Notice
Carrier is committed to continuously improving its products to ensure the highest quality and reliability standards, and to meet local regulations and market requirements. All features and specifications are subject to change without prior notice.
Contents
Precautions for safety
The following instructions must be observed.
- Carefully read these "Precautions for Safety" before installation, and perform installation work safely.
- These precautions contain important information regarding safety.
- After installation 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. Ask the customer to keep this Installation Manual.
Expressions
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.
Graphic symbols
Prohibited: ? indicates prohibited items. The actual contents of the prohibition are indicated by a picture or text placed inside or next to the graphic symbol.
Compulsory: ✅ 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.
Warnings
- Installation and reinstallation should be performed by your dealer or a qualified electrician. Attempting to carry out installation 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 Installation 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.
Warning: This is a class A product. In a domestic environment this product may cause radio interference in which case the user may be required to take adequate measures.
Introduction
Overview
The BN interface is equipment used for controlling Building Management Systems (Procured locally) and air conditioners "TU2C-LINK Uh Line (hereinafter, referred to as Uh Line) compatible models" through communications via a network to enable central control.
Included Items
| Component | Qty | Remarks |
|---|---|---|
| BN interface equipment | 1 | BN interface power supply (not include Power Cable) |
| Power adapter | 1 | |
| Pin terminal | 2 | Uh Line caulked connectors |
| Mounting bracket (DIN rail) | 1 | Use screws to secure the unit in locations without DIN rails (walls, etc.) |
| Screws (M4 x 12) | 2 | For securing the DIN rails |
| Installation Manual | 1 | This manual |
| License Agreement | 1 | |
| License Information | 1 |
Specifications
| Power supply | Rated voltage: 220-240 V AC 50/60 Hz Power consumption: 10 W |
| Operating temperature range | 0°C to 40°C, 10% to 80% RH (no condensation) |
| Storage temperature range | -10°C to +60°C, 10% to 90% RH (no condensation) |
| Dimensions | Width 200 mm x Height 100 mm x Depth 59 mm |
| Mass | BN interface 765 g Power adapter 450 g |
| Number of connected units | Indoor unit: Up to 128 units (TU2C-LINK) Up to 64 units (TCC-LINK) |
External View (BN interface equipment)
Diagram showing the BN interface equipment with dimensions. The unit is a rectangular box. Key dimensions indicated are: Width 200 mm, Height 100 mm, Depth 59 mm. Various ports and connectors are visible on the front and rear panels, including Ethernet (LAN), USB, LINK (Uh), 12V DCIN, and a shutdown button.
Power and Signal Line Connections
Cables
Use the following cable for signal line connections (Procured locally):
| No. | Line | Type | Wire size | Length | Description |
|---|---|---|---|---|---|
| 1 | For Uh Line | 2-core shielded wires | Refer to "Design of Control Wiring" (P.10 to P.12) | ||
| 2 | For Ethernet® | LAN cable (higher than Category 5, UTP) | 100 m max. | The appropriate use of straight cable/cross cable should be done depending on your system used. Ethernet® is a registered trademark of Xerox Co., Ltd. |
Cable Connections
Connect the cables to the specified connectors.
Diagram showing the connection of the Uh Line communication cable. It illustrates stripping the cable end (50mm and 10mm sections) and connecting a pin terminal. It also notes that the Uh Line communication cable must be earthed on the air conditioner, and the shield wire should not be connected to the connector but left open and insulated.
The diagram also shows the location of the Uh Line connector, Ethernet (LAN) connector, 12V DCIN connector, and the Shutdown button on the BN interface unit.
Connection points:
- Connection of Uh Line communication cable
- Connect the LAN cables
- Connect the supplied power adapter
CAUTION: The Uh Line communication cable has no polarity.
Secure the Uh Line communication cable and power cable to the switchboard etc. using the supplied cable tie to ensure that no excess load is placed on the power cable connection and Uh Line communication cable connection.
Example of System Wiring Connections
Diagram illustrating a typical system wiring configuration. It shows the BN interface connected to a power adapter and power supply. The BN interface is linked via Ethernet (LAN) to a Building Management System (BMS) and via Uh Line to multiple outdoor units. Each outdoor unit is connected to indoor units and remote controllers. The diagram also shows connections for LINK1 and LINK2, and a touch screen controller (40VCC73-8FJEE).
Settings
3-1. Switch setting
- SW100: Uh Line termination resistance setting switch. Bit 1: use, Bit 2: not use. Refer to "Termination resistance setting" (P.9).
- 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. Button operation changes depending on how long it is depressed.
- 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.
Diagram shows the inside of the BN interface unit after unscrewing and opening. It highlights the SW100 switch and the Shutdown button on the circuit board.
3-2. LED
| LED | LED color | Use |
|---|---|---|
| POWER | Red | Power indicator |
| RS485 | Green | Not use |
| LINK1(Uh) | Orange | Uh Line communication status indicator |
| LINK2(Uh) | Orange | Not use |
| ERROR | Red | Uh Line communication error indicator |
| L1 | Green | BACnet communication status indicator, setting error indicator |
Diagram shows the BN interface unit with labels pointing to the locations of LEDs: POWER, RS485, LINK1(Uh), LINK2(Uh), ERROR, and L1.
Factory default settings
| No. | Item | Factory default setting |
|---|---|---|
| 1 | IP address of BN interface | IP address: 192.168.1.100 Subnet mask: 255.255.255.0 |
| 2 | UDP port | 47808 (0xBAC0) |
| 3 | Device object instance number | 100 |
| 4 | Uh Line termination resistance select switch | OFF |
Test run
To perform test run of the BN interface, BACnet communication settings and the equipment data of the connected indoor units are required.
