Please check the control panel fault log for any indications of the detector which has triggered the alarm. There are several causes of false alarms.
Consider the location and environment of the sensors, for example ensuring that the PIR’s are not located above a radiator or any other sources of heat. Always ensure the devices are firmly mounted and that the tamper springs are firmly engaged in place.
It is preferable to screw mount the door magnetic contacts, rather than simply using the sticky pads.