I have the DSC PC2550 and found the user and installation PDF manual on line. I'm sure there's a way to do a factory reset if required. The beeping you heard was a trouble alert which you can disable. The keypad light combination tells you what the trouble is.
If you can't find the manual on line, pm me and I'll email it to you.
If you can't find the manual on line, pm me and I'll email it to you.
