GREE GMV5E DC INVERTER VRF UNITS SERVICE MANUAL
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Error judgment condition and method:
Test compressor suction pressure through low pressure sensor. When pressure value is lower than
-41
°C
, the unit will stop for protection.
Possible reason:
■Cut-off valve of ODU is not fully opened;
■Low pressure sensor is abnormal;
■Outdoor or indoor fan is not working properly;
■IDU filter or air duct is blocked (cooling mode);
■Ambient temperature is too low;
■Refrigerant charging amount is insufficient;
■System pipeline is blocked;
