
TEC3000 Series Wireless Proportional Fan Coil and Individual Zone Thermostat Controllers with Dehumidification
Capability Installation Instructions
45
Table 13: Troubleshooting Details
1
(Part 1 of 2)
Symptom
Probable Causes
Solutions
The controller 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 2-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 or 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 controller
is requesting 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/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 controller is
requesting 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 controller 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 controller is requesting
heating.
Change the Control Mode to Auto or
Heating.
The Control Mode is set to Heating
Mode, but the controller is requesting
cooling.
Change the Control Mode to Auto or
Cooling.
The controller 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 2.0.2.xxxx
or higher.
A reboot is required to clear the
Firmware Mismatch fault that occurs.
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 TEC3000 zone temperature does
not change fast enough compared to
the measured zone temperature from a
verification device (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 controller provides an error when
trying to back up settings.
The USB drive is defective.
Try a different USB drive.
The controller 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.