Adjust decks
The Adjust decks message indicates that the bottom card needs to be moved back to its start position in the hopper.

You need to clean the first sensor if the problem would persist after moving the bottom card back. c.f. the maintenance instruction.

Card path blocked
The card path blocked message indicates that a sensor in the card path is blocked.

You need to clean the sensors if the message comes up when there is no card in the card path. c.f. the maintenance instruction.