1st things 1st, 9930 - that's just the keypad, the system behind it is likely to be a 9651 or 9751, etc.
I assume it's now some time since this all happened, so go back & try again, should work now.
What happened is that the panel saw numerous key presses.
A 4 digit code becomes an 8 digit code becomes a 12 digit code etc = Excess keys etc.
The panel started to 'think' that someone was trying to find the code, so did what it should, locked out for a time.
If an error is made when putting in a code, step back & wait a few moments then enter again, don't panic, don't panic, they don't like too many presses up em.
acorn, July 2011