Error codes
21
The whole line of the progress bar lights up smoothly four times just before reading the
card.
Cause
Low battery, you can download the data.
Solution
Replace batteries / rechargeable batteries or connect the device to a tachograph or
computer.
Quick three blinks of the red LED in two-second intervals.
Cause
The battery is low, reading of the driver card is not possible.
Solution
Replace batteries / rechargeable batteries or connect the device to a tachograph or
computer.
Cause
False card type.
Solution
Insert the card correctly again. Check if it is the right card type.
