Gree GMV5E Series Service Manual page 179

GREE
Troubleshooting:
Does the low pressure shown
on the pressure gauge reach the
Is there enough refrigerant?
of the outdoor unit's fluid and air
Check if the outdoor unit is well
exhaust outlets of indoor and
Check if the fans of the indoor
and outdoor units work properly?
Check if the swing of the indoor
Check if the capacity of IDU set by
the rated capacity DIP switch
exceeds the allowed value range?
Check if electronic expansion
valves of indoor and outdoor units
Check if the return air filter of the
indoor unit is dirty or blocked?
E3 system low pressure
protection
protection value?
Yes
No
Check if stop valves
tubes are fully opened.
Yes
covered?
Yes
Check if intake and
outdoor units are blocked.
No
Yes
unit is fully opened?
Yes
Yes
work properly?
Yes
No
The pipeline is blocked.
GMV5E DC INVERTER VRF UNITS SERVICE MANUAL
No
The low pressure sensor fails,
Replace the pressure sensor
Yes
Add refrigerant according to
the design and pipeline.
No
Fully open the stop
valves.
No
Re-install the panel.
Yes
Remove the
obstacle.
No
Check the input signal of
the fans. Replace the
motor or main board.
Check output signals of the
No
swing motor and main board.
Replace the swing motor or
main board.
Yes
Set the indoor unit's rating
capacity in the permitted range.
No
Replace electronic expansion
valves or main board.
Yes
Clean the filter.
Check the pipeline, especially the
section between the outdoor unit and
the indoor unit's first branch pipe.
175