22
CNT-SVX05A-EN
Zone sensor
Fan mode switch
The zone sensor fan mode switch provides the controller with a fan request
signal (Off, Auto). If the fan control request is communicated to the controller,
the controller ignores the hardwired fan mode switch input and uses the
communicated value.
The zone sensor fan mode switch input can be enabled or disabled through
configuration using the Rover
™
service tool. If the zone sensor switch is
disabled, the controller resorts to the
Auto
fan mode.
When the fan mode switch is placed in the Off position, the controller does not
control any unit capacity. The unit remains powered and all outputs are driven
Closed or Off.
Upon a loss of signal on the fan speed input, the controller reports a diagnostic
and reverts to using the
Auto
fan mode of operation.
On/cancel buttons
Some Trane zone sensor modules include timed override On and Cancel buttons.
Use the timed override On and Cancel buttons to place the controller in override
(occupied bypass mode) and to cancel the override request.
The controller always recognizes the timed override On button. If someone
presses the zone sensor's timed override On button, the controller initializes
the bypass timer to 120 minutes (adjustable).
If the controller is unoccupied when someone presses the On button for two
seconds, the controller immediately changes to occupied bypass mode and
remains in the mode until either the timer expires or someone presses the zone
sensor's timed override Cancel button. If the On button is pressed during
occupied bypass mode before the timer expires, the controller re-initializes the
bypass timer to 120 minutes.
If the controller is in any mode other than unoccupied when someone presses
the On button, the controller initializes the bypass time to 120 minutes. As time
expires, the bypass timer continues to decrement. During this time, if the
controller changes from its current mode to unoccupied (perhaps due to a
change based on the system's time of day schedule), the controller switches
to occupied bypass mode for the remainder of the bypass time or until
someone presses the zone sensor's timed override Cancel button.
Zone sensor communication jack
Use the RJ-11 communication jack (present on some zone sensor modules)
as the connection point from Rover service tool to the communication link, when
the communication jack is wired to the communication link at the controller.
By accessing the communication jack via Rover, you gain communication access
to any controller on the link.
Service pin message request
At any time, pressing the zone sensor On button for ten seconds,
then releasing it, causes the controller to transmit a service pin message.
The service pin message can be useful for installing the controller in a
communication network. See Trane Rover service tool literature for
more information.
