Chapter 7 Troubleshooting
96 CNT-SVX05B-EN
Table 67. Outdoor air damper stays open
Probable Cause Explanation
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 “Out-
door air damper operation” on page 56 for more information.
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 outdoor air damper may be open. Refer to “Performing a manual
output test” on page 84.
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 outdoor air damper may not work correctly.
Unit wiring The wiring between the controller outputs and the outdoor air damper must be
present and correct for normal outdoor air damper operation.
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