I was given an HRP5-120 Processor which I'd like to use as a back up for my legacy installation here - my current processor is occasionally flakey. The only problem is I cannot unlock the panel as I do not have the panel unlock code. I have searched and cannot find a way to reset the unit to factory settings. The Installation Instructions are silent on the subject. I have an old computer and can use that to communicate with the unit on RS232 and have found a document which details the terminal commands to control it but none will reset to factory settings. Can anyone help me?