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Displays and data
Messages, warnings and malfunctions
/ ? Service
prewarning
Message VU Next calibration, pre-warning 왘 Visit a specialist workshop for
tachographs to have the equip-
ment calibrated.
>4 1/2h Time for
break reminder
Message - - - The legally maximized contin-
uous driving time of 4½ hours
has elapsed.
왘 Stop the vehicle at the earliest op-
portunity and take a break for
45 minutes.
Timeout
no key pressed
Message VU The VU is waiting for input. 왘 Press the appropriate buttons and
complete the process.
x / Unable to
open slot
Message VU The slot concerned cannot be
opened.
왘 Check the slot for correct opera-
tion.
왘 If the slot still fails, visit a specialist
workshop for tachographs to have
the equipment checked.
! Unauth.
change of sensor
Mal-
function
Sensor The motion sensor connected
is not approved for the VU.
왘 Visit a specialist workshop for
tachographs to have the equip-
ment checked.
!UTC Time adjust
not allowed
Message VU UTC time adjustment more
than +/- 1 minute once a
week is not allowed.
왘 If the UTC time in the VU has
deviated by more than 20 minutes,
the VU must be recalibrated by a
specialist workshop for tacho-
graphs.
Display Type Unit Description Action
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