deadbolt wont lock with key from outside or turn from inside

RELATED FAQS

Question
Answer
Apartment Corridor Lock function is defined as a lock where the latch bolt operated by lever from either side, except when outside lever is made inoperative by a stop or mechanical means other than...
This change was implemented in firmware package CO.A.6 (or later) to help the customer in the communication and coupling process between the CO200 (CO250) and the hand held device (HHD). ...
The green LED is to be lit up until the spindle (Triangles and Key Switch) are aligned properly; providing a visual indication of the problem.  
If the mechanical alignment of the triangles on the back of the outside escutcheon are not aligned, the CO200 or CO250 will not connect with the SUS/HHD and will appear to be unresponsive...
In firmware CO.A.6 (or later) the Schlage button on the CO200 (CO250) will turn green anytime that the spindle triangles on the front escutcheon are out of alignment or the mechanical key switch is...
When unlocking the CO200 door by mechanical key override, the green led will be continuously ON until the key is released. This will occur after firmware CO.A.6 (or later) has been installed int...
The S51 is a tubular entrance lock with a key outside and a turn button on the inside. Function: Unlocked by key from outside when outside lever is locked by turn-button in inside lever. Inside le...
MA531 (ANSI F20) Apartment Corridor Door Lock  Latch bolt operated by knob/lever from either side, except when outside knob/lever is made inoperative by buttons in face. Dead bolt operated b...
Entry double locking—Dead bolt thrown or retracted by key in upper lock from outside or by inside turn. Deadlocking latch retracted by key in outer knob/lever when locked by pushing button in inner...
Deadbolt operated by key from outside or by turn unit from inside. Bolt automatically deadlocks when fully thrown. Latch retracted by lever from either side. Turning inside lever retracts deadbolt ...
Apartment corridor door lock - Latch bolt operated by knob/lever from either side, except when outside knob/lever is made inoperative by buttons in face. Dead bolt operated by key outside or turn i...
Entrance, double locking - Deadbolt thrown or retracted by key in upper cylinder from outside or thumbturn inside. Deadlatch is retracted by key in outside knob or by pushing turn-button in insid...
The Von Duprin 7500 mortise lock body ships in the NL mode.  Either the function of 7500 lock body has not been changed to the Classroom function or the NL Drive screw is not all the way down. Step...
  Tips for changing the function: The NL Drive screw will not be visible when lock body is set to Classroom function There is locktite on the screw that makes it seem like its turned down enou...