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FBII XL-21 installer code override



Hi,

I just moved into a new home with a FBII XL-21 alarm system.  Previous
owner didn't leave me any information about the code and the alarm company
that they used no longer in business.

I have tried reseting the system and was able to reset the master user
code.  However, I can't program the alarm because the default installer
code doesn't seem to be working.  Perhaps it has been changed or being
locked out using software.  Is there a way that I can override the previous
installer code or reset it?

Your help is greatly appreciated.

attica


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