Generac Power Systems 5254, 5252 Checking the Engine OIL Level, Fuses, ‹ 3.6.5 RPM Sensor Failure

Section 4 — Maintenance

Air-cooled Generators

‹3.6.5 RPM SENSOR FAILURE

During cranking, if the board does not see a valid RPM signal within three (3) seconds, it will shut down and latch out on RPM sensor loss.

During running, if the RPM signal is lost for one full second the board will shut down the engine, wait 15 seconds, then re-crank the engine.

•If an RPM signal is not detected within the first three (3) seconds of cranking, the control board will shut the engine down and latch out on RPM sensor loss.

•If the RPM signal is detected the engine will start and run normally. If the RPM signal is subsequent- ly lost again, the control board will try one more re-crank attempt before latching out and flashing the overspeed LED.

‹3.6.6 LOW BATTERY

The microprocessor will continually monitor the battery voltage and turn on the Low Battery LED if the battery voltage falls below 11.0 volts for one (1) minute. No other action is taken on a low battery condition. Low battery voltage is a non-latching alarm which will automatically clear if the battery voltage rises above 11.0 volts. Battery voltage is NOT moni- tored during the crank cycle.

4.2CHECKING THE ENGINE

OIL LEVEL

For oil capacities, see the Specifications section. For engine oil recommendations, see the Engine Oil Recommendations section. To check the engine oil level, proceed as follows (Figures 4.2, 4.3 and 4.4):

1.Move the AUTO/OFF/ MANUAL switch to the OFF position.

2.Remove the dipstick and wipe it dry with a clean cloth.

3.Completely insert the dipstick; then, remove it again. The oil level should be at the dipstick “Full” mark. If necessary, add oil to the “Full” mark only. DO NOT FILL ABOVE THE “FULL” MARK.

Never operate the engine with the oil level below the “Add” mark on the dipstick. Doing this could damage the engine.

4.Install the dipstick.

5.Reset the AUTO/OFF/MANUAL switch to its origi- nal position.

Figure 4.2 — Oil Dipstick and Fill, 7kW

4.1 FUSES

Oil Dipstick and Fill

The 15-amp fuse on the generator panel protects the DC control circuit against overload (Figure 4.1). This fuse is wired in series with the battery output lead to the panel. If this fuse element has melted open, the engine will not be able to crank or start. Replace this fuse using only an identical 15-amp replacement fuse. To replace the fuse, push the fuse holder cap down and rotate it counterclockwise. Whenever the fuse is removed or replaced, the exercise timer needs to be reset.

Figure 4.1 – Generator Control Panel

CONTROL AND INFORMATION CENTER

SYSTEM SET

LOW BATTERY

LOW OIL

AUTO. OFF MAN.

HIGH TEMP

SYSTEM FUSEOVER SPEED

NO RPM SENSE IF FLASHING

OVER CRANK

15A	SET	FLASHING GREEN LED=
		NO UTILITY SENSE
ASSY: 0F8418/0F8419	EXERCISE	5 FLASHING RED LEDS=
	TIME	EXERCISER NOT SET

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