Owner’s Manual for Mobile Generator 33
Operation
Using the ECU Override Switch
IMPORTANT NOTE: Starting the engine with the
ECU override switch ON will not allow the engine to
shut down properly using the Engine STOP Button.
This must only be used when the engine is OFF.
See Genset Controller for location of the ECU override
switch. This toggle switch powers up the ECU without
having to start the engine. Use the ECU override switch
to turn the ECU OFF. If the unit needs to be shut down
immediately, use the emergency stop switch. See
Emergency Stop Switch.
Positive Air Shutoff (PAS) Valves
Positive air shutoff (PAS) valves are offered as an option
for the mobile diesel generators for industries that require
them for specific job sites. The PAS valve will quickly
starve the engine of air which will result in a safe and
effective emergency shutdown of the engine and
generator in the event of an engine over-speed situation.
When installed, the PAS will be automatically activated
via the generator controller logic when engine speed
exceeds 2100 rpm. When activated, the valve will receive
a signal from the controller to close and it will remain
closed for 15 seconds. A message will also appear on
the controller display "Positive Air Shutdown". This is to
inform the operator that a PAS shutdown has occurred.
When an emergency shutdown has been performed via
the PAS, the engine should be inspected prior to a restart
to verify if permanent damage or catastrophic failure has
occurred.
If the unit is equipped with a PAS, a test function has also
been incorporated into the controller to validate functional
operation of the PAS. This may be required by inspectors
on some customer job sites. The "Test" button (black) on
the control panel can be used to perform this test. In
order to perform the test, the outlined procedure can be
followed:
PAS Test Procedure
1. Make sure generator battery is connected.
2. Put Controller Power Switch in "ON" position,
Insure the engine is not running.
3. See Figure 3-11. Once the controller is at home
screen, push and hold the black "Test" (A) button
on the control panel until the message "Positive Air
Shutdown" is visible on the display. The button can
then be released.
Figure 3-11. PAS Test Button
4. At that moment, the PAS valve will actuate and
stay closed for 15 seconds. During this period, the
engine cranking feature is disabled and cannot be
started.
5. During the test sequence the visual indicator on the
end of the PAS butterfly valve assembly shaft can
be viewed for proof of functionality.
6. After the test is completed, the PAS valve will open
back up assuming the button is no longer
depressed.
7. The shutdown message will need to be cleared in
the same manner as any other shutdown. The unit
is now ready to operate.
8. You are not able to retest while in Shutdown state.
CAUTION
Equipment Damage. Do not start the engine with the
Engine Control Unit (ECU) override switch ON.
Doing so will damage the ECU.
(000305)
011196
A
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