Otis · 400 Elevator
Indicates that one or both of the vender's door switches have been open for more than one hour. This can be caused by a physical obstruction, wiring issue, or a faulty switch, potentially leading to operational lockout.
Click steps to track your progress.
Check both the upper and lower vender door switches to see if either one is sticking or miswired.
Check the connector for the switch cable running to the VMC board.
Check to see if the harness has broken or pinched wires.
Replace the door switches if they are defective.
Repair or replace the switch harness to the VMC board.