What is the purpose of a landing door protection device?

The primary purpose of a landing door protection device is to prevent the elevator doors from opening when the elevator car is not properly aligned at a landing. This safety feature ensures that passengers cannot inadvertently enter or exit the elevator when it is not safely positioned, thereby reducing the risk of accidents or injuries from falls. By ensuring that the doors can only operate when the elevator is correctly aligned, the device plays a crucial role in maintaining the overall safety and reliability of the elevator system.

While other options outline actions related to elevator operation and safety, they do not centralize the core function of preventing unauthorized or unsafe access to the elevator. Therefore, the focus on alignment is essential for preventing potentially hazardous situations for both passengers and maintenance personnel.