Securitron TSH - Manual (Page 7)

PN# 500-17700
Page 7 Rev. C, 08/11
only the backup switch releases the door, call the factory as the defect appears to be in the relay
contacts and the sensor will have to be replaced.
PROBLEM- The door remains released constantly
If you hear a click when you touch the handle but the lock remains released, the problem is
probably in the wiring which should be reviewed to be sure the sensor is correctly applied in the
circuit. Note that you can monitor the LED which comes on when the handle senses touch if you
remove the plaque. If the LED is on constantly or if you don't hear a click when you
touch the handle, the sensor is probably adjusted too high (review section 3.6). Rotate the
adjustment pot counter-clockwise while not touching the handle. If this doesn't lock the
door, some effect is probably keeping the relay deenergized all the time (remember; the relay is
energized when the lock is secure to maintain fail safe operation).
The most likely cause for the relay to remain deenergized is that the sensor "sees" an
overwhelmingly large signal as if someone was continually touching the handle. This will happen
if the handle is not properly isolated from a metal door. Because of the plastic base, the intrinsic
isolation of the handle from the door is many times greater than it needs to be. Make sure that
there is no "foreign object" creating a conductive path from the handle to the door. An example
would be metal blinds.
The same effect will occur if the handle is used outside in the rain or if water is flowing down the
inside of the door. This overcomes the electrical isolation needed between the handle and door.
Certain large electronic noise sources can "swamp" the sensor although this is rare. Examples
would include large radio or radar transmitters in the building or a high voltage neon sign
mounted within a few feet of the door. Call the factory if you suspect noise induced problems.
Finally, in very rare instances, the sensor can “hang up” in a condition that continuously releases
the door. De-power the unit and turn the adjustment pot all the way counterclockwise. Then,
re-power the unit and note that the door locks. Then, readjust the sensor potentiometer
normally.
7. MAGNACARE
 LIFETIME REPLACEMENT WARRANTY
For warranty information visit: www.securitron.com/en/site/securitron/About/MagnaCare-Warranty/