Trane Tracer ZN.520 Manual page 102

100
Troubleshooting
Table 66 Outdoor air damper stays open
Probable cause Explanation
Unit wiring The wiring between the controller outputs and the outdoor air
damper must be present and correct for normal damper operation.
Unit configuration The controller must be properly configured based on the actual
installed end devices and application. When the unit configuration
does not match the actual end devices, the damper may not work
correctly.
Manual output test The controller includes a manual output test sequence you can
use to verify output operation and associated output wiring.
However, based on the current step in the test sequence, the unit
damper may be open. Refer to "Manual output test" on page 88.
Normal operation The controller opens and closes the outdoor air damper based on
the controller's occupancy mode and fan operation. Normally, the
outdoor air damper is open during occupied, occupied standby,
and occupied bypass mode when the fan is running and closed
during unoccupied mode unless the controller is economizing.
Refer to "Modulating outdoor air damper operation" on page 66
for more information.
CNT-SVX04A-EN