I have a DMC Duplex that was installed in 2002. One of the cars has a rear opening on the bottom landing. The other car is front opening only. On normal operation both cars work fine and door operation is perfect. When on phase II fire service, the car with front and rear openings will only open its door 1" and immediately closes the door when pushing the door open button. All door operation parameters and fire service parameters are set the same for both cars. Any ideas ?
