It might happen the LED Channel Alert/Danger led is blinking (see attached video).
It not means that something is in alarm, it indicates that the Alarm Inhibit dry contact in the control module is closed :

Ref : p.23 in this manual :
https://library.vibrosystm.com/en/Manuals/9483-06M1A-240.pdfThe system will not detect any alarms on sensor signals with this configuration.