11
Troubleshooting
Data backup by the workshop
136
Operating instructions DTCO 4.0 - Edition 11.2018 - A2C19916900
Troubleshooting
■ Data backup by the
workshop
The authorised workshops can download
the data from the DTCO 4.0 and hand it
over to the company.
If a download of the data is not possible,
the workshops are instructed to certify
this to the contractor.
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 4.0 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. 128:
Display - malfunction 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 4.0 continues to save any
activities. The functions print or display
of data as well as the insertion of re-
moval of tachograph cards are not pos-
sible.
Case 2:
(2) Undervoltage
This case corresponds to a power inter-
ruption.
The standard display is shown.
The DTCO 4.0 cannot fulfil its task as a
control device. The driver's activities will
not be recorded.
► Power interruption
xx.xx.xx.
SWUM xx.xx
! power
interruption xx
Fig. 129:
Display - Voltage interruption
Service Only!
