Once a door defect has been located, what is the first step a driver should take?

When a door defect has been located, isolating the MCB (Miniature Circuit Breaker) is a crucial step to ensure safety before any further action is taken. This is important because it removes power from the door system, preventing any accidental activation or movement that could lead to injury or further damage during fault-finding or repairs.

Isolating the MCB creates a safe working environment, allowing the operator or technician to assess the problem without the risk of electrical hazards. This step is foundational and must be completed before resetting any devices or attempting to manually intervene with the door mechanism, such as closing it or checking indicators.

Following this, actions like resetting the door MCB or manually closing the door could lead to unnecessary risks, especially if the issue causing the defect is not fully understood or resolved. It is essential to prioritize safety and maintain control over the situation by isolating the power source first. This foundational safety protocol is a critical component of fault finding and repair processes in electrical systems.