What does BIE: PEHU indicate on the PA5 TOD trouble screen?

The BIE: PEHU indication on the PA5 TOD trouble screen signifies that the brakes are in emergency mode due to the activation of a passenger emergency handle unit. This is an important safety feature designed to ensure that passengers can alert the crew in case of an emergency, prompting an immediate response from the train's systems. The activation of this emergency handle results in the train's brakes being applied to prevent any potential harm to passengers or crew members.

A train being delayed, a fuel exhaust issue, or a power transfer failure are specific situations that indicate other problems, but they do not pertain to the BIE: PEHU code. Recognizing the meaning of this specific code is crucial for train engineers, as it directs them to take the necessary actions to address an emergency situation safely and promptly. Understanding these indications helps maintain safety and efficient operation of the train system.