Trane Tracer VV550 User Manual

80 CNT-SVX17G-EN
Troubleshooting
Green Status LED
The green status LED is typically used to indicate whether or not the controller is powered On (24
Vac). This is the only LED under direct software control. The green status LED is Off when you press
the Test button. The green status LED blinks during manual output testing. Table 48 shows and
describes
the green status LED activity.
Table 48. Green status LED activity
Green status LED activity Description
On Power On, normal operation
Off
One of the following:
•Power Off
• Controller failure
• Test button pressed
Blinking for 10 seconds,
0.25 seconds Off; 0.25 seconds On
Wink mode
a
One blink continuously,
0.25 seconds Off; 2.25 seconds On
The controller is in the manual output
test
mode and no output-override unit
diagnostic
b
conditions
Two blinks continuously,
0.25 seconds Off; 0.25 seconds On
0.25 seconds Off; 1.75 seconds On
The controller is in the manual output
test mod
e and one or more output-
override unit diagnostic
b
conditions
exist
Yellow Comm LED
The yellow Comm5 LED blinks whenever another controller is transmitting. However, the yellow
Comm5 LED does not blink when the controller is transmitting data. The yellow Comm5 LED cannot
distinguish between messages meant for the controller and messages that the controller ignores.
Table 49 shows and describes the yellow Comm LED activity.
Table 49. Yellow Comm LED activity
Yellow Comm LED
activity
Description
LED Off continuously
The controller is not detecting communication. (Normal for stand-
alone ap
plications.)
LED blinks or flickers
The controller detects communication. (Normal for communicating
applications,
including data sharing.)
LED On continuously Abnormal condition or extremely high traffic on the link.
Manual Output Test
See “Manual Output Test,” p. 28 for a description of the manual output test and how to perform
this test step by step as reference when reading this section.
a. The wink feature enables you to identify a controller. By sending a request from the
Rover™ service tool, you can request the controller to wink.
b. See the diagnostic topic in this guide for a complete list of output override
diagnostics.

Trane Tracer VV550 Specifications

General

Brand	Trane
Model	Tracer VV550
Category	Controller
Language	English