Magnetic encoding error.
First of all, Please press left LED button to retry.
1. The magnetic head is contaminated with the dust and dirt.
Clean the magnetic head with the cleaning kit.
2. The magnetic encoding data is not transmitted or the wrong data is transmitted.
Check the setting of the program and the driver and the magnetic encoding data
you transmitted.
3. The card is not magnetic card, or inserting direction is wrong.
Change the card or the direction.
4. Bad magnetic stripes on the card.
Change the card.