Fire Alarm
From The Star And Shadow Cinema Wiki
If the fire alarm goes off, it is your responsibility to both make sure everyone gets out if there is a real danger, or to turn it off if its a false alarm. Things like smoke machines set it off, as does the gas hot air blower thing, if pointed to close to the heat sensors in the ceiling. If it does go off, get the key from the board behind the photocopier in the office, unlock the alarm control, down by the staff toilet, and press the bottom left 3 keys consecutively - the most bottom left one, then the next one to its right, then the next one to its right. This disarms the fire alarm.
