Gree TERRA09HP230V1A Installation, Service & Troubleshooting page 82

E6 Error Code
E6
Communication Failure
Status:
Cooling operation, compressor stops while
indoor fans runs. Heating operation, complete
unit stops
Repair wiring, fault is
detected with control
board voltage
Yes
Is system
operating properly
Yes
82
Error Code Diagnostics
Start Troubleshooting
Did the unit operate normally before
the error occurred?
Check factory wiring of indoor and
outdoor units
Yes
Is wiring damaged?
No
No
Communication circuit
problem?
No
Replace indoor board
AP2
End Troubleshooting
1. Improper voltages
2. Mis-matched indoor and outdoor units
3. Improper wiring between indoor and outdoor
units
Check for proper wiring of
No
indoor and outdoor units with
unit wiring diagram
Are all connections
Yes
Correct connections
No
Did this correct the
Yes
Replace outdoor
main board AP11
No Is system
operating properly
Yes
correct?
No
Yes
problem?
Yes