Communication Failure Of Some Indoor Units - Gree Neo GWH09MA-A3DNA3A Installation, Service & Troubleshooting

E6 Error Code

Communication Failure of Some Indoor Units

E6
Communication Failure
Status:
Cooling operation, compressor stops while
indoor fans runs. Heating operation, complete
unit stops
Communication failure of
some indoor units
De-energize, check the wire
connections of indoor and outdoor
units and power to outdoor unit
Are all connections
correct?
De-energize, change the communication wire
of the working/communication indoor unit and
malfunctioning/non-communicating indoor unit,
then energize the unit and wait for 3 minutes
The malfunction
indoor unit
resumes normal
Yes
Replace the main board of the malfunctioning
indoor unit
End Troubleshooting
146
Error Code Diagnostics
No
Correct connections
Yes
Replace outdoor main board
1. Improper voltages
2. Mis-matched indoor and outdoor units
3. Improper wiring between indoor and outdoor
units
Did this correct the
problem?
No
Yes