Troubleshooting - Johnson Controls - TEC3022-1x-xxx - TEC3023-1x-xxx - TEC312x-14-xxx - TEC3322-1x-xxx - TEC3323-1x-xxx - TEC3622-1x-xxx - TEC3623-1x-xxx - Proportional Fan Coil Thermostat - Thermostats - TEC3000 Series Networked and Wireless Proportional Fan Coil and Individual Zone thermostats with Dehumidification Capability

TEC3000 Series Proportional Fan Coil Thermostats Quick Start Guide
Product name
TEC3000 Series Networked and Wireless Proportional Fan Coil and Individual Zone thermostats with Dehumidification Capability
Document type
Quick Start Guide
Document revision
G
Revision date
2024-03-08
docpartnumberlabel
Part No.
Part number
24-11353-00028
Table 1. Fault list
Faults Probable causes Solutions
Remote Zone Temp Fail The External Zone Temperature sensor has been disconnected or has failed.
  1. Check the wiring of the sensor.
  2. If intentionally disconnected, reset sensors through the menu.
  3. If the problem persists, order replacement units and return the affected devices to Johnson Controls under the RMA program.
Supply Temp Fail The External Supply Temperature sensor has been disconnected or has failed.
  1. Check the wiring of the sensor.
  2. If intentionally disconnected, result fault by entering the menu, enter Control Setup, and select Inputs to reset the sensors.
  3. If the problem persists, order replacement units and return the affected devices to Johnson Controls under the RMA program.
Internal Sensor Fail An internal sensor has failed on the TEC. Order replacement units and return the affected devices to Johnson Controls under the RMA program.
Dehum Unavailable Dehumidification is unavailable because the zone humidity sensor has failed or the humidity reading is not reliable.
  1. If the source of zone humidity was a BAS, check the BAS to ensure that it is still online and is providing the TEC with the humidity reading. If removal of the BAS mapping was intentional, reset the sensors through the menu.
  2. (For all models) If the problem persists, order replacement units and return the affected devices to Johnson Controls under the RMA program.
Service Equipment connected to the BI configured for a Service alarm triggers the alarm. Service the equipment by way of the manufacturer's recommendation.
Dirty Filter Equipment connected to the BI configured for a Dirty Filter alarm triggers the alarm. Replace the filter in the equipment as explained in the manufacturer's instructions.
Calibration Corrupt Factory calibration data is lost or is not installed. Order replacement units and return the affected devices to Johnson Controls under the RMA program.
Changeover Fail The Supply Temperature Sensor is not installed, has failed, or has been disconnected and the TEC can no longer detect changeover mode to cool or heat. Follow the same steps as Supply Temp Fail alarm.
Zone Temp Unreliable All sources of zone temperature are unreliable, including the onboard sensor. Order replacement units and return the affected devices to Johnson Controls under the RMA program.
Open Window The switch connected to the BI configured for Open Window senses that the window is opened, and control has shut down.
  1. Close the window to resume control.
  2. Check sensor functionality with an ohmmeter, and verify the wiring to the TEC.
  3. Order replacement units and return the affected devices to Johnson Controls under the RMA program.
Fan Lock The switch connected to the BI configured for Fan Lock did not sense airflow within 10 seconds of starting the fan, and control has been shut down.
  1. Inspect equipment to ensure fan functions.
  2. Check sensor functionality with an ohmmeter, and verify wiring to the TEC.
  3. Reset fault by entering the menu, selecting Fault Status, and selecting the Fan Lock.
  4. Order replacement units and return the affected devices to Johnson Controls under the RMA program.
Humidity Unreliable The zone humidity reading was reliable and has now failed.
  1. If the source of zone humidity was the onboard sensor, contact Johnson Controls product sales and support.
  2. If the source of zone humidity was a BAS, check the BAS to ensure that it is still online and providing the TEC with the humidity reading. If removal of the BAS mapping was intentional, reset sensors through the menu.
Controller Fault (Thermostat Fault) The thermostat has detected an internal fault that it cannot recover. Order replacement units and return the affected devices to Johnson Controls under the RMA program.
