Tracer Uc 400 Controller; Led Activity - Trane UniTrane Fan Coil Installation, Operation And Maintenance Manual

Table 85. Fresh air damper stays closed
Probable Cause Explanation
The controller opens and closes the fresh air damper based on the controller's occupancy mode and fan status.
Normal operation Normally, the fresh air damper is open during occupied mode when the fan is running and closed during unoccupied
mode.
The controller includes both a warmup and cooldown sequence to keep the fresh air damper closed during the
Warmup and cooldown
transition from unoccupied to occupied. This is an attempt to bring the space under control as quickly as possible.
It is possible to communicate the operating mode (such as off, heat, cool) to the controller. When off is communicated
Requested mode: off
to the controller, the unit closes the fresh air damper.
The controller includes a manual output test sequence that verifies analog and binary output operation and associated
Manual output test output wiring. However, based on the current step in the test sequence, the fresh air damper may not be open. Refer
to
A specific list of diagnostics effects fresh air damper operation. For more information, see
Diagnostic present
Troubleshooting," page
The controller must be properly configured based on the actual installed end devices and application. When the unit
Unit configuration
configuration does not match the actual end device, the damper may not work correctly.
If the controller does not have power, the fresh air damper does not operate. For the controller to operate normally,
No power to the controller a 24 Vac input voltage must be applied. When the green LED is off continuously, the controller does not have sufficient
power or has failed.
The wiring between the controller outputs and the fresh air damper must be present and correct for normal damper
Unit wiring
operation. Refer to the unit wiring diagrams on the unit.

Tracer UC 400 Controller

Diagnostics and Troubleshooting

LED Activity

There are 15 LEDs on the front of the Tracer UC400
controller. The following table provides a description of
Table 86. LED activity and troubleshooting tips for Tracer UC400 controller
LED Name Activities
Shows solid green
when the unit is
powered and no
alarm exists
Shows blinking
green during a
device reset or
firmware
download
Shows solid red
when the unit is
powered, but
Marquee LED
represents low
power or a
malfunction
Shows blinking
red when an
alarm or fault
exists
LED not lit
UNT-SVX07E-EN
"Manual Output Test," page 137.
129.
Indication and Troubleshooting Tips
Indicates normal operation
Indicates normal operation
If low power; could be under voltage or the
microprocessor has malfunction. Measure for the
expected value range. For more information, refer to
Installation, Operation, and Maintenance: Tracer
UC400 Programmable Controller (BAS-SVX20C-EN,
or the most recent version).
If malfunction; un-power and then re-power unit to
bring the unit back up to normal operation.
An alarm or fault condition will occur if the value for a
given point is invalid or outside the configured limits
for the point. Alarm and fault conditions vary, and they
can be configured by the programmer.
Indicates power is OFF or there is a malfunction
OFF or malfunction; cycle the power. For more
information, refer to Installation, Operation, and
Maintenance: Tracer UC400 Programmable Controller
(BAS-SVX20C-EN, or the most recent version).
LED activity, an indication or troubleshooting tip for each,
and any related notes.
Notes
When powering the UC400 and expansion module, the
Marquee LED will blink RED, blink GREEN (indicating
activated and controller/expansion module are
communicating), and then stay GREEN
CONTINUOSLY (indicating normal power operation).
Tracer UC 400 Controller
"Diagnostics and
143