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General Information
3. Select field to adjust: Press RIGHT or LEFT, then press ENTER.
Note: Applicable fields are HOUR, MINUTE, MONTH, DAY, and YEAR.
4. Change field value: Press UP or DOWN.
5. Save field value: Press ENTER.
6. Repeat steps 3–5, as necessary.
ENGINE AND GENERATOR PROTECTIVE DEVICES
The generator set might operate for long time periods without an operator present to monitor conditions such as
coolant temperature, oil pressure, voltage, and frequency. Therefore, the generator set has numerous sensors to
provide the controller with information necessary to protect the engine and generator. The controller shuts down the
engine if potentially damaging conditions are present. Examples of damaging conditions are low oil pressure, high
coolant temperature, low coolant level, engine overspeed, over- or under-voltage, and over- or under-frequency.
Note: Controller settings are factory configured. A Generac Mobile Products Authorized Service Dealer (GMPASD)
can change controller settings.
The MGG100M leaves the factory with the controller warning set at 65 kW (five second delay) and shutdown set at
70 kW (five second delay). Our testing indicates that knocking can start to occur at loads above 70 kW. To operate
the unit above 70 kW, an adjustment must be made within the generator controller. Adjustments must be done by
an authorized owner or a GMPASD.
Note: The list below is not all-inclusive. See the H-100 Control Panel Operations Manual for more information.
Coolant Temperature Sensor
If engine coolant temperature rises to an unsafe level, the controller shuts down the engine.
Low Coolant Level Sensor
If engine coolant level drops to an unsafe level, the controller shuts down the engine.
Oil Pressure Sensor
If oil pressure drops to an unsafe level, the controller shuts down the engine.
Overspeed Shutdown
If the engine speed signal rises above a safe level, the controller shuts down the engine.
RPM Sensor Loss Shutdown
If the speed signal to the control panel is lost, the engine shuts down and then attempts to re-start until the overcrank
alarm sets.
Overcrank Shutdown
If the engine fails to start after three crank cycles, overcrank shutdown prevents further starter-cranking, as described
below.
•
The unit attempts to start three times.
•
A crank cycle lasts 30 seconds: 15 seconds cranking followed by 15 seconds rest (to cool the starter).
•
After three starting attempts, the unit shuts down.
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MGG100M Operating Manual
36833 C
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