A member had success by unplugging the SKREEM module, and then plugging it in again.
He also had the main battery disconnected while doing this. There is a rechargeable battery
in the siren module that will keep power in the system even when the main battery is disconnected. You need to power the SKREEM down completely.

You can download manuals to find various components.

https://www.crossfireforum.org/forum...ollection.html

I hope this will help.