Gree TERRA09HP230V1A Installation, Service & Troubleshooting page 86

F6 - F9 Temperature Sensor Codes
See troubleshooting chart next page
F6
Decrease frequency due to overload.
Status:
All systems operate normal with decrease in
capacity
F7
Oil Return in Cooling
F8
Decrease frequency due to overcurrent.
Status:
All systems operate normal with decrease in
capacity
F9
Decrease frequency due to high discharge
air.
Status:
All systems operate normal with decrease in
capacity
86
Error Code Diagnostics
Fault & Status Possible Causes
1. Refer to "E8" troubleshooting procedures
Normal function
1. Input voltage too low.
2. System pressure is too high
1. Cooling load is too great
2. Outdoor ambient too high
3. Refrigerant undercharge
4. Electronic expansion valve fault