When multiple false code attempts (15 false attempts), the keypad indicates an error feedback during 2min and no longer takes any tries into account.
You must then wait until the end of the 2 minutes to try again. Warning, another false attempt will restart the blockage for 2min. The only way out of this loop is to enter the correct code.
If you can’t remember your code, you can reset your keypad in factory configuration via the reset button for 7s. You will then need to reset your password and pair again your equipment.