What would cause an EL device to pull and release?

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 resolve your issue.

1. Check For Correct Power Supply - Verify you have the Von Duprin PS914-2RS/4RL  or  PS873-2/4TD power supply.   Power supplies by other manufacturers have NOT been tested for use with Allegion devices.
2. Check For Correct Wire Gauge - Check the gauge wire from the power supply to the door.
   
   NOTE:  All distances shown below are ONE WAY between the power supply and door.

For Product Shipped Prior to August 2012 using the old (black) potted module:

a.       0-100 ft 14 gauge wire

b.      0-200 ft 12 gauge wire

For Product Shipped After August 2012 using the PWM (clear):

       For EL 98/99 or 33A/35A Rim Devices

a.       0-500 ft 12 Gauge Wire

b.      0-300 ft 14 Gauge Wire

c.       0-200 ft 16 Gauge Wire

     For all other 98/99 or 33A/35A device types

a.       0-250 ft 12 Gauge Wire

b.      0-150 ft 14 Gauge Wire

c.       0-100 ft 16 Gauge Wire

3. Check mechanical adjustment on vertical rods - If the device has vertical rods, make sure rods are adjusted properly.  Refer to the device's installation instructions.

4. Check solenoid plunger adjustment - Verify there are 8 -10 threads shown on threaded bushing at the solenoid plunger assembly.   See Electrical Options Booklet for adjustment.

5. Check access control  input signal - Check the input activation (card reader, key pad, etc.) to the power supply and make sure input signal is activated and closed for desired time. 
While the input signal is active (closed),  check the output of the option board measures 24VDC.   You are checking the output which powers the EL device.

6. Check power supply board setting - If application is using PS914-4RL (AO Function) or PS873-AO  board:  Turn on either switch 1 or 2 to reflect a time frame instead of an LX activation. 

7. Check for defective potted module - A bad potted module could be opening the resettable thermal fuse on a PS914,  causing the fuse to reset and then open repeatedly. If you have another potted module available, such as from a difference EL device that is operating properly,  try replacing the potted module.

8. Check Wiring/loose connection - With the access control activated (closed contacts), measure the voltage across the input of the potted module,  and also across the potted module between green and orange wires.  The voltage should measure 23-24VDC.

9. Check operation with door open - Test door operation with door open to see if behavior changes.  In other words, activate the access control and see if the device unlocks properly.   If the device works properly,  then check for latch binding  - due to possible warped door or frame - when door closed.