Toshiba Carrier BMS-IFBN1281U-UL Service Manual page 109

BN interface
NOTE
Before executing air-conditioning search mode, be sure to turn off the power to Smart BMS Manager.
If a communication collision occurs between Smart BMS Manager 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 Smart BMS Manager.
NOTE
As the master controller of the Uh Line main bus, Smart BMS Manager routinely communicates 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 Smart BMS Manager 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
Service Manual
-EN
109