Generac 005028-0 Engine Governor Gain Adjustments, 2 - Control Board Dip Switch Location

Section 3 - Operation

Liquid-cooled 15, 20 and 25 kW Generators

Condition	System	Low	Low	High	Over		Over	Switch Position
	Ready (Green)	Bat (Red)	Oil (Red)	Temp (Red)	Speed (Red)		Crank (Red)	Manual	Auto	Off
Generator Switch is	OFF	X	OFF	OFF	OFF		OFF			O
in the OFF Mode.
System Ready for	ON	X	OFF	OFF	OFF		OFF		O
Automatic Start
Generator Switch is	OFF	X	OFF	OFF	OFF		OFF	O
in the MANUAL Mode
Weekly Exerciser	X	Flashing	Flashing	Flashing	Flashing		Flashing	O	O	O
is not set		(-----------------------------------		1 sec rate	---------------------------------------	)
Battery Voltage <12.2V	X	ON						O	O	O
for >1 minute		(Non-latching)
Battery Voltage <6V	OFF	ON						O	O
Unit Shutdown due	OFF	X	ON					O	O
to Low Oil Pressure
Unit Shutdown due to
High Coolant Temperature	OFF	X		ON				O	O
or Low Coolant Level
Unit Shutdown due	OFF	X			ON			O	O
to Engine Overspeed
Unit Failed to Start	OFF	X					ON	O	O
during it’s Crank Cycle
Utility Voltage is	Flashing	X						O	O
<45% of Nominal	1 sec rate
Engine Speed Signal Fault	OFF	X			Flashing			O	O
Control Board is	OFF	X	The five RED LED’s will turn on one at a time					O	O	O
in GTS Mode

X = indicates that the LED can be ON or OFF depending on the operating conditions.

3.3ENGINE GOVERNOR GAIN ADJUSTMENTS

Figure 3.2 — Control Board Dip Switch Location

Engine speed governing is also controlled by the engine control board. The engine governor has been set by the factory during final testing of the generator and should not be adjusted.

If, however, adjustments are necessary, the following procedure should be followed (Figure 3.2 and Section 3.7):

1.Move DIP switch 8 to the TEST mode (OFF posi- tion).

2.Set all three potentiometers (pots) fully counter- clockwise.

3.Under no load condition, increase the GAIN pot as much as possible without causing instability.

4.Apply 1/4, 1/2, 3/4 and full load to the unit. Decrease the GAIN pot if there is instability at any load point.

5.Under full load condition, increase the stability pot until the unit returns to 60 Hertz (or 50 Hertz in 50 Hertz applications).

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