SEBU8337 23
Operation Section
Features and Controls
Features and Controls
i02780670
Monitoring System
The engine has protection in three stages:
•
Warning
•
Action Alert
•
Shutdown
The engine protection may be overridden by the
critical condition mode.
The Electronic Control Module (ECM) monitors the
following parameters:
•
Engine Temperatures
•
Engine Pressures
•
Engine Speed
If the parameters exceed a trip point for a period of
time that is longer than the delay period, the ECM
logs an event code and the indicator switches ON.
The following parameters are monitored for event
codes:
•
Lubricating Oil Pressure
•
Coolant Temperature
•
Overspeed
•
Intake Manifold Temperature
•
Intake Manifold Pressure
•
Fuel Temperature
The temperature protection is disabled for a period
of time when the engine is cranking in order to
compensate for heat soak solutions.
The ECM has dedicated alarm outputs for each of the
three stages of protection. There are also dedicated
alarm outputs for oil pressure, coolant temperature
and overspeed events which are energized at any
stage of protection.
Warning Alarm
The Warning ala
rm informs the user that the engine
is approaching a critical condition.
If the engine is
in the Warning condition, then the
event will be logged in the memory of the ECM.
A event code will be transmitted over the Perkins
Data link and
the hard wired Warning output will be
energized. If the engine is in the Warning condition,
the event code and output will remain while the
condition ex
ists. The electronic service tool is used to
remove the event code from the memory of the ECM.
ThetrippointfortheWarningalarmwillbesettoa
factory def
ault in production. The electronic service
toolmaybeusedtoalterthetrippointforaWarning
within predefi ned limits.
Action Alert
The Action Alert informs the OEM that the engine is
approaching a critical condition. The engine should
be stopped
in a controlled manner. Further running of
the engine may result in an immediate shutdown.
If the engi
ne is in the Action Alert condition, the event
will be logged in the memory of the ECM. A event
code will be transmitted over the Perkins Data link
and the har
d wired Action Alert will be energized. If
the engine is in the Action Alert condition the event
code and output will remain while the condition exists.
The event
code can not be cleared from the memory
of the ECM without using a factory password.
Shutdown
If the eng
ine reaches the Shutdown condition,one of
the following events has occurred: low lubricating oil
pressure, high coolant temperature or overspeed.
The even
t will be logged in the memory of the ECM.
The engine will be shut down. A event code will
be transmitted over the Perkins Data link and the
hard wir
ed Shutdown output will be energized. The
Shutdown condition will latch until the ECM is reset.
The event code for the shutdown can not be cleared
from th
e memory of the ECM without using a factory
password.
Critical Protection Override
If the e
ngine is in an application that is critical for
safety, the protection system can be overridden in
order to ensure the continuation of the power supply
durin
g engine fault conditions.
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