TP-6881 7/15 93Section 5 Component Testing and Adjustment
5.12 Fault Shutdown Tests
Verify the operation of the generator set overspeed,
overcrank, and low oil pressure shutdowns by
performing the following tests. If these tests are
inconclusive, test individual shutdown circuit
components (wiring harness, switch, etc.) as described
elsewhere in this section.
Hazardous voltage.
Can cause severe injury or death.
Operate the generator set only when
all guards and electrical enclosures
areinplace.
Moving parts.
WARNING
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. Do not contact electrical
connections with tools or jewelry while making adjustments or
repairs. Remove all jewelry before servicing the equipment.
Hot engine and exhaust system.
Can cause severe injury or death.
Do not work on the generator set until
it cools.
WARNING
Servicing the exhaust system. Hot parts can cause
severe injury or death. Do not touch hot engine parts. The
engine and exhaust system components become extremely
hot during operation.
5.12.1 Controller Fault Shutdown
Functions
Check the operation of the fault functions programmed
in the controller by performing the following tests. If the
controller does not operate as described, check the
controller settings. Also check the controller wiring and
connections.
Verify that the controller parameters shown in
Figure 5-20 are set correctly for your unit. For RESVL
models, select RESV.
Open the generator set output circuit breaker before
beginning the test. (See Figure 1-1 for the circuit
breaker location.)
Parameter Setting
Genset Model Number* 8RESV, 10RESV, 12RESV
Genset Serial Number* From nameplate; see Figure 3-7.
Fuel Type[
Natural Gas or
Liquid Propane (LPG)
Phase Connection[ Single Phase
Genset System Voltage[ From nameplate; see Figure 3-7.
Genset System Frequency[ 50 or 60 Hz
* In the Generator Set Information menu.
[ In the Genset System menu.
Fuel Type is available with firmware version 4.5 or higher.
Figure 5-20 Controller Settings
Overspeed Shutdown
Connect a digital voltmeter (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 to at least 115% of the rated
engine speed, 69 Hz on 60 Hz models. Verify that the
generator set shuts down on an overspeed fault. If the
overspeed shutdown does not operate, the generator
set should shut down on an overfrequency fault after
approximately 5 seconds.
Oil Pressure Low 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.
Overcrank Shutdown
Disconnect the fuel solenoid valve. Press the RUN
button on the controller. Observe that the generator set
cranks for 15 seconds and then rests for 15 seconds.
Check that the generator set shuts down after the third
crank/rest cycle.
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