User Guide

Installation & Operation Manual - VFH-MB 09/12/18/24 Series
34
4. E6 Malfunction
Did this eliminate the
malfunction?
End
Communication malfunction of some
indoor units
De-energize,check if the connection
wire of indoor and outdoor unit and
the wire of the eletric box is
connected correctly
no
no
no
Connected correctly
Reconnect according to
the wiring diagram
yes
yes
yes
De-energize, change the communication wire of the
well-communicated indoor unit and malfunctioning
indoor unit, then energize the unit and wait for 3min
The malfunctioning indoor unit
resumes normal operation
Replace outdoor
mainboard
Replace the main board of the
malfunctioning indoor unit