Tracer UC 400 Controller
144
UNT-SVX07E-EN
Overriding Outputs
Analog and multistate value request points are included in
order to safely override outputs without disrupting TGP2
program operation. To override valves and dampers for
commissioning or testing purposes, access the following
points on the Tracer TU analog or multistate status pages:
•
Cool valve request
•
DX cool request
•
Heat valve request
•
Electric heat request
•
Economizer request
•
Supply fan speed active
For more information, refer to: BAS-SVX20C-EN
Installation, Operation, and Maintenance: Tracer UC400
Programmable Controller
Diagnostics
Diagnostics are informational messages that indicate the
operational status of the controller. In response to most
diagnostics, the controller attempts to protect the
equipment by enabling/disabling, or by opening/closing
specific outputs. Other diagnostics provide information
about the status of the controller, but have no effect on
outputs. Diagnostics are reported in the order in which
they occur. Multiple diagnostics can be present
simultaneously. Diagnostic messages are viewed using
the Tracer TU service tool or through a BAS.
Note:
Tracer TU will report only active diagnostics.
Diagnostics Types
Diagnostics are categorized according to the type of
clearing method each uses and the type of information
each provides.
The diagnostic types are:
•
Manual (latching) diagnostics
•
Automatic (non-latching) diagnostics
•
Smart reset diagnostics
•
Informational diagnostics
Note:
Clearing diagnostics refers to deleting diagnostics
from the software; it does not affect the problem
that generated the message.
Link and IMC
TX blinks green
Blinks at the data transfer rate when the unit transfers
data to other devices on the link
TX LED: Regardless of connectivity or not, this LED will
constantly blink as it continually looks for devices to
communicate to.
LED not lit:
Determine if, for example, a Tracer SC or BACnet
device is trying to talk to the controller or if it is
capable of talking to the controller. Also determine if
the communication status shows down all of the time.
In addition, check polarity and baud rate.
For more information, refer to
Installation, Operation,
and Maintenance: Tracer UC400 Programmable
Controller
(BAS-SVX20C-EN, or the most recent
version).
RX blinks yellow
Blinks at the data transfer rate when the unit receives
data from other devices on the link
ON solid yellow
; indicates there is reverse polarity
LED is not lit
Indicates that the controller is not detecting
communication
Not lit
; cycle the power to reestablish communication
Service
Shows solid green
when the LED has
been pressed
When the UC400 is placed into boot mode, the system
will not run any applications such as trending,
scheduling, and TGP2 runtime. The controller will be
placed into boot mode if the service pin is held in when
power is applied. In boot mode, the controller is non-
operational and is waiting for a new main application
to be downloaded.
LED not lit
Indicates controller is operating normally
Binary B01
through B09
Shows solid
yellow
Indicates a corresponding binary output has been
commanded
ON
Relay coil
; indicates that a command has been made
to energize
TRIAC
; indicates that a command has been made to
turn ON
If the user is currently powering the UC400 from a USB
port, the Led lights will turn
ON
. However, the binary
outputs
will
not
be activated.
Commanded ON
; As an example of commanded ON,
a command could be a manual command such as an
override or a command could be from TGP2 based on
a list of conditions that are met telling these outputs
to turn ON.
LED not lit:
Did the user command it to be ON? If yes, see the
Marquee LED at the top of this table. For more
information, refer to
Installation, Operation, and
Maintenance: Tracer UC400 Programmable Controller
(BAS-SVX20C-EN, or the most recent version).
LED not lit
Indicates that a relay output is de-energized or no
power to the board
Not lit
; cycle power to reestablish communication
Table 86. LED activity and troubleshooting tips for Tracer UC400 controller (continued)
LED Name
Activities
Indication and Troubleshooting Tips
Notes
