Trane ZN510 Controller, Tracer manual Compressors not running, Outdoor air damper stays open

Troubleshooting

Questionable Unit

Operation

Table 14: Compressor(s) not running

Probable Cause	Explanation
Normal operation.	The controller compressor(s) turn on and off to meet the unit capacity
	requirements.
	The desired operating mode (such as off, heat and cool) can be communicated to
Requested mode off.	the controller. When off is communicated to the controller, the unit shuts off all
	unit compressor(s).
	Numerous communicated requests may disable the compressor, including a
Communicated disable.	compressor enable input. Depending on the state of the communicated request,
	the unit may disable the compressor.
	The controller includes a manual output test sequence that may be used to verify
Manual output test.	output operation and associated output wiring. However, based on the current
	step in the test sequence, the compressor(s) may not be on. Refer to the manual
	output overrides on page 9.
	A specific list o f diagnostics affects compressor operation, depending whether
Diagnostic present.	the unit is configured as heat pump. For more information, see the Diagnostics
	section on page 27.
	The controller must be properly configured based on the actual installed end
Unit configuration.	devices and application. When the unit configuration does not match the actual
	end device, the compressor may not work correctly.
	If the controller does not have power, the compressor does not operate. For the
No power to the controller.	ZN510 controller to operate normally, a voltage input of 24 VAC must be applied.
	When the green LED is off continuously, the controller does not have sufficient
	power or has failed.
Unit wiring.	The wiring between the controller outputs and the compressor contacts must be
	present and correct for normal compressor operation.

Table 15: Outdoor air damper stays open

Probable Cause	Explanation
	The controller opens and closes the outdoor air damper based on the controller’s
Normal operation.	occupancy mode and fan status. Normally, the outdoor air damper is open
	during occupied mode when the fan is running and closed during unoccupied
	mode. Refer to the outdoor air damper section on page 8.
	The controller includes a manual output test sequence that may be used to verify
Manual output test.	output operation and associated output wiring. However, based on the current
	step in the test sequence, the outdoor air damper may not open. Refer to the
	manual output overrides on page 9.
	The controller must be properly configured based on the actual installed end
Unit configuration.	devices and application. When the unit configuration does not match the actual
	end device, the outdoor air damper may not work correctly.
Unit wiring.	The wiring between the controller outputs and the compressor contacts must be
	present and correct for normal damper operation.

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