Tracer® ZN.010
and ZN.510
Table 20. Fresh Air Damper Stays Open
Probable Cause | Explanation |
Normal Operation | The controller opens and closes the fresh air damper based on the controller’s |
| occupancy mode and fan status. Normally, the fresh air damper is open during |
| occupied mode when the fan is running and closed during unoccupied mode. |
Manual Output Test | The controller includes a manual output test sequence that verifies analog and |
| binary output operation and associated wiring. However, based on the current |
| step in the test sequence, the fresh air damper may be open. Refer to the |
| “Manual Output Test” section on page 51. |
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 device, the damper may not work correctly. |
Unit Wiring | The wiring between the controller outputs and the fresh air damper must be |
| present and correct for normal damper operation. Refer to the typical unit wiring |
| diagrams in the Appendix of this manual. |
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