Johnson Controls TEC3000 Series Quick Start Manual page 19

Table 8: Fault list
Faults
Dehum Unavailable
Service
Dirty Filter
Calibration Corrupt
Changeover Fail
Zone Temp Unreliable
Open Window
Fan Lock
Humidity Unreliable
Probable causes
Dehumidification is unavailable
because the zone humidity sensor has
failed or the humidity reading is not
reliable.
Equipment connected to the BI
configured for a Service alarm
triggers the alarm.
Equipment connected to the BI
configured for a Dirty Filter alarm
triggers the alarm.
Factory calibration data is lost or is
not installed.
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.
All sources of zone temperature are
unreliable, including the onboard
sensor.
The switch connected to the BI
configured for Open Window senses
that the window is opened, and
control has shut down.
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.
The zone humidity reading was
reliable and has now failed.
TEC3000 Series Proportional Fan Coil Thermostats Quick Start Guide
Solutions
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 the equipment by way of the
manufacturer's recommendation.
Replace the filter in the equipment as explained
in the manufacturer's instructions.
Order replacement units and return the
affected devices to Johnson Controls under the
RMA program.
Follow the same steps as Supply Temp Fail
alarm.
Order replacement units and return the
affected devices to Johnson Controls under the
RMA program.
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.
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.
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.
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