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85
Troubleshooting
9,000 & 12,000 Units
Communication Failure
E6
Communication Failure
Status:
Cooling operation, compressor stops while
indoor fans runs. Heating operation, complete
unit stops
1. Improper voltages
2. Mis-matched indoor and outdoor units
3. Improper wiring between indoor and outdoor
units
Communication failure of
some units
Replace outdoor main board
End Troubleshooting
Are all connections
correct?
Did this correct the
problem?
Yes
Yes
Yes
No
De-energize, check the wire
connections of indoor and outdoor
units and power to outdoor unit
Correct connections
The malfunction
indoor unit
resumes normal
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
No
Replace the main board of the malfunctioning
indoor unit
Содержание GWH09KF-A3DNB1A
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