GREE Photovoltaic Direct-driven Inverter Multi VRF Units
193
2.3.4.55 “E2” Compressor low discharge temperature protection
Error display:
ODU mainboard, IDU wired controller and IDU receive light board will
display
Error judgment condition and method:
Test the compressor discharge temperature and high pressure value. If the difference between
discharge temperature and high pressure value is lower than 10
℃
, the unit will stop for protection.
Possible reason:
■Exhaust temperature sensor failure
■In cooling mode, The IDU's electronic expansion valve is not working properly
■In heating mode, The ODU's electronic expansion valve is not working properly
■Too much refrigerant
Troubleshooting:
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