Troubleshooting, Red Service LED, Green Status LED

Troubleshooting

Red Service LED

Table 9: Red LED activity

Red LED Activity

Description

	LED off continuously when power is applied to the	Normal operation.
	controller.	Normal operation.
	controller.

	LED on continuously, even when power is applied to	Someone is pressing the service button or the controller has
	the controller.	failed.

	LED flashes once every second.	Use Rover, Trane’s service tool, to restore the unit to normal
	LED flashes once every second.	operation or unconfigured.
		operation or unconfigured.

!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.

Green Status LED

The green LED normally indicates whether the controller is powered on (24 VAC).

Yellow Service LED

Table 11: Yellow LED activity

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
	LED blinks (one blink).	diagnostics present.
		diagnostics present.

	LED blinks (two blinks).	Manual output test mode (2-second hold),
	LED blinks (two blinks).	One or more diagnostics are present.
		One or more diagnostics are present.

		“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
	LED blinks (1/4 second on,	Loop Controller, a request to the controller
	1/4 second off for 10 seconds.	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.

		z Power off.
	LED off.	z Abnormal condition.
		z Test button is pressed.

Yellow LED Activity

Description

	LED off continuously.	The controller is not detecting any communication.
	LED off continuously.	(Normal for standalone applications).
		(Normal for standalone applications).

	LED blinks.	The controller detects communication. (normal for
	LED blinks.	communicating applications, including data sharing).
		communicating applications, including data sharing).

	LED on continuously.	Abnormal condition.