MAXA BDLM26A2 - Page 32

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All the indoor units appear
communication malfunction
De-energize, check the connection
wire of indoor and outdoor unit and
the wire of the electric box is
connected correctly
Connected correctly?
De-energize, check if the
connection wire between the
outdoor mainboard and the
filter board according to the
wiring diagram
Connected correctly?
The connection wire is broken?
Check if there is power input
between the neutral wire and live
wire of the outdoor mainboard
There is power input?
Replace the outdoor mainboard
Resume communication?
End
Reconnect according
to the wiring diagram
Eliminate the malfunction
Reconnect according
to the wiring diagram
Eliminate the malfunction
Replace the
connection wire
Eliminate the malfunction
Replace the filter board
of the outdoor unit
Eliminate the malfunction
Replace indoor mainboard
No
No
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes