Man D 2848 LE 401 Operating Instructions Manual page 22

D Short-term reduction of the engine speed below 800 rpm, to again achieve higher en-
gine speeds
Functional test of the check lamps
If no alarm is raised, the check lamps may be checked. Upon pressing the button
"Test", all check lamps must come on.
Self-test of system BE1
To achieve optimum operational reliability, the system distinguishes between sensor fault
and "real alarm".
The following sensors are checked for
sensor fault and parting of wire:
D Engine speed
D Engine oil pressure
D Coolant temperature
D Charge-air temperature
D Coolant level
If the signal sent by the sensor is a value
which does not occur in practice or if the
wire connection is interrupted, the check
lamp "Sensor fault" and the check lamp of
the associated function will start flashing.
Commissioning and operation
24