Items to be set during trial run
| Equipment | Item | Setting method | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Outdoor unit | Uh Line address | Line address | Use the DIP switch on the outdoor unit circuit board. | |||||||||||
| Indoor unit | Uh Line address | Unit address | Use the address setting function of wired remote controller. (Except for simple wired remote controller) | |||||||||||
| Central control address | ||||||||||||||
| Group address | ||||||||||||||
| BN interface | IP address | IP address | Use Setting File Creation Software 2. (See Section 5-1.) | |||||||||||
| BACnet communication device identification number | Network mask | |||||||||||||
| BACnet device object instance number | ||||||||||||||
| When using together with a central control device not compatible with Uh Line | Setting of old BN interface | Setting for combined use with old controller | When setup work (see Section 5-2) is performed, the BN interface reads out the set values from the indoor unit and records them on the SD card of the BN interface. Perform setup work after changing the device information of the indoor unit. | |||||||||||
| When using together with a central device compatible with Uh Line | ||||||||||||||
| When replacing with a BN interface that does not support Uh Line | Setting of old BN interface | |||||||||||||
| Indoor unit information (DN code setting values) | Line address | Unit address | Central control address | Group address | Operation mode setting range | Temperature setting range | Fan speed setting range | Flap type | Ventilation amount setting range | Ventilation mode setting range | Availability of ventilation operation | Availability of save function |
Note: The table above is complex and spans multiple columns for "Indoor unit information". For clarity, the detailed sub-items are listed here.
Indoor unit information items: Line address, Unit address, Central control address, Group address, Operation mode setting range, Temperature setting range, Fan speed setting range, Flap type, Ventilation amount setting range, Ventilation mode setting range, Availability of ventilation operation, Availability of save function.
5-1. BACnet communication settings
Set the IP address of the BN interface and the device object instance number of the BACnet communications. These settings can be configured using Setting File Creation Software 2. For details, contact your dealer.
5-2. Setting up equipment data in the indoor unit
Obtain the equipment data of the indoor unit that is controlled by the BN interface from the indoor unit via the Uh Line communication cable.
Preparing to set up equipment data in the indoor unit
- Central Control address must be set in the indoor unit you want to control. For information on how to set the address, refer to the installation manual of each indoor unit.
- Turn on all indoor and outdoor units. Set up as follows, waiting 10 minutes after turning on all the units.
Setup work
Step 1. Start the BN interface.
- Turn on the BN interface.
- The status of the LED L1 changes to LEDstatus-1, LEDstatus-2, and then to LEDstatus-4. It takes about 10 minutes for the LED L1 status to change to LEDstatus-4.
Step 2. Start up in the air conditioner search mode.
- Hold down the Shutdown button for 4 seconds or more.
- The status of the LED L1 changes to LEDstatus-7 and then to LEDstatus-8.
- When reading equipment information from the indoor units is successfully completed, the BN interface automatically prepares for BACnet communication.
- The status of the LED L1 changes to LEDstatus-1, LEDstatus-2, and then to LEDstatus-4. It takes about 10 minutes for the LED L1 status to change to LEDstatus-4.
- If an error occurs, then the status of the LED L1 will be LEDstatus-3. Refer to Section 5-3 to check for the cause of error generation.
When the BN interface is operating normally, the status of the LED L1 is LEDstatus-4.
LED L1 blinking
| Operation | LED status | Situation/processing | LED blinking pattern |
|---|---|---|---|
| Starting up | LEDstatus-1 | During initialization | ⚫⚫⚫⚫⚫⚫⚫⚫⚫⚫ |
| LEDstatus-2 | During BACnet connecting operation | ||
| LEDstatus-3 | File error during startup Other error during startup | ||
| While in operation | LEDstatus-4 | During BACnet communication | ⚫⚫⚫⚫⚫⚫⚫⚫⚫⚫ |
| Pressing the Shutdown button | LEDstatus-5 | During processing for BACnet software shutdown | ⚫⚫⚫⚫⚫⚫⚫⚫⚫⚫ |
| LEDstatus-6 | Shut down | ⚫⚫⚫⚫⚫⚫⚫⚫⚫⚫ | |
| Start up in the air conditioner search mode | LEDstatus-7 | During preparation for air conditioner search mode | ⚫⚫⚫⚫⚫⚫⚫⚫⚫⚫ |
| LEDstatus-8 | During air conditioner search | ⚫⚫⚫⚫⚫⚫⚫⚫⚫⚫ |
Diagram shows LED blinking patterns. ON is represented by a filled circle, OFF by an empty circle. The control interval (time length of 1 cell) is 200 ms.
5-3. Cause of problem occurring during setup
| Cause of problem | Cause | Action | |
|---|---|---|---|
| The indoor unit cannot be found. | The indoor and outdoor units have not been turned on. | Make sure that indoor and outdoor units are turned on. | |
| The indoor and outdoor units are being initialized and it is not possible to communicate with them. | Make sure that indoor and outdoor units are turned on. Make sure they have been on for at least 10 minutes. | ||
| LINK1(Uh) does not blink at all | The Uh Line cables have been incorrectly connected. | Connect the cables correctly. | |
| The central control address set in the indoor units are not unique. | The central control address has not been set in the indoor units. | Make sure that the central control address has been set in the indoor units. | |
| The same central control address has been set in a number of indoor units. | Make sure that the central control address has been correctly set in the indoor units. |
6 Turning off the BN interface
Press the shutdown button, then wait 5 minutes before turning it off.
When turning off the BN interface:
- Press the Shutdown button 2 times.
- The status of the LED L1 changes to LEDstatus-5 and then to LEDstatus-6.
- Disconnect the power adapter from the BN interface.
CAUTION: As the air conditioner search mode will be engaged if the shutdown button is pressed for 4 seconds or longer, do not hold down the button.
