Trane Tracer UC400 Installation, Operation And Maintenance Manual page 37

Table 8. UC400 LEDs
LED Description
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
represents low power or a
malfunction.
Marquee LED
Shows blinking red when
an alarm or fault exists
LED not lit
TX blinks green.
RX blinks yellow.
Link and IMC
LED not lit.
Shows solid green when
the LED has been
pressed.
Service
LED not lit.
BAS-SVX48H-EN
L L E E D D D D e e s s c c r r i i p p t t i i o o n n , , A A c c t t i i v v i i t t i i e e s s , , a a n n d d T T r r o o u u b b l l e e s s h h o o o o t t i i n n g g
Indication and
Troubleshooting
Tips
Notes
Indicates normal
operation.
Indicates normal
operation.
If low power; could be
under voltage or the
microprocessor has
malfunction.
If malfunction; un-
power and then re-
power unit to bring the
unit back up to normal
When powering the UC400 and expansion module, the Marquee LED
operation.
will blink RED, blink GREEN (indicating activated and the controller/
expansion module are communicating), and then stay Green
An alarm or fault
Continuously (indicating normal power operation).
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.
Blinks at the data
transfer rate when the
unit transfers data to
other devices on the
link.
Blinks at the data
transfer rate when the
unit transfers data to
TX LED: Regardless of connectivity or not, this LED will constantly
other devices on the
blink as it continually looks for devices to communicate to.
link.
LED not lit: Determine if, for example, a Tracer SC or BACnet device
ON solid yellow;
is trying to talk to the controller or if it is capable of talking to the
indicates there is
controller. Also determine if the communication status shows down
reverse polarity.
all of the time. In addition, check polarity and baud rate.
Indicates that the
controller is not
detecting
communication.
Not lit; cycle the power
to reestablish
communication.
When the UC400 is placed into boot mode, the system will not run
any applications such as trending, scheduling, and TGP2 runtime.
Indicates controller is
The controller is placed into boot mode if the service pin is held in
operating normally.
when power is applied. In boot mode, the controller is non-
operational and is waiting for a new main application to be
downloaded.
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