101
Communication Malfunction of Outdoor Unit E6 Error Code continued
Troubleshooting 18,000 & 24,000 Units
Communication failure
outdoor units
End Troubleshooting
Did this correct the
problem?
Yes
No
De-energize, check the wire connections of indoor
and outdoor units and power to outdoor unit
Correct connections
De-energize, check the wire connection between
the outdoor main board and the filter board for
correctness
No
Replace the outdoor main board
Are all connections correct?
Did this correct the
problem?
Yes
No
Correct connections
No
Are all connections correct?
Did this correct the
problem?
Yes
No
Correct connections
No
No
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
Check the input power
The malfunction indoor unit resumes
normal
Did this correct the
problem?
Yes
No
Replace the filter board of
the outdoor unit
Replace the indoor main
board
No
Are units now communicating
Yes
