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

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

• A. Supervisory Signal
• B. General Alarm
• C. Trouble Signal
• D. Fire Alarm Control Panel

Answer: (C)

Signals in a fire alarm system convey different statuses of the system. A trouble signal is used to alert that a fault or malfunction exists in the system itself—such as power loss, a communication line fault, or a device/wiring fault—that requires maintenance. It does not indicate a fire or an evacuation event, just that something in the system isn’t operating correctly and needs service. In contrast, a supervisory signal indicates a monitored device or circuit is not in its normal state (like a valve or other protected device not in the expected position), a general alarm signals an actual alarm for occupants, and the Fire Alarm Control Panel is the central controller, not a type of signal. So the signal that points to a fault in a monitored circuit or component is the trouble signal.

Signals in a fire alarm system convey different statuses of the system. A trouble signal is used to alert that a fault or malfunction exists in the system itself—such as power loss, a communication line fault, or a device/wiring fault—that requires maintenance. It does not indicate a fire or an evacuation event, just that something in the system isn’t operating correctly and needs service.

In contrast, a supervisory signal indicates a monitored device or circuit is not in its normal state (like a valve or other protected device not in the expected position), a general alarm signals an actual alarm for occupants, and the Fire Alarm Control Panel is the central controller, not a type of signal.

So the signal that points to a fault in a monitored circuit or component is the trouble signal.