What is an "unknown alarm" in fire alarm systems?

An "unknown alarm" in fire alarm systems refers to an alarm whose cause has not been identified. This situation typically arises when the fire alarm system indicates a potential emergency, but the specific reason for the activation—such as the presence of smoke, fire, or another triggering condition—has not been determined. Unknown alarms require immediate investigation to rule out potential dangers and ensure the safety of occupants.

Understanding this concept is crucial because it highlights the importance of thorough inspections and prompt responses to alarms. This categorization helps fire safety professionals prioritize their investigations and can impact how they handle the situation until the cause is established.