Which fault is known for causing the brakes to not release?

The EP Brakes fault is known for causing the brakes to not release because it directly pertains to the electrical and pneumatic components that control the braking system. In railway systems where electronically controlled pneumatic (ECP) brakes are utilized, any fault in the EP Brakes system can result in the brakes remaining engaged. This could be due to issues such as a failure in the control signaling, a malfunction in the brake control unit, or problems with the pneumatic pressure that should allow for the release of the brakes. Proper function of the EP Brakes is critical for safety and operational efficiency, hence identifying and resolving this fault is essential for restoring normal operation.

In contrast, a door fault typically relates to the operation of the train doors and would not impact the braking system directly. A TCU fault refers to a failure in the traction control unit, which could affect the acceleration or deceleration but does not specifically pertain to brake release issues. The Sanders fault involves sanders used to improve traction, which again does not directly correlate with the brakes being unable to release. Understanding these distinctions is vital for effective fault diagnosis and resolution in railway systems.