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

E6 Error Code, continued

Communication Failure of All Indoor Units

Communication failure of all
indoor units
De-energize, check the wire connections of indoor
and outdoor units and power to outdoor unit
Are all connections correct?
De-energize, check the wire connection between
the outdoor main board and the filter board for
correctness
Are all connections correct?
Is the connection wire broke?
Check to see if there is power input between the
neutral wire and live wire of the outdoor main
board
The malfunction indoor unit resumes
normal
Check the input power
Replace the outdoor main board
Are units now communicating
Yes
End Troubleshooting
Error Code Diagnostics
No
Correct connections
No
Correct connections
No
Correct connections
No
Replace the filter board of
No
Replace the indoor main
Did this correct the
Did this correct the
Did this correct the
the outdoor unit
board
Yes
problem?
No
Yes
problem?
No
Yes
problem?
No
Did this correct the Yes
problem?
No
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