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Table 10: Green LED activity
Green LED Activity Description
LED on continuously. Power on (normal operation).
LED blinks (one blink).
Manual output test mode (2-second hold), No
diagnostics present.
LED blinks (two blinks).
Manual output test mode (2-second hold),
One or more diagnostics are present.
LED blinks (1/4 second on,
1/4 second off for 10 seconds.
“Wink” mode.
This feature allows the identification of a
controller. By sending a request from a device,
such as Rover, Trane’s service tool or ZN510
Loop Controller, a request to the controller
can be made to “wink” a notification that the
controller received the signal. When the zone
sensor
ON button is held for 10 seconds
“Wink” mode is sent from Comfort Link
Controller.
LED off.
z
Power off.
z Abnormal condition.
z Test button is pressed.
Green Status LED
The green LED normally indicates
whether the controller is powered
on (24 VAC).
Yellow Service LED
Table 11: Yellow LED activity
Yellow LED Activity Description
LED off continuously.
The controller is not detecting any communication.
(Normal for standalone applications).
LED blinks.
The controller detects communication. (normal for
communicating applications, including data sharing).
LED on continuously. Abnormal condition.
Troubleshooting
!Warning! Service Button
The black Service button on the ZN510 board allows the user to send a service pin message, which allows
efficient identification of the unit's location. However, if the Service button is held for more than 10
seconds, the ZN510 will shut down the software application and disable the unit's operation. The only
method to restore the unit is through the use of Rover service tool. We strongly suggest that this function
only be exercised under the strict direction of factory service personnel.
Red Service LED
Table 9: Red LED activity
Red LED Activity Description
LED off continuously when power is applied to the
controller.
Normal operation.
LED on continuously, even when power is applied to
the controller.
Someone is pressing the service button or the controller has
failed.
LED flashes once every second.
Use Rover, Trane’s service tool, to restore the unit to normal
operation or unconfigured.