Perkins 5006A-E23TA Operation And Maintenance Manual page 32

32
Operation Section
Sensors and Electrical Components
When the Critical Protection Override feature is
active, the ECM will continue to run the engine in all
shutdown conditions except for overspeed shutdown.
If the shutdown is overridden, an event code is
generated. The ECM will log the event code. The
ECM will energize the following: Warning, Shutdown,
Oil Pressure, Coolant Temperature, and Overspeed
outputs as normal. The warranty of the engine will be
invalidated if the engine is operated in the following
conditions: active event code and Critical Protection
Override mode.
Standard Warning Outputs
The ECM provides individual outputs to drive warning
lamps or relays to indicate each of the following fault
conditions:
• Diagnostic Fault and Warning
• Oil Pressure
• Coolant Temperature
• Overspeed
• Shutdown
If the ECM detects a warning for the coolant
temperature, the output on the coolant temperature
will be energized and the warning output will be
energized. If the ECM detects a warning for low oil
pressure, the output on the oil pressure will be
energized and the warning output will be energized.
If the engine shuts down on low oil pressure the
output on the low oil pressure will be energized and
the output on the shutdown will be energized. If the
engine shuts down on coolant temperature, or the
engine shuts down on overspeed the dedicated
output and the shutdown output will be energized.
Shutdown Reset
The cause of an engine shutdown must be
investigated. Corrective action must be taken before
the system is reset to operate the engine.
After an engine shutdown, operate the reset input of
the ECM or power down the controller.
Powering down the electronic control module can be
achieved by the operation of the keyswitch into sleep
mode. The electronic control module can be powered
down by isolating the power supply to the electronic
control module.
Note: The ECM cannot be reset by using the Reset
input until the engine has stopped.
Diagnostic
If there is a fault with an engine protection sensor on
the engine, the engine activates a diagnostic code.
The engine communicates the diagnostic code to the
operator via the Diagnostic output. The diagnostic
code provides an indication to the operator of a fault
with the engine protection system. Running of the
engine for a prolonged period in this condition may
result in engine failure. The output is generally used
to drive lamps or relays.
The following sensors are monitored to determine if
the sensors are out of the normal range, an open
circuit, or a short circuit:
• Air Inlet Temperature
• Barometric Pressure
• Lubricating Oil Pressure
• Inlet Manifold Pressure
• Inlet Manifold Temperature
• Fuel Temperature
• Fuel Pressures (Pre-primary filter if Clean Fuel
Module (CFM) is installed, Post-Primary, Pre-
Secondary, and Post-Secondary)
• Coolant Temperature
• Engine Speed
• Desired Speed Input
Sensors and Electrical
Components
(Sensors Only)
The illustrations within the following sections are
typical location of the sensors or electrical
components for an industrial engine. Specific
engines may appear different due to differences in
applications. Some items have been removed from
engine for clarity.
M0122761
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