When you apply 24 VAC power to the unit, the adapter begins a start-up sequence.
During the start-up sequence, the LCD displays a start-up text and a countdown. The buttons are not functional.
The following table shows the status of the LEDs during the start-up sequence.
| LED | Status |
|---|---|
| Power (green) | On steady if the adapter receives power |
| Fault (red) | Blink |
| Comm (green) |
On steady for approximately 10 seconds, and then blink: normal communication On steady continuously: communication lost |
After the start-up sequence finishes, the display indicates if communications have been established with subordinate controllers.
The home page of the LCD cycles through the adapter's active alarms and its current communication status. The red fault LED turns off.