solenoid not unlocking

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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 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 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...
The following could cause the Von Duprin CX solenoid ( devices shipped prior to 8-24-2015) to pull and drop and sound the alarm with solid LED light. Wrong power supply, requires Von Duprin ...
The following could cause the Chexit solenoid ( devices shipped prior to 8-24-2015) pulls in then drop out with no alarm. Mechanical adjustment such as vertical rods. Disconnect t...
Chexit devices shipped prior to 8-24-2015 with solenoid driven could cause the Von Duprin CX solenoid to pull and drop and sound the alarm with solid LED or no LED light after the rear...
You can't run 24VDC into the 12VDC electric strike, over voltage such as this will cause the solenoid to heat up and damage the solenoid.  You must change to a 24V solenoid, part number 050240-00.
There is potential for ND40/ND44's manufactured around March 2011 to remain locked after egress, or after the latch is depressed.  There was an issue with the keycam that created a bind when l...
The 98/99 rim and vertical rod exit devices are shipped with NL drive screw to function as a Night Latch. To convert the device to Class Room, remove the NL Drive Screw on 98/99 center case ass...
Changes to the Falcon W501 latch offering were made on 2/13/2012.   Prior to 2/13/2012: The W501 entry lock was supplied with a restoring latch which causes the button to pop and unlock...