Features And Controls; Alarms And Shutoffs - Perkins 1206F-E70TA Operation And Maintenance Manual

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Features and Controls

Alarms and Shutoffs

Features and Controls
Alarms and Shutoffs
Shutoffs
The shutoffs are electrically operated or mechanically
operated. The electrically operated shutoffs are
controlled by the ECM.
Shutoffs are set at critical levels for the following
items:
• Operating temperature
• Operating pressure
• Operating level
• Operating rpm
The particular shutoff may need to be reset before the
engine will start.
NOTICE
Always determine the cause of the engine shutdown.
Make necessary repairs before attempting to restart
the engine.
Be familiar with the following items:
• Types and locations of shutoff
• Conditions which cause each shutoff to function
• The resetting procedure that is required to restart
the engine
Alarms
The alarms are electrically operated. The operations
of the alarms are controlled by the ECM.
The alarm is operated by a sensor or by a switch.
When the sensor or the switch is activated, a signal is
sent to the ECM. An event code is created by the
ECM. The ECM will send a signal in order to
illuminate the lamp.
Your engine may be equipped with the following
sensors or switches:
Coolant temperature – The coolant temperature
sensor indicates high jacket water coolant
temperature.
Intake manifold air temperature – The intake
manifold air temperature sensor indicates high intake
air temperature.
Intake manifold pressure – The intake manifold
pressure sensor checks the rated pressure in the
engine manifold.
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Fuel rail pressure – The fuel rail pressure sensor
measures the high pressure or low pressure in the
fuel rail. The ECM will Check the pressure.
Engine oil pressure – The engine oil pressure
sensor indicates when oil pressure drops below rated
system pressure, at a set engine speed.
Engine overspeed – If, the engine rpm exceeds the
overspeed setting the alarm will be activated.
Air filter restriction – The switch checks the air filter
when the engine is operating.
User-defined switch – This switch can shut down
the engine remotely.
Water in fuel switch – This switch checks for water
in the primary fuel filter when the engine is operating.
Fuel temperature – The fuel temperature sensor
monitors the pressurized fuel in the high-pressure fuel
pump.
Note: The sensing element of the coolant
temperature switch must be submerged in coolant in
order to operate.
Engines may be equipped with alarms in order to
alert the operator when undesirable operating
conditions occur.
When an alarm is activated, corrective measures
must be taken before the situation becomes an emer-
gency in order to avoid possible engine damage.
If corrective measures are not taken within a
reasonable time, engine damage could result. The
alarm will continue until the condition is corrected.
The alarm may need to be reset.
Note: If installed, the coolant level switch and the oil
level switch are indicators. Both switches operate
when the application is on level ground and the
engine RPM at zero.
Clean Emission Module (CEM)
• Diesel Oxidation Catalyst
• Selective Catalyst Reduction
Soot Sensors – The soot sensors monitor the soot
level within the CEM
NOx Sensors – Two NOx sensors monitor the NOx
concentration within the exhaust gas before and after
the selective catalyst reduction module.
Temperature Sensors – A temperature sensor after
the engine exhaust gas exit, after the DOC and
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NOTICE
(DOC)
(SCR)