AFAIK, most (home/office) security systems are not set up by the end users. Mine has an "engineer" code which is more powerful than the normal user code, and in

AFAIK, most (home/office) security systems are not set up by the end users. Mine has an "engineer" code which is more powerful than the normal user code, and in principle is not left as the default by the installer. He will in turn charge you to come round and enter it if it is ever required.