Honeywell Le Sucre - false alarms

[Klaus]

I have a Honeywell Le Sucre system. It has been reliable for many months but has started giving false alarms. No alarm sensor is activated and no email is sent (as is the case for a genuine alarm), but the sirens on the keypads and the external bell sounds for 3 minutes. The only thing that I have noted is that after a false alarm the bottom right icon on the prox tag sensor lights up if a tag is swiped. This icon shows a thermometer and waves. I do not have a flood/temperature sensor fitted. Any ideas?     

[al-yeti]

1 hour ago, Klaus said:

I have a Honeywell Le Sucre system. It has been reliable for many months but has started giving false alarms. No alarm sensor is activated and no email is sent (as is the case for a genuine alarm), but the sirens on the keypads and the external bell sounds for 3 minutes. The only thing that I have noted is that after a false alarm the bottom right icon on the prox tag sensor lights up if a tag is swiped. This icon shows a thermometer and waves. I do not have a flood/temperature sensor fitted. Any ideas?     

Change all the batteries to start with and any backup battery