How do I lock the dispenser and control panel, and how do I use the door alarm?

Press and hold the ALARM/LOCK button for 3 seconds to lock the dispenser and all control panel functions; press and hold again for 3 seconds to unlock. The door alarm will sound three times at 30-second intervals when a compartment door has been left open for more than 60 seconds, and will stop when the door is closed. Press the ALARM/LOCK button once to activate or deactivate the door alarm function. (Page 14)