i08227688
Features
and
Controls
Monitoring
System
The monitoring system is designed to alert the
operator to an immediate problem.
The engine has protection in two stages:
• Warning
• Shutdown
The engine protection may be overridden by the
critical condition mode.
The Electronic Control Module (ECM) monitors the
following parameters:
• Coolant Level
• Coolant Temperature
• Engine Speed
• Engine Oil Pressure
• Fuel Temperature
• Fuel Pressure
• Intake Manifold Air Temperature
• Water In Fuel (WIF)
• Air Inlet Temperature
• Inlet Manifold Pressure
• Atmospheric pressure
If the parameters exceed a trip point for a period that
is longer than the delay period, the ECM logs an
event code. The indicator switches to the ON
position.
The following parameters are monitored for event
codes:
• Coolant Level
• Coolant Temperature
• Engine Speed
• Engine Oil Pressure
• Fuel Temperature
• Fuel Pressure
• Intake Manifold Air Temperature
• Water In Fuel (WIF)
The temperature protection is disabled for a period
when the engine is cranking 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 alarm 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. An
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 exists. The electronic service tool is used to
remove the event code from the memory of the ECM.
The trip point for the Warning alarm will be set to a
factory default in production. The electronic service
tool may be used to alter the trip point for a Warning
within predefined limits.
Shutdown
If the engine reaches the Shutdown condition, one of
the following events has occurred: low lubricating oil
pressure, low coolant level, high coolant
temperature, Clean Fuel Module (CFM) filter
restriction, or overspeed. The event will be logged in
the memory of the ECM. The engine will be shut
down. An event code will be transmitted over the
Perkins Data link and the hard wired Shutdown
output will be energized. The Shutdown condition will
latch until the ECM is reset. The event code for the
shutdown cannot be cleared from the memory of the
ECM without using a factory password.
Critical Protection Override
If the engine is in an application that is critical for
safety, the protection system can be overridden to
ensure the continuation of the power supply during
engine fault conditions.
Critical Protection Override will be set by a switch
input from the OEM. For example, switch to ground to
disable a critical override. Critical Protection Override
input can be enabled in the electronic service tool by
use of a factory password.
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