Gree GWHD24NK3FO Service Manual page 73

Service Manual
Malfunction display: E4 Compressor Exhaust High Temperature Protection
Discharge temperature protection
Measure if compressor's discharge
temperature has reached 115℃
System pipeline leaks so complementation is needed.
Please add refrigerant according to the amount
specified in the nameplate
Malfunction display: E5 Compressor Overheat
Check if current value is higher than the protector's setting
Installation and Maintenance
Yes
Yes
Abnormal overcurrent
Yes
Check if compressor's connection line is
properly connected
Yes
Yes
If unit's high pressure is norma
Yes
If voltage is normal
Yes
Replace mainboard
Measure if temperature sensor's
No
resistance value is correct
Yes
Replace the outdoor
unit mainboard
No
No
l
No
No
Replace relevant discharge
No
temperature sensor
Adjust compressor's connection line
Replace overcurrent protector
R efer to high pressure protection
Contact the power supply
company
71