A 4040SE would not hold the door open if it has :
No Voltage or Improper Voltage. Check that the track has proper voltage going to it (24V AC/DC or 120V AC).
If 120 volts is supplied...
If your Von Duprin EL (solenoid) device pulls and releases quickly instead of holding the latch retracted, please check all of the items below.In most cases, one or more of these solutions will r...
If a door is being held open by the LCN SEM 7800/1900 magnet or any ME/SE Series Sentronic LCN closer, you can remotely release that door to close by ordering the following parts and wi...
If mechanism cover plate causes the EL solenoid to drop when slid over the solenoid, the solenoid plunger requires adjustment. You must lengthen the rod by turning the hex nut in front of the plun...
A 4600 (4630/4640) not opening to a full 90 degrees could be caused by a couple things:
The Opening Force could be set too low. Try increasing the opening force adjustment on the controller a 1/...