EL Device Troubleshooting Guide

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ALLEGION EL SOLENOID ELECTRIC LATCH RETRACTION TROUBLESHOOTING GUIDE

IF DEVICE LATCH IS NOT RETRACTING PROPERLY WHEN POWERED, FOLLOW THESE STEPS IN ORDER.


1.      USE CORRECT POWER SUPPLY, OPTION BOARD, AND INPUT CONTACT

·        EL power requirements: 24VDC +/- 10%; 16 amp inrush (.3 seconds), .25 amp holding

·        Required Power Supply x Option Board: PS914 (green mother board) x 900-2RS or 900-4RL (or may use discontinued PS873)

·        Input from Access Control to be Normally Open dry contact.

·        Power supplies by others have not been tested.

2.      VERIFY CORRECT WIRE GAUGE AND DISTANCE

·        14AWG - 100 feet maximum; 12AWG - 200 feet maximum

·        Wire lengths are measured one way, between power supply and frame.

·        Wires from power supply to exit device are not polarized.

·        The above generalized values will vary slightly depending on type of device and generation of potted module used.

·        18AWG is not adequate and is the most common cause of retraction problems; if 18AWG is being used and can not be changed, the Von Duprin QEL or Falcon MEL (motorized latch retraction) kit could be used in lieu of EL for many applications.

·        Power transfer will have smaller gauge wire; this is acceptable. EPT, electrified hinges and pivots, and door loops may be used.

3.      CHECK VOLTAGE AT POWER SUPPLY

·        Verify constant 24VDC at DC output terminals on PS914 mother board.

·        With device and access control wires attached to option board per the instructions, provide input signal (e.g., card swipe) to power supply; then verify 24VDC at power supply option board output terminal.

o   If no 24VDC, jumper the input terminals on option board (as a test) to bypass possible defective input product.

o   If power supply DC light goes out and fuse resets, there may be an overload due to a short in the wiring, inadequate wire gauge, defective pulse width module (PWM), or devices being activated simultaneously (they must sequence).

4.      ELIMINATE MECHANICAL ISSUES

·        Verify that the device is not mechanically dogged or in a bind, and that latches retract and extend fully when mechanically operated.  See device instructions and videos for adjustment details.

·        If needed, disconnect device from vertical rods/cables or mortise lock to isolate mechanical from electrical issues.

5.      TEST ONE DEVICE AT A TIME

·        To isolate the source of a problem, if multiple devices are being powered, disconnect all but one device from the power source, and test each device individually. Keep in mind that if one device works fine, but another does not, power supply option board output terminals and/or pulse width modules (PWM) can be exchanged to see if symptoms follow.

6.      CHECK VOLTAGE AT SOLENOID

·        Disconnect pulse width module (PWM) from solenoid.  Current version of PWM is yellow; older version is black.

·        While providing input signal to power supply, measure voltage from PWM (LED on PWM should flash once).

·        Approximate readings for yellow module should be (do not touch meter probes):

o   Green/Yellow: 22.6VDC (older black modules should measure 0VDC after .3 seconds)

o   Green/Orange: 24VDC (older black modules should measure same)

·        If voltage reading is bad, use a different PWM (part number 050534) and/or continue metering connection points (e.g., power transfer) to determine if there is a faulty connection. 

7.      ADJUST SOLENOID PLUNGER (VON DUPRIN DEVICES ONLY).  NOTE: THIS OFTEN IMPROVES PERFORMANCE.

·        Loosen black 3/32” socket head cap screw on plunger, then turn 3/8” hex head of brass threaded bushing so 8 threads are exposed. Then test with device cover plate installed since it can impact operation. Details: Electrical Options Booklet #24228413

8.      TEST RESISTANCE OF SOLENOID WIRES.  NOTE: THE SOLENOID IS RARELY THE CAUSE OF ISSUES.

·        Green/Yellow: 1.2-2.2 ohms

·        Green/Orange:

o   Von Duprin 33A/35A/98/99:  112-130 ohms

o   Von Duprin Inpact 94/95 (EL is discontinued): 45-55 ohms

o   Falcon 24/25: 98 ohms

o   Falcon 1490/1590/1690/1790/2390: 112-130 ohms

ADDITIONAL RESOURCES AT US.ALLEGION.COM:

EL TROUBLESHOOTING VIDEO – Available Soon

VON DUPRIN EL DEVICE INSTRUCTIONS: Electrical Options Booklet, #24228413

PS914 POWER SUPPLY INSTRUCTIONS: #44487056

900-2RS OPTION BOARD INSTRUCTIONS: #24125007

900-4RL OPTION BOARD INSTRUCTIONS: #44487080



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