What does 'Changeover Fail' mean on my Johnson Controls Controller and how to fix it?
If your Johnson Controls Controller displays 'Changeover Fail', it indicates that the Supply Temperature Sensor is either not installed, has failed, or has been disconnected. As a result, the TEC can't detect the changeover mode for cooling or heating. You can follow the same troubleshooting steps as for a 'Supply Temp Fail' alarm.
How to resolve a 'Board Mismatch' error on my Johnson Controls Controller?
If your Johnson Controls Controller displays 'Board Mismatch', it means the baseboard and CPU board are not correctly paired. The TEC will show an error message with the model numbers of both boards. To fix this, match the baseboard to its corresponding CPU board.
What causes 'Humidity Unreliable' on a Johnson Controls Controller?
If the zone humidity reading on your Johnson Controls Controller was reliable but has now failed, and if the source of zone humidity was the onboard sensor, contact Johnson Controls product sales and support. If the source was a BAS, check the BAS to ensure it's online and providing the TEC with the humidity reading. If you intentionally removed the BAS mapping, reset the sensors through the menu.
How do I fix a 'Firmware Mismatch' error on my Johnson Controls Controller?
If your Johnson Controls Controller displays 'Firmware Mismatch', it means a previous upgrade or downgrade hasn't completed. If it's due to an incomplete upgrade, upgrade the TEC3000 to the latest released version, then upgrade it to the current version again. If it's an incomplete downgrade because the previous version is no longer supported, reboot the TEC3000 to clear the fault.
What to do if my Johnson Controls Controller shows 'Open Window'?
If your Johnson Controls Controller displays 'Open Window' and control has shut down, it means the switch connected to the BI configured for Open Window is sensing that a window is open. To solve this: First, close the window. If the problem persists, check the sensor functionality with an ohmmeter and verify the wiring to the TEC. If needed, order replacement units and return the affected devices to Johnson Controls under the RMA program.
Why does my Johnson Controls Controller show 'Fan Lock'?
If your Johnson Controls Controller displays 'Fan Lock' and control has shut down, it means the switch connected to the BI configured for Fan Lock didn't sense airflow within 10 seconds of starting the fan. Here's how to address it: First, inspect the equipment to ensure the fan functions. Next, check the sensor functionality with an ohmmeter and verify the wiring to the TEC. Then, reset the fault by going to the menu, selecting Fault Status, and choosing Fan Lock. If the problem persists, you may need to order replacement units and return the affected devices to Johnson Controls under the RMA program.
Why is 'Dehum Unavailable' on my Johnson Controls Controller?
If your Johnson Controls Controller displays 'Dehum Unavailable', it means dehumidification is unavailable because the zone humidity sensor has either failed or the humidity reading isn't reliable. If the zone humidity source was a BAS, check the BAS to ensure it's online and providing the TEC with the humidity reading. If you intentionally removed the BAS mapping, reset the sensors through the menu. If the problem continues, you may need to order replacement units and return the affected devices to Johnson Controls under the RMA program.
What does 'USB Malfunction' mean on my Johnson Controls Controller?
If your Johnson Controls Controller displays 'USB Malfunction', it means a USB drive has malfunctioned and drawn too much current. First, try inserting the USB drive again. If that doesn't work, try a different USB drive. If the problem persists, you might need to order replacement units and return the affected devices to Johnson Controls under the RMA program.
Why does the zone temperature change too much in unoccupied mode on my Johnson Controls Controller?
If the zone space temperature on your Johnson Controls Controller increases or decreases too much when the unit is active in unoccupied mode, it's likely that the heating and cooling equipment are too big for the unoccupied space. To fix this, decrease the Unoccupied Off Delay parameter from 10 minutes to a more suitable time for your equipment configuration.
What does 'Supply Fan Runtime Limit Extended' mean on my Johnson Controls Controller?
If your Johnson Controls Controller displays 'Supply Fan Runtime Limit Extended', it means the supply fan runtime has exceeded the configured limit. You should service the supply fan and then reset the supply fan runtime.
Guidelines for selecting the best placement for controller performance.
Step-by-step guide for physically installing the thermostat controller.
Warnings about shock hazards, property damage, and ESD during wiring.
Instructions for wiring terminals and setting the bus end-of-line switch.
Guide for using the USB port for upgrades, backups, and restoring settings.
Lists common faults, their causes, and recommended solutions.
Detailed steps to diagnose and fix specific operational problems.
General| Brand | Johnson Controls |
|---|---|
| Model | TEC3000 Series |
| Category | Thermostat |
| Language | English |
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