28
SEBU8455
Operation Section
Features and Controls
Service Hour Meter –
The gauge indicates
operating hours of the engine.
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Monitoring System
If the Shutdown mode has been selected and the
warning indicator activates, engine shutdown may
take as little as 20 seconds from the time the warn-
ing indicator is activated. Depending on the ap-
plication, special precautions should be taken to
avoid personal injury. The engine can be restarted
following shutdown for emergency maneuvers, if
necessary.
NOTICE
The Engine Monitoring System is not a guarantee
against catastrophic failures. Programmed delays
and derate schedules are designed to minimize false
alarms and provide time for the operator to stop the
engine.
The following parameters are monitored:
•
Coolant temperature
•
Intake manifold air temperature
•
Intake manifold air pressure
•
Oil pressure
•
Oil temperature
•
Fuel pressure
•
Engine speed/timing
•
Fuel temperature
•
Atmospheric pressure (Barometric pressure)
•
Injection control pressure
•
Water in fuel switch
Programmable Options and
Systems Operation
If the Warning/Derate/Shutdown mode has been
selected and the warning indicator activates,
bring the engine to a stop whenever possible. De-
pending on the application, special precautions
should be taken to avoid personal injury.
The engine can be programmed to the following
modes:
“Warning”
The orange “Warning” lamp will turn “ON” and the
warning signal is activated continuously in order to
alert the operator that one or more of the engine
parameters is not within normal operating range.
“Derate”
The engine will be derated if the engine exceeds
preset operational limits. The engine derate is
achieved by restricting the amount of fuel that is
available for each injection. The amount of this
reduction of fuel is dependent on the severity of the
fault that has caused the engine derate, typically up
to a limit of 50%. This reduction in fuel results in a
predetermined reduction in engine power.
“Shutdown”
The orange warning will turn “ON” and the red
shutdown lamp will also turn “ON”.
A shutdown of the engine may occur in as little as
3 seconds. The engine can be restarted after a
shutdown for use in an emergency. However, the
cause of the initial shutdown may still exist. The
engine may shut down again in as little as 3 seconds.
For more information or assistance for repairs,
consult your Perkins distributor or your Perkins
dealer.
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Sensors and Electrical
Components
The illustrations within the section show the typical
location of the sensors. Speci
fi
c engines may appear
different from the illustration due to differences in
applications.