Which of the following describes the condition of a system when a Red label is applied?

A system marked with a Red label indicates that it is inoperable, impaired, or experiencing a fault. This labeling is a specific designation used in fire safety regulations to signal that the system is not functioning as intended and may pose a risk if not addressed promptly. The Red label serves as a clear warning for technicians, users, and safety personnel, indicating that immediate action is required to restore the system to full operational capability.

In contrast to the correct description, the other choices imply conditions of functionality or minor issues that do not reflect the serious status associated with a Red label. A functional and operational system would not need a Red label, as it is working correctly. Similarly, a system indicated as in need of minor repairs does not necessitate a Red label, which is reserved for more severe conditions. Lastly, a system that has recently been serviced typically would reflect a fully operational state, rather than one requiring immediate attention as indicated by the Red label.