Toshiba BMS-IFBN1281U-UL User manual

Model name:
BMS-IFBN1281U-UL
SERVICE MANUAL
BN interface
FILE No. A10-2302-1
Revision 1: Oct., 2023
PRINTED IN JAPAN, OCT., 2023 TBEX

2-EN
BN interface Service Manual
Contents
Precautions for safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1 Product Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2 Hardware Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2-1. BMS-IFBN1281U-UL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2-2. Component Names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2-3. Internal board block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3 Software Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3-1. BACnet Communication Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3-2. Connectable Air Conditioners . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3-3. BACnet Object List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3-4. Object Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4 Factory default settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
5 Items included with the product. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
6 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
7 Power and signal line connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
8 Startup and Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
8-1. Startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
8-2. Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
9 Test run. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
9-1. BACnet Communication Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
9-2. Indoor Unit Device Information Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
9-3. Search Results File (SearchObjectLog.tsv) . . . . . . . . . . . . . . . . . . . . . . . . . 88
9-4. LED Display During Normal Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
10 Engineering Tool . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
10-1. IP Address Setting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
10-2. BACnet Device Object Instance Number Setting . . . . . . . . . . . . . . . . . . . . . 92
10-3. Acquiring the Search Results File (SearchObjectLog.tsv) . . . . . . . . . . . . . 93
10-4. Searching for the BN interface IP Address . . . . . . . . . . . . . . . . . . . . . . . . . . 94

3-EN
BN interface Service Manual
11 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
11-1. During test runs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
11-2. When starting up BN interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
11-3. When Using BN interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
11-4. Directly After Changing the microSD Card (Service Component) . . . . . . . 99
11-5. When the Power Supply to the Indoor Units Is Interrupted. . . . . . . . . . . . . 99
12 Replacing Service Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
12-1. Replacing the microSD Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
12-2. Replacing the Power Adaptor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
13 Service Component List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
14 Systems in which the BN interface is used in conjunction with another
air conditioning controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
14-1. Compatible Air Conditioning Controllers . . . . . . . . . . . . . . . . . . . . . . . . . . 104
14-2. System for Combination Use with the TOUCH SCREEN CONTROLLER
(BMS-CT5120UL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
14-3. System for Combination Use with Smart BMS Manager . . . . . . . . . . . . . . 107
14-4. System for Combination Use with Touch Screen Controller
(BMS-CT2560U-UL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
14-5. System for Combination Use with Central Remote Controller
(TCB-SC640U-UL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
15 Old BN interface product replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
15-1. BMS-IFBN640TLUL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
Installation Manual (BMS-IFBN1281U-UL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116

BN interface Service Manual
4-EN
Precautions for safety
• Carefully read these "Precautions for Safety" before service, and perform service work safely.
• These precautions contain important information regarding safety.
• After service work, carry out an operation trial to confirm that there are no problems, and explain to the customer how to
operate and maintain the system.
Expressions
Graphic symbols
Warning
Text set off in this manner indicates that failure to adhere to the directions in the warning could result
in serious bodily harm (*1) or loss of life if the product is handled improperly.
Caution Text set off in this manner indicates that failure to adhere to the directions in the caution could result
in serious bodily injury (*2) or damage (*3) to property if the product is handled improperly.
*1: Serious bodily harm indicates loss of eyesight, injury, burns, electric shock, bone fracture, poisoning, and other injuries which
leave aftereffect and require hospitalization or long-term treatment as an outpatient.
*2: Bodily injury indicates injury, burns, electric shock, and other injuries which do not require hospitalization or long-term treatment
as an outpatient.
*3: Damage to property indicates damage extending to buildings, household effects, domestic livestock, and pets.
" " indicates prohibited items.
The actual contents of the prohibition are indicated by a picture or text placed inside or next to the
graphic symbol.
" " indicates compulsory (mandatory) items.
The actual contents of the obligation are indicated by a picture or text placed inside or next to the
graphic symbol.
Warning
• Service should be performed by a qualified electrician
Attempting to carry out service work on your own, and doing so incorrectly, may result in electric
shock or fire.
• Electrical work must be performed by a qualified electrician in accordance with
this Service Manual. The work must satisfy all local, national and international
regulations
Inappropriate work may result in electric shock or fire.
• Be sure to turn off the power before starting work
Failure to do so may result in electric shock.
• Use only the power adapter supplied with this unit
A power adapter other than that supplied with this unit may provide a different voltage and have
different polarity (+) (−), which could lead to fire, explosion or generation of heat.
• Do not modify the unit
Doing so may result in excessive heat or fire.
The following instructions
must be observed.
Prohibited
Compulsory

BN interface Service Manual
5-EN
Trademarks
• BACnet®is a registered trademark of the American Society of Heating, Refrigerating and Air-Conditioning Engineers
(ASHRAE).
• Ethernet®is a registered trademark of Xerox Co., Ltd.
•microSD
TM is a registered trademark of SD Card Association.
• Windows®is a registered trademark of Microsoft corporation.
• All other company and product names are either registered trademarks or trademarks of the respective owners.
In this manual such names are not indicated by TM, ® or © marks.