An unknown error has prevented the thermostat from turning on. Order replacement units and return the affected devices to Johnson Controls under the RMA program.
Touchscreen Unavailable The touchscreen components fail to initialize.
  1. Reboot the thermostat.
  2. If problems persist, order replacement units and return the affected devices to Johnson Controls under the RMA program.
Board Mismatch The baseboard and CPU board are paired incorrectly. An error message appears on the TEC indicating the model number of the baseboard and CPU board. Match the baseboard to its corresponding CPU board.
Firmware Mismatch The previous upgrade did not complete.
  1. Upgrade the TEC3000 to the latest released version.
  2. Upgrade the TEC3000 to the current version again.
The previous downgrade has not completed because the previous version is no longer supported. Reboot the TEC3000 to clear the fault.
USB Malfunction A USB drive has malfunctioned and drawn more than the maximum allowed current.
  1. Attempt to insert and use the USB drive again.
  2. Try a new USB drive.
  3. If problems persist, order replacement units and return the affected devices to Johnson Controls under the RMA program.
Supply Fan Runtime Limit Extended The Supply Fan Runtime exceeds the configured Supply Fan Runtime Limit.
  1. Service the Supply Fan.
  2. Reset the Supply Fan runtime.
Heating Ineffective The Supply Air Temperature has not increased above the configured Supply Air Temperature Alarm Offset while heating has been active for at least the Supply Air Temperature Alarm Delay. Verify that the heating elements on the rooftop are functioning correctly.
Cooling Ineffective The Supply Air Temperature has not decreased below the configured Supply Air Temperature Alarm Offset while cooling has been active for at least the Supply Air Temperature Alarm Delay. Verify that the cooling elements on the rooftop are functioning correctly.
Supply Fan Fault The Supply Fan Status configured for either BI1 or BI2 has not proved within the configured Fan Alarm Delay.
  1. Verify that the Supply Fan is operating when turned on.
  2. Verify that the Supply Fan Status wiring is connected correctly.
Zone Temperature Too Cold The Zone Temperature decreased below the configured Zone Temp Low Limit. Verify that the TEC and the RTU heating are enabled and functioning.
Zone Temperature Too Hot The Zone Temperature increased above the configured Zone Temp High Limit. Verify that the TEC and the RTU cooling are enabled and functioning.
Table 2. Troubleshooting details
Symptom Probable causes Solutions
The thermostat displays Idle with a Unit Status of Cooling Unavailable due to Changeover despite being above cooling setpoint, or with a status of Heating Unavailable due to Changeover despite being below the setpoint. The two-pipe fan coil/VAV system does not have a changeover sensor and switch connected, or the sensor/switch has failed.
  1. Check the wiring of the supply temperature sensor/switch.
  2. Verify that the changeover is set up correctly for the type of sensor attached (sensor or switch).
The changeover temperature is sensing a hot supply, but the thermostat requests cooling.
  1. Verify that the supply is not in heating mode. If it is, nothing can be done from the TEC.
  2. Check the wiring of the supply temperature sensor or switch.
  3. Check the placement of the supply temperature sensor or switch.
  4. Verify that the changeover is set up correctly for the type of sensor attached (sensor or switch).
Changeover temperature is sensing a cold supply, but the thermostat requests heating.
  1. Verify that the supply is not in cooling mode. If it is, nothing can be done from the TEC.
  2. Check the wiring of the supply temperature sensor or switch.
  3. Check the placement of supply temperature sensor or switch.
  4. Verify that the changeover is set up correctly for the type of sensor attached (sensor or switch).
The thermostat displays Idle with a Unit Status of Cooling Unavailable due to Control Mode despite being above cooling setpoint, or with a status of Heating Unavailable due to Control Mode despite being below the setpoint. The Control Mode is set to Cooling Mode, but the thermostat requests heating. Change the Control Mode to Auto or Heating.
The Control Mode is set to Heating Mode, but the thermostat requests cooling. Change the Control Mode to Auto or Cooling.
