Features And Controls - Perkins 2506 Operation And Maintenance Manual

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Operation Section

Features and Controls

Features and Controls
Monitoring System
The engine has protection in three stages:
• Warning
• Action Alert
• Shutdown
The engine protection may be overridden by the
critical condition mode.
All alarms and shutdown faults are transmitted via
the Perkins Data Link. 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
• Inlet Manifold Air Temperature
• Inlet 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.
If a Warning Action Alert, or Shutdown output for
either the lubricating oil pressure, coolant
temperature or overspeed fault conditions, the ECM
switches on the dedicated alarm output.
If the engine is in a Warning condition and the fault
deteriorates further to the shutdown limit then the
ECM logs the fault. The ECM then shuts down the
engine. If the engine shuts down on oil pressure,
coolant temperature or overspeed the respective
alarm output will be energized.
Warning Alarm
The Warning alarm informs the user that the engine
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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
fault 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 fault code and output will remain while the
condition exists. The electronic service tool is used to
remove the fault 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.
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 or the load on the
engine is reduced. Further running of the engine may
result in an immediate shutdown.
If the engine is in the Action Alert condition, the event
will be logged in the memory of the ECM. A fault code
will be transmitted over the Perkins Data link and the
hard wired Action Alert will be energized. If the
engine is in the Action Alert condition the fault code
and output will remain while the condition exists. The
fault will remain in the memory of the ECM.
Shutdown
If the engine parameter reaches the Shutdown
condition, the following faults may occur: lubricating
oil pressure, coolant temperature or overspeed. The
event will be logged in the memory of the ECM. The
engine will be shut down. A fault 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.
Critical Protection Override
If the engine 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
during engine fault conditions.
Critical Protection Override will be set by a switch
input from the OEM. For example,this may be a
switch to battery + in order 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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