Trane UniTrane Installation Operation & Maintenance page 82

LED Operation
Red Service LED
82
Table 31. Red Service LED Activity
LED Activity
Off continuously after
power is applied to the
controller.
On continuously, even when
power is first applied to the
controller.
LED flashes about once
every sec.
Black Service push button
Caution: If the Service push button is held down for more
than 15 seconds, the Tracer
uninstall itself from the ICS™ communication network
and shut down all unit operation. This mode is indicated
by the red Service LED flashing once every second. See
the Red Service LED section. Use Rover™ service tool to
restore the unit to normal operation. Refer to the Rover™
product literature for more information.
®
Tracer ZN.520
Description
Normal operation
Someone is pressing the Service
button or the controller has failed.
Uninstall (normal controller mode).
Use Rover™ service tool to restore
normal unit operation.
Use the Service button to install the
Tracer ® ZN.520 controller in a
communication network.
® ZN.520 controller will
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