What does an air conditioning FAULT light indicate?

The air conditioning FAULT light serves as an important indicator of issues within the air conditioning system of the aircraft. When this light illuminates, it typically signifies that there is an overpressure or overtemperature condition present in the system. This situation may arise due to excessive pressure build-up from a malfunctioning component or failure to dissipate heat effectively, which is critical for the system's operation.

Understanding the implications of the FAULT light is essential for maintaining the safety and efficiency of the aircraft's cabin environment. Recognizing this alarm prompts the flight crew to take necessary actions to either resolve the issue or prepare for potential impacts on passenger comfort and safety. Addressing overpressure or overtemperature scenarios is vital, as they can lead to further complications or system failures if left unattended.