What action is required when a trouble signal is received?

When a trouble signal is received, the appropriate action is to immediately investigate the situation. A trouble signal indicates that there is a potential issue within the fire alarm system, such as a fault in wiring, a problem with a component, or low battery levels. This signal is a prompt for the responsible personnel to assess and identify the source of the trouble to ensure the system is functioning correctly and to maintain the safety of the premises.

Investigating quickly is crucial because failing to address a trouble signal can lead to undetected issues that could compromise life safety in the event of a fire. It's essential to verify the system's integrity and functionality to ensure that it can effectively respond to a real emergency.

Other actions like silencing all alarms or canceling monitoring services would not address the underlying issues that prompted the trouble signal and could jeopardize safety measures. Initiating a manual override could lead to inaction when there is a need to assess the situation. Therefore, immediate investigation is the most responsible and effective course of action when a trouble signal occurs.