Detex ML-1549W - Manual (Page 4)

TROUBLE SHOOTING
ML-1549W / ML-1549WF ELECTROMAGNETIC LOCK
Page 4 103163
PROBLEM CAUSE SOLUTION
Poor holding power Armature installed rigidly .
Insufficient voltage
The armature must pivot loosely form its center
mounting point to permit full armature contact
Check for proper voltage at the ElectroMagnetic lock input . If
the voltage is low, determine if the correct wire gauge is being
used to prevent excessive voltage drop .
No magnetic power.
Door does not lock.
No power Check the input voltage at the ElectroMagnetic lock . If the voltage
is zero or a low reading , double check all wire connections
Input polarity reversed .
Note polarity: 24VDC
RED = positive
BRN = negative
Blue and black wires spliced together
Open circuit in lock coil. Check the ElectroMagnetic lock coil continuity with OHM
meter. If reading is high or open , replace the magnet
Coil short.
A coil short or incorrect wiring will blow fuses. Measure the coil for
correct resistance . If the coil reading is zero or low , replace the
magnet .
If the coil resistance is correct, check the field wiring for
shorts. Locate and repair the short in the field wiring .
Available kits:
Armature weathrized hardware kit P /N 103918-3
Weatherized ElectroMagnetic lock hardware kit P /N 103918-4