Kohler Troubleshooting Generator Errors: Locked Rotor Shutdown and More

Fault (RDC2)	Fault (OnCuer	Condition	Check
	Plus)
Frequency High	High Frequency	Governed frequency exceeds 110% of the	Contact an authorized
Shutdwn		system’s frequency setpoint for more than 10	distributor/dealer for service.
		seconds. Function becomes active 10
		seconds after engine start (10 second inhibit).
Frequency Low	Low Frequency	Governed frequency falls below 90% of the	Reduce the load by turning off
Shutdwn		system frequency setting for more than	appliances and restart the generator
		10 seconds, or 1 Hz below the system	set.
		frequency setting for more than 60 seconds.	Contact an authorized
		Function becomes active 10 seconds after	distributor/dealer for service.
		engine start (10 second inhibit).
Genset S/N	Unavailable	Generator set serial number is unavailable.	Contact an authorized
Unaval Warning	Genset Serial		distributor/dealer for service. See
	Number		section 3.11.
IAT High 1	Iat Higher	Engine manifold air temperature is too high.	Contact an authorized
Warning	Than		distributor/dealer for service and
	Expected 1		provide the fault code.
IAT Volt Hi	Iat High	The ECM reported an Engine Air	Contact an authorized
Warning	Voltage	Temperature/Manifold Absolute Pressure	distributor/dealer for service and
		Sensor (TMAP) error.	provide the fault code.
IAT Volt Lo	Iat Low	The ECM reported an Engine Air	Contact an authorized
Warning	Voltage	Temperature/Manifold Absolute Pressure	distributor/dealer for service and
		Sensor (TMAP) error.	provide the fault code.
Invalid Csum	Flash Csum	An ECM error occurred.	Contact an authorized
Warning	Invalid		distributor/dealer for service and
			provide the fault code.
Lo Crank Vlt	Low Cranking	Low cranking voltage. Battery voltage falls	Charge or replace the battery.
Warning	Voltage	below 60% of system battery voltage for more
		than 6 seconds while the starter is engaged.
Locked Rotor	Locked Rotor	No engine rotation is sensed during cranking.	Check the battery.
Shutdwn		Shuts down 3 seconds after the fault is	Check for loose connections.
		detected.
			Check for obstruction of alternator or
			engine.
			Contact an authorized
			distributor/dealer for service.
MainPwrOverL	Main Power	Main power overload. An over current fault on	Check for shorted run relay. Check
Shutdwn	Overload	the 70 controller power output (short circuit).	wiring for short circuits.
			Contact an authorized
			distributor/dealer for service.
Maint Req’d	Maintenance	Engine maintenance is due.	Check the maintenance schedule in
Warning	Required		the operation manual for tasks such
	Warning		as changing the oil, spark plugs or the
			air filter.
Not in Auto	Not In Auto	The generator set is not in Automatic	Press AUTO to place the generator
Warning		(standby) mode. Remote start and stop	set in Automatic mode, when
		commands from a transfer switch or remote	appropriate.
		switch will be ignored.
Oil Pres Low	Low Oil	The engine ECM indicates low oil pressure.	Check for leaks in the lubrication
Shutdwn	Pressure	Note: The low oil pressure shutdown does not	system.
		protect against low oil level. Check the engine	Check the oil level and add oil if the
		oil level regularly as recommended in	level is low.
		Section 4.	Check the oil pressure switch and
			wiring.

TP-6905 6/14 Section 2 Generator Set Operation 25