
FlexSys
Thermostat Zone Controller / LCD Touch Screen
TEC - 3620
Model:
©2016 Johnson Controls | The performance specifications are nominal and conform to acceptable industry standards. For applications at conditions beyond these specifications, consult the local
Johnson Controls office. Johnson Controls, Inc. shall not be liable for damages resulting from misapplication or misuse of its products.
© 2016 AirFixture, LLC
35
Installation / Operation Manual
V160919
TEC3000 Series On/Off or Floating Fan Coil and Zoning Thermostat Controllers with Dehumidification
Capability Installation Instructions
35
The controller displays
Cooling
or
Heating
but the staged equipment
shuts off.
When in heating or cooling mode with
staged equipment, the equipment
cycles on and off during the cooling or
heating operation in order to maintain
setpoint.
Expected behavior.
The staged equipment shuts off above
the cooling setpoint or below the
heating setpoint.
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.
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. To tighten the control band, reduce
the minimum on/off time settings.
Minimal control band is achieved
with a 60 second minimum on/off
time.
2. To loosen the control band,
increase the minimum on/off time
settings.
The controller provides an error when
trying to upgrade firmware.
The USB drive is defective.
Try a different USB drive.
The firmware package is corrupt.
Try re-downloading the firmware image
onto the USB drive and retry the
upgrade.
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.
The controller is unable to access a
USB drive.
The drive is formatted as NTFS or
another unsupported format. The TEC
supports FAT and FAT32 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.
Table 9: Troubleshooting Details
1
(Part 2 of 3)
Symptom
Probable Causes
Solutions