What do the Lights mean? Here is your quick guide to the lights and alerts: Related articles How can I set up PIN codes on the keypad? The keypad is not lit up. What do I do? I received a low battery alert. When should I change my batteries? There are two cables but the installation only asks for one to be used. What is the other cable for? The batteries have gone flat and I don’t have the spare key. How can I get in?