Gree GMV-VQ280WM/C-X Owner's Manual page 15

GMV Heat Recovery DC Inverter VRF
When the pressure gauge reads 0~0.05MPa, completely close the low pressure side valve
(air valve), and then immediately stop operation and cut off the power.
(6) When recovering the refrigerant, it is necessary to ensure that the connection pipe can be
disassembled only after the liquid valve and the air valve are completely closed and the
power is turned off. If disassembling the connection pipe when the power hasn't been cut off
and the compressor still running, the air will be mixed into the system and then the pressure
will rise, which will cause compressor explosion.
(7) When installing the unit, make sure that the connection pipe is securely connected before
turning on the compressor. If the compressor is turned on before the connection of the
connection pipe is completed and the shut-off valve is opened, the air will be mixed into the
system and then the pressure will rise, which will cause compressor explosion.
(8) Wiring between indoor unit and outdoor unit must be properly connected by adopting the
specified electric wires and the terminals should be fixed well and not affected by external
forces. Poor connection or fixing may cause a fire accident.
(9) No connection is allowed in the middle of the wire. When the length of the connection wire is
not enough, please contact the designated service store to re-equip a dedicated electric wire
with sufficient length.
11