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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
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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