Why is the card-reader displaying 'WRONG PIN'?

If the card-reader displays the message 'WRONG PIN' it means the PIN for the card has been entered incorrectly.

You have three attempts in total to get your PIN number correct. After getting the 'WRONG PIN' message you will have two attempts left before the PIN is locked for use with the card-reader.

Make sure you're using the PIN for the card you have put into the card-reader and try again.