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Installation & Operation Manual -
VFH-MB 09/12/18/24 Series
3
6
Did this e
liminate
the malfunction
?
End
no
no
no
no
no
no
no
no
yes
yes
yes
yes
yes
yes
yes
yes
yes
All the indoor units
show
communication malfunction
De-energize,check if the connection
wire of indoor and outdoor unit and
the wire of the eletric box is
connected correctly
Connected correctly?
Reconnect according to
the wiring diagram
Connected correctly?
Reconnect according to
the wiring diagram
De-energize, check if the connection wire between
the outdoor mainboard and the filter board
according to the wiring diagram
Is t
he connection wire broken?
Replace the
connection wire
Check if there is power input
between the neutral wire and live
wire of the outdoor main
board
Is t
here power input?
Replace the filter board of
the outdoor unit
Resume communication?
Replace the outdoor
mainboard
Replace indoor
mainboard
Did this e
liminate
the malfunction
?
Did this e
liminate
the malfunction
?
Did this e
liminate
the malfunction
?
Summary of Contents for B-VFH18MB-1
Page 39: ...Installation Operation Manual VFH MB 09 12 18 24 Series 39 Exploded View Model B VFH12MB 1...
Page 41: ...Installation Operation Manual VFH MB 09 12 18 24 Series 41 Exploded View Model B VFH18MB 1...
Page 43: ...Installation Operation Manual VFH MB 09 12 18 24 Series 43 Exploded View Model B VFH24MB 1...