85
Practical Advice
Troubleshooting andself-test
Symbol Test Description Action if test failed
Buttons Button test
You are prompted to press all buttons one af-
ter the other from left to right – each button
must be pressed within 2 seconds of each
other, otherwise the test fails.
왘 Carefully clean dirty buttons with a damp
cloth and a mild detergent.
왘 Visit a specialist workshop for tachographs
to have the VU checked if a button repeated-
ly fails to work.
Driver card Test of the inserted driver cards
There must be a driver card in the relevant
slot. The name of the card holder is read and
displayed for 2 seconds.
왘 If a driver card is reported as defective,
check a different driver card to ensure that it
is not a fault with the VU.
왘 If the VU seems to be defective, visit a spe-
cialist workshop for tachographs to have the
equipment checked.
왘 If it is the driver card that is definitely
defective, contact the responsible authority
in the country where your driver card was is-
sued (컄 page 92).
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