Maintenance This is a yellow LED that flashes to indicate that a smoke detector necessitates cleansing or alternative as a consequence of an invalid chamber examining or too much drift. Website page one zero five: Alarm OperationDO w 2022 r. Allegro mo?e czerpa? z tego, co najlepsze w ka?dej z organization by przyspieszy? swoj? mi?dzynarodow? ekspa