Having an issue lately with my Whelen HHS2200. When running code, with everything on, while switching between siren tones, I hit the Air Horn (momentary) and it seemed as though it stayed on slightly longer than I depressed it, and then immediately after, everything turned off. Every lighting output, even the backlight on the remote. Everything remained off, until I hit another button on the remote. That caused the backlight to come back on and for everything to begin acting normal again. This has happened on a couple occasions.