When a tachograph encounters an error, it will display a combination of pictograms and a short text description of the problem. There are countless different pictograms for many different kinds of issues.
This handy Tri-Fold pocket-sized leaflet provides drivers with a quick reference to digital tachograph pictograms and what each represents. It also has a detailed explanation of a driver card printout.
This will be a driver's best friend should they encounter an error on their tachograph, aiding them get to the bottom of the issue and return to operation straight away.