Johnson Controls TEC-3620 - Troubleshooting; Fault List and Probable Causes

FlexSys Thermostat Zone Controller / LCD Touch Screen
TEC - 3620
Model:
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Installation / Operation Manual
V160919
TEC3000 Series On/Off or Floating Fan Coil and Zoning Thermostat Controllers with Dehumidification
Capability Installation Instructions
Troubleshooting
Table 8: Fault List (Part 1 of 2)
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, contact Johnson
Controls product sales and support.
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, reset sensors
through the menu.
3. If the problem persists, contact Johnson
Controls product sales and support.
Internal Sensor Fail An internal sensor has failed on the
TEC.
Contact Johnson Controls product sales and
support.
Dehum Unavailable Dehumidification is unavailable
because the zone humidity sensor has
failed.
Replace the thermostat controller.
Service Equipment connected to the BI
configured for a Service alarm is
triggering the alarm.
Service the equipment per the manufacturer's
recommendation.
Dirty Filter Equipment connected to the BI
configured for a Dirty Filter alarm is
triggering the alarm.
Replace the filter in the equipment per the
manufacturer's instructions.
Calibration Corrupt Factory calibration data is lost or is not
installed.
Contact Johnson Controls product sales and
support.
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.
Contact Johnson Controls product sales and
support
Open Window The switch connected to the BI
configured for Open Window is sensing
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. Contact Johnson Controls product sales and
support if the fault continues to occur.
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. If problems persist, contact Johnson Controls
product sales and support.
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.