Programming Guide

86 VAV-SVP01A-EN
Troubleshooting
Resetting Diagnostics
A reset clears latching diagnostics and enables the controller to try to run normally. If the latching
condition is still present after the reset, the controller shuts down. A reset resets a unit that is
running normally. There are five ways to reset unit diagnostics:
• Manual output test at the controller
• Cycling power to the controller
• BAS (communicated status request, clear alarm)
• Rover service tool (communicated status request, clear alarm)
• A communicating device able to access the controller diagnostic reset input (communicated
status request, clear alarm)
LED Operation
Red Service LED
Service Push Button
Important: If the Service button is held down for more than 15 seconds, the controller will
uninstall itself from the Comm5 network. The red service LED flashing
approximately once every two seconds indicates this mode (see Red service LED
above). Use the Rover service tool to restore the unit to normal operation. Refer the
Rover product literature for more information.
The Service push button can be used, as one of several methods, to install the controller in a
communication network. Refer to the Rover service tool product literature for more information.
Green Status LED
The green status LED is typically used to indicate whether or not the controller is powered On
(24VAC). 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 18, p. 87
shows and describes the green status LED activity.
Ta b l e 1 7. Red service LED activity
Red Service LED Activity Description
LED is Off continuously after power is applied to the
controller.
Normal operation
LED is On continuously, even when power is first applied to
the controller.
Someone is pressing the Service push button or the
controller failed.
LED flashes approximately once every two seconds.
Uninstalled (normal controller mode). Use the Rover™
service tool to restore the unit to normal operation. Refer
to the Rover product literature for more information.