Gree GMV5

GREE Photovoltaic Direct-driven Inverter Multi VRF Units
257
2.3.4.140 “UE” auto charging of refrigerant is invalid
Error display:
ODU mainboard, IDU wired controller and IDU receive light board will
display
Error judgment condition and method:
When outdoor ambient temperature exceeds the temperature range of auto charging of refrigerant
(normal temperature range is 0~40
℃
), the unit will report this error.
Possible reason
：
——
Troubleshooting:
Cancel auto charging of refrigerant and change to manual charging of refrigerant.
2.3.4.141 Poor cooling and heating performances
Error judgment condition and method:
1.When electronic expansion valve is opened to 2000PLS in cooling operation of IDU and IDU coil
outlet pipe temperature is 5
℃
higher than inlet pipe temperature;
2.When electronic expansion valve is opened to 2PLS in heating operation of IDU and IDU coil
outlet pipe temperature is 12
℃
lower than saturated temperature corresponding to high pressure;
Possible reason
：
■ODU cut-off valve is opened to the max flow without following the requirement.
■System pipeline is blocked.
■Operation environment exceeds the range.
■Flow organization design is not good.
■Refrigerant charging amount is insufficient.