SEBU8121 23
Operation Section
Features and Controls
Features and Controls
i02259828
Monitoring System
If the Shutdown mode has been selected and the
warning indi
cator activates, engine shutdown may
take as little as 20 seconds from the time the w arn-
ing indicator is activated. Depending on the ap-
plication, s
pecial 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
•
Fuel temperature
•
Engine speed/timing
Programm a ble Options and
Systems Operation
If the Warning/Derate/Shutdown mode has been
selected and the warning indicator activates,
bring the engine to a s top 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 “Warning” lamp and the warning signal (orange
lamp) 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 ra
nge.
“Warning/Derate”
The “Diagnostic” lamp turns “ON” and the warning
signal (red lamp) is activated. After the warning, the
engine power
will be derated. The warning lamp will
begin to flash when the derating occurs.
Theenginewi
ll be derated if the engine exceeds
preset operational limits. The engine derate is
achieved by restricting the amount of fuel that is
available f
or 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 o
f 50%. This reduction in fuel results in a
predetermined reduction in engine power.
“Warning/
Derate/Shutdown”
The “Diagnostic” lamp turns “ON” and the warning
signal (re
d lamp) is activated. After the warning,
the engine power will be derated. The engine will
continue at the rpm of the set derate until a shutdown
of the engi
ne occurs. The engine can be restarted
after a shutdown for use in an emergency.
A shutdow
n of the engine may occur in as little
as 20 seconds. The engine can be restarted after
a shutdown for use in an emergency. However,
the cause
of the initial shutdown may still exist.
Theenginemayshutdownagaininaslittleas20
seconds.
If there is a signal for low oil pressure or for coolant
temperature, there will be a two second delay in
order to
verify the condition.
For each of the programmed modes, refer to
Trouble
shooting Guide, “Indicator Lamps” for more
information on Indicator Lamps.
For more
information or assistance for repairs, consult
your Perkins dealer or your Perkins distributor.
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