
Table 16: Troubleshooting details
Symptom
Probable causes
Solutions
The Control Mode is set
to Cooling Mode, but the
controller is requesting
heating.
Change the Control Mode to Auto or
Heating.
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 Heating Mode, but the
controller is requesting
cooling.
Change the Control Mode to Auto or
Cooling.
The staged equipment
shuts off above the cooling
setpoint or below the
heating setpoint when the
PID is running on the TEC. If
the unit is in On/Off Control
mode, this does not apply.
The PID control algorithm
minimizes overshoot
and energy usage for
the particular equipment
and zone, and may cycle
the equipment prior to
reaching setpoint.
Expected behavior.
The staged equipment
cycles too rapidly or too
slowly when the PID is
running on the TEC.
The control band around
the setpoint is determined
by the minimum on/off
times and is set incorrectly
for the equipment, zone,
or user preference. There
is a tradeoff between
reduced control band size
and increased energy
usage and equipment
wear from increased
cycling.
1. Verify that equipment minimum
on/off times are set correctly.
2. If the default deadband around
the setpoint does not provide the
desired temperature control, set
Temp Control Setup to Deadband
Override and set the Deadband
parameter to the desired value.
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 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 (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.
TEC3000 Series On/Off or Floating Fan Coil Thermostats Installation Guide
58