SDC 1576 EMLOCK - Manual (Page 5)

PROBLEM
Residual magnetism.
The lock releases slowly.
Poor holding power
No magnetic power.
Door does not lock.
BAS Option does not show
lock secure.
TROUBLE SHOOTING
1575-1576 EMLOCK
CAUSE
Control switch wired on the
AC side of the power source
Armature installed rigidly.
Insufficient voltage
AC voltage output
No power
Input polarity reversed.
Open circuit in lock coil.
Coil short.
Insufficient voltage
Armature installed rigidly or
misaligned.
Surface of magnet or armature
rusted or pitted.
SOLUTION
The access control switch must be wired on the DC side of the
power supply.
When an AC transformer and a bridge rectifier are used, the access
control switch must be wired between the rectifier and the Emlock.
The armature must pivot loosely from its center mounting point to
permit full armature contact.
Check for proper voltage at the Emlock input. If the voltage is low,
determine if the correct wire gauge is being used to prevent
excessive voltage drop.
Check the power supply load capacity. It must meet or exceed the
combined current rating of the Emlocks on the circuit.
Emlocks require DC input voltage. When an AC trans-
former is used, a bridge rectifier must be installed to convert the AC
output of the transformer to DC.
Check the input voltage at the Emlock. If the voltage is zero or a
low reading, double check all wire connections.
Note Polarity:
12VDC Config.: RED/BLU – Positive, BRN/BLK – Negative
24VDC Config.: RED – Positive, BRN – Negative
Check the Emlock coil continuity with OHM meter. If the reading is
high or open, replace the magnet.
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.
Check for proper voltage at the Emlock input. If the voltage is low,
determine if the correct wire gauge is being used to prevent
excessive voltage drop.
The armature must pivot loosely from its center mounting point to
permit full armature contact.
Clean the armature and surface of the lock (see Page 1)
P:\INSTALLATION INST\Electromagnetic Locks\INST-1575-76\INST-1575-76U.vsd REV A 01-09 Page 5