Is the CAN bus matched
resistance is installed correctly?
Start
After connecting unit multisystem, set the
centralized control address and IDU engineering
code of the unit to avoid C5 and CJ malfunction
Check BADnet gateway installation,
communication connection and dial-
up setting are correct
AC unit and BACNet gateway
power off (this step can be
cancelled if it is already power off)
Yes
No
Energize the AC unit
Energize the BACnet gateway
If BACnet gateway
power LED always on?
Check if the operation light is
blinking? (Blink once every 1s)
Communication between BACnet
gateway and AC unit is normal,
AC unit data can be received
End
Yes
Yes
No
No
Conduct setting by refering
to the dial-up setting in “1.
Hardware debug”
Check supply voltage and
power connecting cable
BACnet gateway cannot
work normally, replace
other BACnet gateways
Check if BACnet gateway CAN
RX/TX light is blinking?
Abnormal condition
treatment 1
No
Yes
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