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7. Communication malfunction(E6)
Replace the
wire
Is the malfunction
eliminated?
44
If the unit operates normally
before malfunction
Check built-in wiring
of indoor and outdoor
unit
If the wiring is
damaged?
Check the malfunction
type with communication
malfunction detector
Malfunction of outdoor
communication circuit
Replace indoor
mainboard AP2
E6
Replace outdoor
mainboard AP1
Is the malfunction
eliminated?
End
Service Manual
Check the connection
wire according to the
wiring diagram.
If the connection wire
is connected well?
Reconnect the wire or
replace the connection
wire according to the
wiring diagram.
Is the malfunction
eliminated?
Installation and Maintenance
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