What should the car do if the firefighter's key is not in the car?

When the firefighter's key is not in the car, it is essential for the elevator system to prioritize safety and prevent unauthorized use during an emergency. In such a scenario, the correct action is for the car to not respond to commands, which ensures that the elevator cannot be operated by individuals who should not have control over it, especially during emergency situations. This feature is part of the elevator's design to protect firefighters and other emergency personnel as they use elevators safely and effectively.

By not responding to commands, the system not only protects the integrity of emergency operations but also prevents potential accidents that could occur if the elevator were to be used inappropriately during a critical time.