Which signal indicates a fault in a monitored circuit or component?

Which signal indicates a fault in a monitored circuit or component?

• A. Readiness Status
• B. A Fault in a Monitored Circuit or Component
• C. Trouble Signal
• D. A General Alarm

Answer: (C)

In fire alarm systems, signals differentiate between actual hazards and system health. A trouble signal is the one that shows a fault in a monitored circuit or component—like a detector wiring fault, a short or open on a loop, or a power supply issue. It alerts maintenance that something in the system isn’t operating correctly, without indicating an active fire condition. This is distinct from a readiness status, which merely means the system is ready or operational, and from a general alarm, which indicates an actual hazard or fire event. The phrase “trouble signal” directly names the condition of a fault in the monitored parts of the system, making it the correct choice.

In fire alarm systems, signals differentiate between actual hazards and system health. A trouble signal is the one that shows a fault in a monitored circuit or component—like a detector wiring fault, a short or open on a loop, or a power supply issue. It alerts maintenance that something in the system isn’t operating correctly, without indicating an active fire condition.

This is distinct from a readiness status, which merely means the system is ready or operational, and from a general alarm, which indicates an actual hazard or fire event. The phrase “trouble signal” directly names the condition of a fault in the monitored parts of the system, making it the correct choice.