There are two types of PIN: the administrator PIN and the purchase PIN.
There is no default PIN. If the screen requires a PIN that has not been programmed, a window will appear allowing you to create one.
See how to change your PIN.
Warning: If you forget your new PIN, you will not be able to change it via your terminal. You will need to reset it and contact Technical Support.
Only the account holder or authorized users can make such a request.