Detector 1 fire alarm state changed, Detector 1 action alarm state changed, Detector 1 alert alarm state changed, Detector 2 fire alarm state changed, Detector 2 action alarm state changed, Detector 2 alert alarm state changed, Failure display state changed, Detector 1 air flow initialization state changed, Detector 2 air flow initialization state changed, Detector 1 stored messages changed, Detector 2 stored messages changed, Unit mainboard stored messages changed,