TP-6805 8/15 111Section 6 Component Testing and Adjustment
frequency for about a minute before the Frequency Low
Shutdown is triggered.
Locked Rotor Shutdown
Remove the connector from the starter relay (see
Figure 6-38). Press RUN. Verify that the engine does
not turn and the controller indicates a Locked Rotor fault.
High Engine Temperature Shutdown
Note: Testing the high engine temperature shutdown
requires connecting a jumper wire across the
temperature sensor connections. Because the
temperature sensor can be difficult to reach, the
jumper can be placed across pins 9 and 10 on
connector P1 at the generator set controller, if
desired.
Disconnect the harness (connector P7) at the oil
temperature sensor (OTS). See Figure 6-21 for the
temperature sensor location, or see the note above.
Connect a jumper wire across the temperature sensor
connections in connector P7 or connections P1-9 and
P1-10 on the controller. See Figure 6-22. Press RUN to
start the generator set. After 5 seconds, verify that the
controller displays a high lube oil temperature fault. If
the oil temperature remains high (jumper connected)
without increasing, the generator set will run for 5
minutes in engine cooldown mode.
Press the OFF button on the controller and remove the
jumper wire. Start the generator set and verify that the
generator set does not enter the engine cooldown cycle
or shut down on a high temperature fault. Reconnect P7
to the temperature sensor.
1
GM66561
1. Temperature sensor location
Figure 6-21 Temperature Sensor (OTS) Location
GM81217
OTS
Figure 6-22 Temperature Sensor (OTS)
Connector P7
6.10.2 Fau lt Shutdow n Switches
Check the low oil pressure and high engine temperature
shutdown switches on the engine by performing the
following tests. If the sensor does not function as
described, replace it.
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.
Temperature Sensor (OTS)
The temperature sensor (labelled OTS on the wiring
diagram and schematic drawing) is used to monitor
engine temperature for the high engine temperature
fault shutdown. See Figure 6-21 for the temperature
sensor location. Press the OFF button on the controller
to stop the generator set and allow the generator set to
cool. Disconnect the temperature sensor (or see the
note, below) and use an ohmmeter to measure the
resistance across the sensor. The sensor resistance
varies with temperature and should be within the values
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