What happens when the fire alarm goes on?
If this or not, then you look at emergency evacuation lights, test button is not touched, and then click on it, the emergency light is the main power failure caused by the lack of electricity before returning.
Silence, and then look at the host device alarm address, compared to the site to find the address device, check the reasons, such as hand newspaper, lower, reset, and then to the host, click Reset
