GREE GMV5E DC INVERTER VRF UNITS SERVICE MANUAL
173
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
°C
, 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:
2.2.4.56 “E3” System low pressure protection
Error display:
ODU mainboard, IDU wired controller and IDU receive light board will
display
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