A periodic safety test that verifies the elevator door safety edge or light curtain correctly detects an obstruction and causes the door to reverse before applying closing force.
Full Definition
The door reversal test is a mandatory safety check required by EN 81-20 and EN 81-70 to verify that the door safety edge (contact-type) or light curtain (non-contact type) is functioning correctly. The test simulates an obstruction in the door path — typically using the standardised test cylinder specified in EN 81-20 — and verifies that the door reverses within the permitted force and distance limits. Closing force is also measured with a calibrated force gauge to confirm it does not exceed the maximum permitted value (typically 150 N average and 300 N peak for EN 81-20 installations). Failed tests indicate a faulty safety edge, misaligned light curtain, or incorrectly calibrated door controller and must be corrected before the elevator is returned to service. Results are recorded in the maintenance logbook.
