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Electronic Governor System
The engine electronic governor system allows for improved
control and increased generator performance compared
to mechanically governed systems. The result is smooth
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many mechanical governors. The system also reduces
speed variations under engine loading and unloading and
significantly reduces frequency fluctuation experienced when
the engine is under higher loads.
The electronic governor system is composed of a stepper
motor (B), stepper motor throttle control linkages (C), and
throttle side linkage (A). The control board contains a digital
controller that processes engine speed information and
sends appropriate commands to the stepper motor to control
the position of the engine throttle.
Since the electronic governing system controls the engine
throttle demand based upon generator load, the following
service codes and/or conditions may be related to an
electronic governing system issue:
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While trouble shooting any of these conditions, a verification
of the electronic governor system can be initiated through
the control panel – advanced menu options – Electronic
Governor Check.
Electronic Governing Check:
The generator has an electronic governing check feature that
will turn on the stepper motor and move the throttle linkage
clockwise and counterclockwise within the throttle limits.
The test will rotate the stepper motor and move the throttle
arm between the wide open throttle and dead idle limits 4
times with a 2 second delay between each throttle sweep.
This will allow visual verification that the stepper motor is
functioning properly and the control linkages are connected.
The engine will not attempt to start during this test. If the
stepper motor does not move, or if a linkage binds, then
service may be required.
NOTICE If stepper motor does not move, please make sure
the stepper motor connector is attached.
A
B C