VDO DTCO 4.1, Instruction Manual

Page: 147 / 172

12
Data backup by the workshop Troubleshooting
© Continental Automotive Technologies GmbH
147
Troubleshooting
■ Data backup by the
workshop
The authorised workshops can download
the data from theDTCO 4.1 and pass it
on to the company.
If the data download is not possible, the
workshops are instructed to certify this to
the contractor accordingly.
ATTENTION
Data backup
• Archive the data or carefully keep
the documentation for possible re-
quests by control bodies.
■ Overvoltage/undervoltage
Supply voltages of the DTCO 4.1 which
are too low or too high are shown in the
standard display
(a) :
12:40  45km/h
 123456.7km 
12:40 
123456.7km
Fig. 131: Display - Fault in the supply voltage
IMPORTANT
If one of the card drawers is open dur-
ing an over or undervoltage, do not in-
sert a tachograph card.
Case 1:

(1) Overvoltage
IMPORTANT
In case of overvoltage the display is
switched off and the buttons are locked.
The DTCO 4.1 continues to save activit-
ies. The functions printing or display of
data and the insertion or withdrawal of a
tachograph card are not possible.
Case 2:

(2) Low voltage
This case corresponds to a power inter-
ruption.
The standard display is shown.
The DTCO 4.1 cannot fulfil its role as a
recording equipment! The driver's activit-
ies will not be recorded.