False alarms on a Siemens PSC-12M panel could be caused by various factors. One common culprit is environmental interference such as dust accumulation or electrical interference. Start by inspecting the panel and its surroundings for any signs of dirt or debris. Additionally, check for any nearby electrical devices that could be causing interference. If the issue persists, it’s advisable to consult the panel’s user manual for specific troubleshooting steps or contact a certified technician for further assistance.