Toshiba Carrier BMS-IFBN1281U-UL Service Manual page 114

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 Central Remote Controller.
If there is a communication collision on Uh Line between the Central Remote Controller and BN interface, the indoor units
cannot be properly communicated with, and a setting file cannot be created.
(7) After completing all of the procedures to set up the BN interfaces, power on the Central Remote Controller.
NOTE
As the Uh line main bus master controller, the Central Remote Controller performs regular communication with the indoor units
to acquire their operation 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 Central Remote 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