Veritas 8 and continuous 10seconds beeping noise?

Hi
The alarm system is a Veratis and it keeps beeping every 10 seconds after it is unset.

Previously....
there was a power cut, then power returned.
the led light is a continuous green light on the panel
the alarm does work when it is set

The issue is when I come into the house and turn the alarm off the beeping starts.....

Is there anyone who can help me please?

Thanks

Scott