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Service Manual
12.Communication malfunction (E6)
Main detection points:
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E6
If the unit operates normally
before malfunction
Check the connection
wire according to the
wiring diagram.
Check built-in wiring
of indoor and outdoor
unit
Replace the
wire
Is the malfunction
eliminated?
If the connection wire
is connected well?
Reconnect the wire or
replace the connection
wire according to the
wiring diagram.
If the wiring is
damaged?
Check the malfunction
type with communication
malfunction detector
Malfunction of outdoor
communication circuit
Replace indoor
mainboard AP2
Is the malfunction
eliminated?
Replace outdoor
mainboard AP1
Is the malfunction
eliminated?
End
58
Installation and Maintenance