the filter screen with
nitrogen, or replace the filter
Replace the compressor which
has been damaged
Add clean oil to the new compressor,
and low-pressure accumulator
Replace the oil separator and
low-pressure accumulator
Weld the pipes, vacuum drying the
system and recharge refrigerant
Make sure all the wire connection is
OK, restart the system
The oil is clean
The filter is clean
Pour out some oil from compressor; check
the quality of the oil
The oil is dirty
The oil is clean