Burgklar alarm systems are normally suppliedwith both installation and user manuals. The user manual is given to the customer and the installation amnual is kept by the installer. The user manual has instructions for operating the system and changing the user code (if the existing code is known). The installation manual has instructions for programming the system and also re-setting the system to the factory defaults. One very common enquiry regards lost codes. The installation manual will show how to reset the system to the default codes and re-programme the system.