Toshiba Carrier BMS-IFBN1281U-UL Service Manual page 106

BN interface
In the Setting File Creation Software2, enter the IP address for the BN interface and set the BACnet Device object numbers.
Once these have been entered, upload the settings file to the BN interface from the Setting File Creation Software2.
Once the settings file has been uploaded, the BN interface will automatically restart.
When the BN interface has properly started, LED-L1 is blinking in the Operating normal state in "Section 8-1.".
(6) Indoor Unit Device Information Settings (see Sections 9-2. through to 9-4.)
NOTE
Before executing air-conditioning search mode, be sure to turn off the power to the relay interfaces of the TOUCH SCREEN
CONTROLLER.
If a communication collision occurs between the relay interface and the BN interface at a Uh Line bus, proper communication
with the indoor units will be interrupted, preventing creation of the settings file.
(7) Repeat the above procedures (4), (5), and (6) for the second BN interface.
(8) After completing all of the procedures to set up the BN interfaces, power on the relay interfaces of the TOUCH SCREEN
CONTROLLER.
NOTE
As the master controller of the Uh Line main bus, the relay interfaces of the TOUCH SCREEN CONTROLLER routinely
communicate with the indoor units in order to ascertain their status.
The "LINK(Uh)" LED (orange) does not blink because the BN interface has stopped communicating with the indoor unit as a
result of being set for combination use.
When the power to the relay interfaces of the TOUCH SCREEN CONTROLLER is interrupted, the BACnet system is also
affected. This will result in a communication error with the indoor units.
NOTE
Whenever the following changes are made, the process described at step (6) (above) needs to be repeated.
• The central control address, Line address, or unit address of the indoor units is changed;
• The address of an individual or the base unit of the indoor remote control group is changed (line address, unit address);
• An indoor remote control group is added or removed;
• The display setting for the remote control for the indoor units (individual units, base unit) is changed.
• Operation mode
• Upper/lower limit for the temperature setting
• Availability of the ventilation function
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Service Manual