Troubleshooting guide

lock to lock. Some have opened right up with a slow speed setting and others at a much faster
speed.
4. The hammer drill works even better if you remove the dial (Appendix C) and apply the
vibrations to the hardplate. To get directly to the hardplate after removing the dial, drill a ¼
inch hole through the dial ring assembly and the drawer head skin. DO NOT DRILL INTO
THE HARDPLATE! The position of the ¼ inch hole should be about 1 ½ inches down and
1 inch to the right of the spindle hole. This should place you close to the stepper motor.
5. If a hammer drill is not available and entry is urgent, try using a center punch with a light-
weight hammer. Tap the center punch as someone else is turning the dial to the right.
NOTE: Do not engage in either long enough to allow the lock to power down
before turning the dial to the right. You must have enough power on the
lock to fire the stepper motor to get the container open.
“OP” WILL NOT GO OUT WHEN DIALED TO LEFT
If the microprocessor does not turn off “OP” when the dial is turned back to the left, it is highly
probable the microprocessor did not receive a signal from the reed switch that indicates cam
position. After the processor displays “OP” it will go into a program loop waiting for the reed
switch to make. If the processor never sees the reed switch go active it will remain in a loop until
the lock powers off.
POSSIBLE CAUSES
1. Reed switch
2. Cam magnet
3. Back cover (electronic card)
REED SWITCH
The fact “OP” did not go off indicates that the processor did not read the cam position signal.
This also indicates that the reed switch and/or magnet may be marginal or defective. Since both
components have a very low failure rate, the probability that one is marginal is the basis for our
approach to this problem.
1. Setup, dial combination stopping on the last digit.
2. Bias the dial outwardly to move the magnet closer to the reed switch. To accomplish this,
grip the dial knob with vise grips and pull toward the front of the container while turning the
dial to the right. With luck, “OP” will be displayed; the reed switch will make; the bolt will be
retracted and the container can be opened.
3. If the above does not work, we recommend the dial be removed following instructions in