High Discharge Temperature Protection Of Compressor - Gree Neo GWH09MA-A3DNA3A Installation, Service & Troubleshooting

E4 Error Code

High Discharge Temperature Protection of Compressor.

E4
High Discharge Temperature Protection of
Compressor.
Status:
Cooling operation, compressor stops while
indoor fans runs. Heating operation, complete
unit stops
Start Troubleshooting
Has the compressor discharge
temperature reached 239
Yes
Check the system for refrigerant leaks, Repair,
evacuate and charge per instructions in
"Charging" section
144
Error Code Diagnostics
No
Is resistance of temperature
F
0
sensor correct?
Replace the outdoor
unit circuit board
1. Faulty outdoor temperature sensor
2. Refrigerant leak
3. Poor airflow of outdoor unit
4. Follow Troubleshooting procedure
No
Yes
Replace sensor