There are several different signals on the smoke sensors. The most common are flashing lights on the ring around the button.
|Short flash: Sending signal. This means that it sends a message to the central. This is completely normal and will happen several times a day.|
|Rapid flash: Alarm signal.|
|Flashes every second: Silent alarm.|
|Flashes every 2 seconds: During warm-up and calibration.|
|Flashes every second: Calibration failed.|
|Flashes every 5 seconds: Self-diagnosis failed.|
|Flashes every 45 seconds: Low battery.|
Flashes every 4 seconds: Critical low battery, replace immediately.