In terms of maintenance, what is crucial for elevator door systems?

Regular inspection and adjustment are essential for elevator door systems because they ensure the doors operate safely and effectively. Over time, wear and tear can lead to misalignment or malfunction, which might compromise the safety and efficiency of the elevator. Scheduled inspections allow for the identification of any potential issues before they become serious problems, thereby reducing the risk of accidents and ensuring smooth operation. Adjustments during maintenance can also help maintain compliance with safety regulations, which are critical for passenger safety. This proactive approach to maintenance extends the lifespan of the door system and helps avoid costly repairs or replacements due to neglect.

On the other hand, cleaning the glass alone does not address the mechanical components or the system's overall functionality. Replacing the door system every two years is usually unnecessary and not cost-effective, as properly maintained systems can last much longer without needing such frequent replacement. Turning off the power is not a viable maintenance practice and would only be necessary when performing specific repairs or inspections, not as a regular maintenance procedure.