Gree GUD24W2/D-D(U) - Page 32

GREE DC INVERTER HEAT PUMP CONDENSING UNIT SERVICE MANUAL
29
Troubleshooting
：
3.4.3 “E4” Compressor Air Discharge High-temperature Protection
Error display:
ODU mainboard LED displayer
Error judgment condition and method:
Test the compressor discharge temperature through compressor discharge pipe and shell top temperature
sensor. If the tested temperature value is higher than 115
℃
, the unit will stop for protection.