Gree TERRA09HP230V1A Installation, Service & Troubleshooting page 80

E4 Error Code
E4
High Discharge Temperature Protection of
Compressor.
Status:
Cooling operation, compressor stops while
indoor fans runs. Heating operation, complete
unit stops
Start Troubleshooting
Is outdoor temperature above 127
Remove power, then restart after 20
minutes
Are indoor and outdoor coils clean
and free from obstructions?
Yes
Are indoor and outdoor fans
operating properly?
Yes
Replace AP1 control board
End Troubleshooting
80
Error Code Diagnostics
Normal protection, outdoor
Yes
F ambient is higher than normal
0
parameters
No
Clean Coils
1. Check fan for obstruction
No
2. Check resistance of fan
leads and voltage to
motor
3. Check fan connections
Replace fan
1. Faulty outdoor temperature sensor
2. Refrigerant leak
3. Poor airflow of outdoor unit
4. Follow Troubleshooting procedure
Outdoor Fan Connection