What happens to the cabin altitude when the LDG ELEV selector is used?

When the LDG ELEV selector is used, the cabin altitude remains automatically controlled through the outflow valve. The purpose of the LDG ELEV selector is to set the target landing elevation, which informs the aircraft's cabin pressurization system of the intended elevation so that it can manage the cabin altitude appropriately during descent and landing.

By utilizing the outflow valve, the system efficiently regulates cabin pressure in response to various phases of flight. This automatic control ensures optimal cabin altitude and pressure conditions for passenger comfort and safety. The automatic system seamlessly adjusts without requiring manual intervention unless there is a specific malfunction or need for manual control, allowing pilots to focus on other critical aspects of flight management. This functionality underscores the advanced design of the A320’s environmental control system, which prioritizes efficiency and safety in cabin altitude management.