Securitron TSB-3 - Manual (Page 9)

PN# 500-16400
Page 9
Rev. C, 11/07
APPENDIX A
TROUBLESHOOTING
PROBLEM- The door will not release when the bar is touched.
To monitor operation of the bar, it is quite easy to hear the relay click when the bar is touched. If you
don't hear a click, try the backup switch. If the door does not release from the backup switch, it is
almost certain that the overall wiring of the installation is at fault. If the door releases from the backup
switch, the general wiring is correct but the sensor is not reading your touch. Make sure you understand
section 3.2 on how to adjust sensitivity of the bar. It may be set too low. Another fault could be that the
sensor itself is not receiving 12-24 DC power on the red and black wires. Check the power supply and, be
sure the input polarity is correct. Also, even if power is being applied on the red and black wires, it's
possible that it's not getting into the sensor. Check the connector block that plugs into the sensor card for
loose wires. Finally, it is possible that the ring terminal that connects the sensor to the bar itself has
come loose. See Figure 6.
If you can hear this click and the door does not release, try the backup switch. If the door still doesn't
release, the problem must be in the installation wiring as it is nearly impossible to have a failed sensor
relay and backup switch at the same time. Review your wiring to make sure the sensor is correctly
applied in the circuit. If you hear the click but 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 bar 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. If you don't
hear a click, the sensor is probably adjusted too high (review section 3.2). Rotate the adjustment pot
counter-clockwise while not touching the bar. 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 energized is that the sensor "sees" an overwhelmingly large
signal as if someone was continually touching the bar. This will happen if the bar is not properly isolated
from a metal door. Because of the plastic end pieces, the intrinsic isolation of the bar 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 bar to the door. An example would be metal blinds.
The same effect will occur if the bar 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 bar 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.
IF YOUR PROBLEM PERSISTS, CALL SECURITRON: 1-800-MAG-LOCK