28
Installation and Maintenance
Service Manual
(4) Communication malfunction (E6)
Disconnect power and check if
the connection wire of indoor
and outdoor units and the
built-in wire of electric box are
correctly connected.
Correct connection?
Connect the wire
properly according
to the wiring
diagram.
Is malfunction
eliminated?
Is malfunction
eliminated?
Is malfunction
eliminated?
Is malfunction
eliminated?
Main board matches with display
board? Main board of IDU
matches with that of ODU?
Match correctly
according to
product
specification.
Connection of communication
wire is damaged or not?
Replace the
connection wire.
Replace the main
board of IDU.
Replace the main
board of ODU.
End
No
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Troubleshooting for E6
malfunction