BN interface Service Manual
6-EN
1Product Overview
BN interface relays communications between Building Management Systems and VRF Systems in order to observe and control
the VRF Systems from Building Management Systems. The communication protocol used between Building Management
Systems and the BN interface is BACnet, an open network communication protocol for building automation.
BACnet Protocol Revision is ANSI/ASHRAE Standard 135-2012 (Revision15).
This product is for use when connected to TU2C-LINK Uh Line (hereinafter referred to as Uh Line).
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BN interface
Building Management System
Power adapter Power Supply
Uh Line / TCC-LINK
Outdoor unit
Outdoor unit
Indoor unit Indoor unit
Remote
controller Remote
controller
Open network protocol
BACnet protocol (BACnet/IP)
Remote
controller
Indoor unit Indoor unit Indoor unit Indoor unit
Remote
controller
Remote
controller
Up to 128 indoor units can be connected to 1 BN interface.
CAUTION
A central control address must be set for the indoor units.

BN interface Service Manual
7-EN
2Hardware Specifications
2-1. BMS-IFBN1281U-UL
Specifications
External View (BN interface equipment) Unit: inch (mm)
Power supply Rated voltage 120 V AC 60 Hz
Power consumption 10 W
Operating temperature range 32 to 104°F (0°C to 40°C), 10% to 80% RH (no condensation)
Storage temperature range 14 to 140°F (−10°C to +60°C), 10% to 90% RH (no condensation)
Dimensions Width 7.87 inch x Height 3.94 inch x Depth 2.32 inch
(Width 200 mm x Height 100 mm x Depth 59 mm)
Mass BN interface 1.7 lb (765 g)
Power adapter 1.0 lb (450 g)
Number of connected
units
Indoor unit Up to 128 units (TU2C-LINK)
Up to 64 units (TCC-LINK)
2.32″ (59)
3.94″ (100)
4.37″ (111)
(200)7.87″

BN interface Service Manual
8-EN
(Power adapter)
Ø5/8
"
(Ø15.0)
1.16"±0.01"
(29.6±0.5)
(1500.0±20.0)
59.05"±0.78"
(30±5)
1.18"± 0.19"
(110.0±0.5)
4.33"±0.01"
(62.0±0.5)
2.44
"
±0.01
"
(Ø5.5)
Ø7/32"
Ø3/32" (Ø2.5)
0.01" (0.5)
Ø1/2" (Ø12.0)
(6.5±0.3)
0.25"±0.01"
(33.0±0.5)
1.29"±0.01"
(7.5±0.3) 0.29
"
±0.01
"
+-
(2000±50)
78.74"±1.96"
FERRITE AS REQUIRED
WIRE NO:1185
GAUGE:16AWG (BLACK)
SPEC LABEL
LED
1.24"
(31.5)
MAX

BN interface Service Manual
9-EN
2-2. Component Names
External component names
Name Function
12V DCIN Connect the power adapter
USB (For service)
Ethernet (LAN) Connect to the Building Management System
Shutdown button Shutdown or switch to air conditioner search mode
LINK(Uh) Connect the central control wiring
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BN interface Service Manual
10-EN
Internal component names
SW100 Uh Line termination resistance setting switch
bit1:use, bit2:not use
Refer to " Termination resistance setting" (P.80)
Shutdown button Shutdown function / air conditioner search mode function button
Use this button to stop BACnet process and network process of the BN interface or to start up in the air
conditioner search mode. Note that button operation changes depending on how long it is depressed.
Time duration button is depressed Operation
The Shutdown button 2 times Stop BACnet process and network process of the BN interface.
4 seconds or more Start up in the air conditioner search mode.
Use the air conditioner search mode to set up equipment data in the
indoor unit.
Connector Description
COM port For maintenance
USB port Not used
HDMI Not used
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Unscrew and open the product
circuit board