33
Technical Information
NO
Replace the filter board of
the outdoor unit
Eliminate the malfunction
Replace the
connection wire
Eliminate the malfunction
NO
Reconnect according to
the wiring diagram
Eliminate the malfunction
Connected correctly?
All the indoor units appear
communication malfunction
De-energize,check if the
connection wire of indoor
and outdoor unit and the
wire of the eletric box is
connected correctly
End
Check if there is power
input between the netrual
wire and live wire of the
outdoor mainboard
De-energize, check if the
connection wire between
the outdoor mainboard and
the filter board according to
the wiring diagram
The connection wire is
broken?
NO
Is there power input?
YES
YES
Replace the outdoor
mainboard
Reconnect according to
the wiring diagram
Eliminate the malfunction
YES
YES
YES
Connected correctly?
Resume communication?
Replace indoor mainboard
NO
NO
NO
YES
YES
YES
NO
YES