The thermostat provides an error when trying to upgrade firmware. The firmware on the USB drive is below the minimum required version. Error code 1025. Please use firmware version 3.0.2.xxxx (for networked models) or 2.0.2.xxxx (for wireless models) or higher. A reboot is required to clear the Firmware Mismatch fault that occurs.
The TEC3000 zone temperature does not change fast enough compared to the measured zone temperature from a verification device, such as a calibrated sensor. The TEC3000 is configured by default for larger spaces with normal-sized equipment when a proportional device is active. Select Control Setup >Tuning > Equipment Size > Oversized.
The zone space temperature increases or decreases too much when the unit is active in unoccupied mode. The heating and cooling equipment are too big for the unoccupied space. Decrease the Unoccupied Off Delay parameter from 10 minutes to a more appropriate time for the equipment configuration.
The thermostat provides an error when trying to back up settings. The USB drive is defective. Try a different USB drive.
The thermostat provides an error when trying to restore settings from a backup. The USB drive is defective. Try a different USB drive.
The Restore file is corrupt. Try restoring a different backup file.
The Restore file is from an incompatible model TEC. Ensure that the backup file being restored was from the same model TEC.
The thermostat is unable to access a USB drive. The drive is formatted as NTFS or another unsupported format. The TEC supports file allocation table (FAT) (for networked models), FAT16 (for wireless models), and FAT32 (for all models) formats only. Reformat the USB drive, or try a different USB drive with a supported format.
The USB drive is defective. Try a different USB drive.
The thermostat displays Board Mismatch. The I/O board that the display board is currently attached to does not match the one that initially shipped with the display board. Attach the display board to the correct I/O board.
A hardware failure causes the two boards to incorrectly identify themselves. Order replacement units and return the affected devices to Johnson Controls under the RMA program.
The thermostat displays Controller Fault. An internal fault was detected and the thermostat was unable to recover. Order replacement units and return the affected devices to Johnson Controls under the RMA program.
The Bell icon is displayed on the TEC home page. The fault has been detected on the TEC. See Table 1 for TEC fault causes and resolution.
Partial Restore Complete is displayed when trying to restore settings from a backup file. Not all of the items in the backup file have been restored. This error can occur when a value is out of the minimum or maximum range in the backup file. It may also occur if there are inconsistencies in the reliability of a setting in the backup file and on the TEC device.
  1. Create a Backup file on a USB drive for the TEC that is showing the issue.
  2. Edit the backup file created in the previous step on a PC to reflect the preferred settings.
  3. Verify that the modified values are within minimum and maximum range in the backup file.
  4. Restore the settings from the newly edited backup file on the TEC.
The temperature displayed is lower than the actual room temperature. Cold air drafts enter the back of the TEC. Seal any holes behind the TEC to reduce drafts.
Air is being forced through the TEC from a nearby vent. Move the location of the TEC or change the venting to prevent air from being forced through the TEC.
For networked models, the Online icon does not appear for a networked thermostat. There is incorrect field bus wiring. Refer to the MS/TP Communications Bus Technical Bulletin (LIT-12011034).
For wireless models, Supervisory Status = Offline The supervisory controller is not communicating with the TEC. The TEC is not mapped to a Johnson Controls Supervisory System. The WNC or WRG Gateway is not communicating with the TEC.
  1. Map the TEC into a Johnson Controls Supervisory system.
  2. Verify that the PAN’s WNC or WRG Gateway is online.
  3. Add ZFR182x or ZFR183x Routers/Repeaters into the wireless system.
Some icons are hidden. Lockout levels are used or the icons are hidden due to the display settings. See Table 1 for lockout levels and access details.
The touchscreen is unresponsive. You tap the display or touch the thermostat within 5 mm of the display when power is applied to the thermostat. Reboot the thermostat. Do not interact with the thermostat until the home screen displays.
You do not tap the touchscreen, but the display acts as if it is tapped, which causes the display to blink or toggle between screens.
You need to tap the display at an offset from a touch point to activate the display.
Note: For common MS/TP troubleshooting information, refer to the MS/TP Communications Bus Technical Bulletin (LIT-12011034).