False alarms with the Siemens XTRI-D can be caused by a variety of factors. Firstly, ensure that all devices connected to the panel are properly installed and functioning correctly. Check for any loose connections or damaged wiring. Additionally, environmental factors such as dust or humidity can trigger false alarms. Make sure the panel and detectors are clean and free from any obstructions. If the issue persists, it may be necessary to conduct a thorough inspection of the system or consult a certified technician for further assistance.