Gree GWH(07)RA-K3DNA1A/I Service Manual page 36

9.2.5 E6 Malfunction
Communication malfunction of
De-energize the unit and check
if the connecting wire of indoor
and outdoor unit and wiring of
De-energize the unit. Change the communication cable
of indoor units. Energize the unit and wait for 3 min
mainboard of the indoor unit
34
some indoor units
electric box are correct.
Is wire connected
correctly
Yes
Does the
broken-down indoor
unit resume normal?
No
Replace the broken-down
End
Connect wires
No
according to the
wiring diagram
Yes
Replace mainboard
of outdoor unit
Troubleshooting
Yes
Is malfunction
removed
No