Troubleshooting

Alarm Issues

Alarm, (False) Fan Fail

Check configuration. Be sure the Fan Status option is not selected when there is no sensor/ switch for it.

Check that the IN2 (fan status) input pull-up resistor switches are fully latched in the correct positions. Any passive, dry contact should use the 10K Ohm setting. (See the Connections and Wiring section of the relevant BAC-10000 Series Installation Guide.)

Check IN2 (fan status) input wiring.

Check the connected fan status sensor/switch.

Using BACstage or TotalControl, check that AI2 (fan status) is not configured as “Out Of Service.”

Alarm, (False) Low Limit (Freeze Stat)

Check the Low Limit Alarm setting—see Damper Setup on page 5.

Check configuration. Be sure the Economizer option is not selected when there is no mixed air temperature sensor.

Check that the IN3 (mixed air temp.) input pull-up resistor switches are fully latched in the correct positions (see the Connections and Wiring section of the relevant BAC-10000 Series Installa- tion Guide).

Check IN3 (mixed air temperature) input wiring.

Check the connected mixed air temperature sensor.

Using BACstage or TotalControl, check that AI3 (mixed air temp.) is not configured as “Out Of Service.”

NOTE: After a low limit alarm is generated, the fan will not run until after the FlexStat is restarted. See Resetting the FlexStat on page 14.)

Alarm, (False) Space Temp. or Humidity

See Alarms on page 11.

See Temperature Reading Is Incorrect on page 19.

See Temperature Setpoint Is Not Maintained on page 19.

Using TotalControl, adjust the limits or time delay.

Communication Issues

Firmware Upgrade Fails

Ensure the WD (watch dog) jumper is temporar- ily removed during the upgrade process (see the KMD-5699 Installation Guide, P/N 913-019-04).

Reinstall the pin on the left and center pins after the upgrade process is complete.

Check connections.

Ensure firmware for the correct model is selected in the Firmware Upgrade Tool.

NOTE: If firmware for a wrong model is acciden- tally installed, the outputs will not match the applications/configuration on the display.

NOTE: Backing up the existing settings and firmware image before or during the upgrade process is good practice.

NOTE: Restoring to the factory defaults and reconfiguring might be needed if how the FlexStat operates changes. Read all notes accompanying the firmware update!

KMD-5576 Communication Faulty

Upgrade to the latest version of BACstage (ver. 2.4.0.25 or later required).

Check the settings for the USB port on the computer (Device Manager > Ports) and the MS/TP port in BACstage (Access > Connection Parameters).

Reduce the Max Master number down to the minimum needed for that network—see (Ad- vanced) BACnet Communications on page 7.

Install latest driver and check latency settings. See Latency Settings for KMD-5576 Service Bul- letin (SB0308A) on the KMC web site.

See also MS/TP Network Communication Faulty below.

MS/TP Network Communication Faulty

Reduce the Max Master number down to the minimum needed for that network—see (Ad- vanced) BACnet Communications on page 7.

Check that EOL switches are fully latched in the correct positions (see the relevant BAC-10000 Series Installation Guide).

Check MAC address and device instance num- bers.

Check baud rate.

BAC-10000 Series

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Operation Guide, Rev. J

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KMC BAC-10000 manual Troubleshooting, Alarm Issues, Communication Issues

BAC-10000 specifications

The KMC BAC-10000 is a cutting-edge building automation controller designed to offer exceptional performance in monitoring and controlling HVAC systems, lighting, and various other building systems. This advanced controller is engineered to enhance energy efficiency, improve occupant comfort, and provide streamlined building management capabilities.

One of the main features of the KMC BAC-10000 is its versatility. It supports a wide variety of communication protocols, including BACnet, Modbus, and LonWorks. This multi-protocol capability allows for seamless integration with existing building systems, ensuring that users can easily incorporate the BAC-10000 into their building management setup without the need for additional hardware or extensive modification.

The controller is equipped with an intuitive user interface that simplifies the management of building systems. It includes a graphical display that provides real-time data, enabling operators to monitor system performance, adjust settings, and troubleshoot issues with ease. This user-friendly design promotes efficient operation and reduces the learning curve for new users.

In terms of technical specifications, the BAC-10000 boasts a powerful microprocessor and an extensive range of I/O points, allowing it to handle large and complex building automation tasks. With support for both digital and analog inputs and outputs, users can customize their setup to meet specific operational requirements.

Another standout feature of the KMC BAC-10000 is its advanced data logging capabilities. The controller can record historical data for various parameters, which can be crucial for performance analysis and optimization. This functionality enables facility managers to identify patterns, predict maintenance needs, and ultimately enhance the overall efficiency of their systems.

Security is also a priority with the BAC-10000, as it includes multiple layers of security protocols to protect against unauthorized access and tampering. This ensures that sensitive building management data remains safe and that users can operate the controller confidently.

In conclusion, the KMC BAC-10000 is a robust and flexible building automation controller that offers extensive features and technologies for effective building management. Its multi-protocol support, user-friendly interface, advanced data logging, and emphasis on security make it a top choice for modern building automation needs. By choosing the BAC-10000, facility managers can optimize energy usage, improve occupant comfort, and streamline operations within their buildings.