Perkins 1106C Genset Operation And Maintenance Manual page 33

SEBU8387
Very Low Oil Pressure Warning
The very low oil pressure setpoint is dependent
upon the engine speed. If the DERATE mode of the
engine monitoring system is selected, the ECM (5)
will derate the engine power. The engine horsepower
will be limited.
Failure of the Engine Oil Pressure Sensor
The ECM (5) will detect failure of the engine oil
pressure sensor. The diagnostic lamp warns the user
about the status of the engine oil pressure sensor.
The engine oil pressure related strategies will be
disabled in the event of a failure of the engine oil
pressure sensor. A failure of the engine oil pressure
sensor will not cause a shutdown of the engine or
any horsepower change. In order to check the correct
operation of the sensor, refer to Troubleshooting, "5
Volt Sensor Supply Circuit - Test".
Primary Speed/Timing Sensor 7
If the ECM (5) does not receive a signal from the
primary speed/timing sensor , the "DIAGNOSTIC"
lamp will indicate a diagnostic fault code which will be
logged in the ECM memory.
If the ECM does not receive a signal from the primary
speed/timing sensor (7), the ECM will read the signal
from the secondary speed/timing sensor (8). The
ECM continually checks in order to determine if there
is a signal from both sensors.
Intermittent failure of the sensors will cause erratic
engine control.
Failure of the Primary Speed/Timing
Sensor
Correct operation of the primary speed/timing
sensor is essential. Software in the ECM protects
against reverse running of the engine. If the primary
speed/timing sensor fails there is no automatic
protection against reverse running. In some
applications, it is possible for the transmission to
run the engine in reverse. In this event, Stop the
engine immediately. Turn the keyswitch to the "OFF"
position.
In order to check the correct operation of the sensor,
refer to Troubleshooting, "Engine speed/Timing
sensor - Test".
Secondary Speed/Timing Sensor 8
The signal from the secondary speed/timing sensor
is used by the ECM (5) on engine start-up in order
to check the stroke of the pistons. The secondary
speed/timing sensor may be used by the ECM
in order to operate the engine if the primary
speed/timing sensor is faulty.
In order to check the correct operation of the sensor,
refer to Troubleshooting, "Engine speed/Timing
sensor-Test".
Overspeed
An overspeed condition is detected by the Electronic
Control Module (ECM). The event code will be
logged if the engine speed exceeds 3000 rpm. The
"DIAGNOSTIC" lamp will indicate a diagnostic active
code. The diagnostic active code will remain active
until the engine speed drops to 2800 rpm.
33
Operation Section
Features and Controls
i02237393