When is it considered normal for a CCTV fault light to be displayed?

The display of a CCTV fault light during system startup is a common behavior, as this is the phase when the system initializes and performs self-checks. Any initial faults that might occur due to hardware checks or connection issues can trigger a fault indicator.

However, the specific condition highlighted here—which is indicated in the provided answer—is "In Centre Motors after coupling." This scenario is significant because it is an operational state where components may come together to work cohesively after installation or coupling. If a fault light appears in this situation, it usually means that the system is monitoring for potential issues arising from the connection between the motors and other system components. Coupling might introduce momentary irregularities or misalignments that are critical to identify for proper operation.

Understanding the context of CCTV systems is crucial, as faults can arise during operation or after changes have been made. Recognizing when these faults are expected, such as after coupling, helps technicians diagnose and troubleshoot efficiently. Therefore, the visibility of a fault light during this specific phase should prompt further investigation to ensure that all systems are functioning correctly and safely.