Kohler TP-5353 - Engine Safety Shutdown Switches

5-12 Controller Troubleshooting TP-5353 8/94
Engine Safety Shutdown
Switches
Engine Overspeed (Overspeed/
Time Delay Circuit Board)
D The overspeed relay (SDR) receives its power
when K2 normally open contact closes during
starting and running.
D The overspeed relay receives its sensing
source (frequency) from stator leads V0 and V7
at terminals 33 and 44.
D An overspeed (overfrequency of 70 Hz or
greater) at terminals 33 and 44 will cause the
SDR normally open contact to close and
energize K4 relay (LED4 lights).
D Normally closed K4 contacts open to
de-energize the ignition system (gas/gasoline)
or fuel solenoid (diesel).
D Normally open K4 contacts close to maintain a
ground connection to the K4 relay until the unit
comes to a complete stop.
D Fault lamp is energized until the generator
speed and voltage decreases enough to
de-energize K1 relay. K1 normally open
contacts open and the fault lamp turns off.
Low Oil Pressure, High Engine
Temperature, or Low Water Level
Shutdown
D Safety shutdown switch contacts close and
energize the K4 relay (LED4 lights). Note:
During cranking Time Delay Relay (TDR) relay
will cause a five second time delay before
shutdown occurs. This is allows the engine to
reach normal operating engine oil pressure.
D Normally closed K4 contacts open to
de-energize the ignition system (gas/gasoline)
or fuel solenoid (diesel).
D Normally open K4 contacts close to maintain a
ground connection to the K4 relay until the unit
comes to a complete stop.
D Fault lamp is energized until the generator
speed and voltage decreases enough to
de-energize K1 relay. K1 normally open
contacts open and the fault lamp turns off.