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138 UNDERSTANDING YOUR INSTRUMENT PANEL
Heat operation:
Different operating conditions will be in effect
depending on the heat level required.
The integrated control unit adjusts the heat flow using
the following operating levels:
High – Low – Off
Safety Equipment
For safety reasons, the heater will automatically switch
off if faults occur which cause the device to overheat.
Tips for Coping with Problems; refer to "Auxiliary
Heater – Tips for Coping with Problems".
The integrated control unit contains a diagnostic
system which detects and stores faults. The error can
be read by means of the vehicle diagnosis. If a fault
occurs while the heater is switched on, the
symbol ö will flash and the error code for that fault
will be displayed in the timer.
The fault should be corrected as soon as possible by an
authorized Sprinter Dealer.
Settings with the Auxiliary Heater switched on
In preheat mode, the blower is automatically switched
on at blower speed 1 when the water heater is switched
on. When driving, the airflow control switch (2) can be
set as desired.