Gree GMV6 DC Inverter VRF Units Service Manual
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pipeline is in the high-pressure and high-temperature status, while E and S indicate that the pipeline is in
the low-pressure and low-temperature status; when the system runs in the heating mode, E indicates that
the pipeline is in the high-pressure and high-temperature status, while C and S indicate that the pipeline
is in the low-pressure and low-temperature status; the pipe marked by D is connected to the air outlet
and remains in the high-pressure and high-temperature status. When the unit is being started, defrosting
and conducting oil return, the 4-way valve produces obvious valve pushing sound. Do not touch the
pipeline with hands. Otherwise, you may get scalded.
3) Oil-return solenoid valve: It can be diagnosed based on the oil-return valve status displayed on
the monitor program and the actual operation. When the balance valve is open, the coil heats
up and the lubricant flow before and after the valve is obvious.
Oil-return
valve 1
Oil-return
valve 2
Auxiliary
oil-return valve
Step 4:
Test the compressor drive board (IPM module).
1:
Disconnect the power and wait five minutes, and unplug the compressor cable.
2:
As shown in the figure, switch the multimeter to the diode gear. Point the black probe to the P
bonding pad and the red probe to the L1 wiring terminal. In the normal condition, the multimeter will not
beep. If it does, the drive board is damaged and needs to be replaced.
