What type of signal do smoke detectors provide to indicate a problem?

Smoke detectors typically provide a "trouble" signal to indicate a problem within the system. This type of signal alerts the monitoring system to potential issues, such as a malfunction or loss of power, rather than indicating an active fire condition. The trouble signal is crucial for maintenance purposes, as it informs personnel that immediate attention is needed to ensure the fire alarm system is functioning properly.

While an alarm signal indicates that smoke or heat has been detected and requires immediate action, the trouble signal specifically denotes a fault in the system. This distinction is important for maintaining operational readiness and safety within a facility.