Fault Shutdown Tests; Controller Fault Shutdown Functions - Kohler 8.5RES Service Manual

6.11 Fault Shutdown Tests

Verify the operation of the generator set overspeed,
overcrank, and low oil pressure shutdowns by
performing the following tests.
inconclusive, test individual
components (wiring harness, switch, etc.) as described
elsewhere in this section.
WARNING
Hazardous voltage.
Can cause severe injury or death.
Operate the generator set only when
all guards and electrical enclosures
are in place.
Servicing the generator set when it is operating. Exposed
moving parts can cause severe injury or death. Keep
hands, feet, hair, clothing, and test leads away from the belts
and pulleys when the generator set is running. Replace
guards, screens, and covers before operating the generator
set.
Short circuits. Hazardous voltage/current can cause
severe injury or death. Short circuits can cause bodily injury
and/or equipment damage.
connections with tools or jewelry while making adjustments or
repairs. Remove all jewelry before servicing the equipment.
6.11.1 Controller Fault Shutdown
Functions
Check the operation of the fault functions programmed
in the ADC controller by performing the following tests. If
the ADC controller does not operate as described,
check the controller configuration settings; see
Section 4.5.2. Also check the controller wiring and
connections.
Overspeed Shutdown
The overspeed setting is programmed into the ADC
controller and is not adjustable. Verify that the following
controller configuration parameters are set correctly for
your unit. See Section 4.5 and Figure 4-7 for the
settings.
System voltage/frequency parameter (UU)
D
Unit configuration parameter (UC)
D
Engine type parameter (EC)
D
D Engine data input type parameter (ED)
TP-6196 10/09
If these tests are
shutdown circuit
Moving parts.
Do not contact electrical
WARNING
Hot engine and exhaust system.
Can cause severe injury or death.
Do not work on the generator set until
it cools.
Servicing the exhaust system.
severe injury or death. Do not touch hot engine parts. The
engine and exhaust system components become extremely
hot during operation.
Open the generator set output circuit breaker before
beginning the test. (See Figure 4-1 for the circuit
breaker location.)
Connect a DVM to measure the output frequency. Start
the generator set and manually adjust the engine speed
by moving the throttle linkage.
Note: Be careful not to touch the hot silencer when
reaching in to adjust the throttle linkage.
Increase the engine speed (parameter 4P) to at least
115% of the rated engine speed, 69 Hz on 60 Hz models
or 58 Hz on 50 Hz models. Verify that the generator set
shuts down on an overspeed fault (OS).
overspeed shutdown does not operate, the generator
set should shut down on an overfrequency fault (OF)
after approximately 5 seconds.
If the controller does not indicate an overspeed fault
(OS), check the wiring to the magnetic pickup (red and
black leads, P1-17 and P1-29). Check the magnetic
pickup air gap and voltage output; see Section 6.9.4.
Low Oil Pressure (LOP) Shutdown
Connect a jumper wire from the LOP switch (lead 13) to
the generator set ground. Start the generator set. Verify
that the generator set shuts down after approximately
25--35 seconds of operation. Remove the jumper wire
from the LOP switch and ground. Start the generator set
and run it for at least 25--35 seconds to verify that the
generator set does not shut down.
Section 6 Component Testing and Adjustment
Hot parts can cause
If the
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