The keypad on the stairs counts as a hidden keypad and is not allowed, the one above the door is debatable. I doubt you could enter a code into it, but you sure could keypad crack it or lock pick the fading door.
Might help in the future, press f5 to take a screen shot

. Lol thanx on the screenshot tip, and the one on top, you but hop on the stairs and u can enter it easily. Buy even still, arby should have been more professional and not as rude with us...