Magnum MMG75D Operating Manual page 26

6. The Running screen will display.
Note: It may take a few seconds for the engine to run smoothly and reach its governed operating speed. The 45
second "V Detect" time delay will start to count down.
OFF MAN AUT
7. The LCD window will then toggle from the Running screen to the Generator Display screen and then to the
Engine Display screen.
8. If the engine does not start after the first cranking attempt, the engine will pause for 15 seconds to allow the
starter to cool. The LCD window will show "PAUSE". The engine will make two more attempts to start for a total
of three crank cycles.
9. Should the engine not start and run within three starting cycles, the LCD window will show "SD Start fail". The
starting sequence may be repeated after the starter has had a minimum of two minutes to cool. Press the "FAULT
RESET" button to clear the controller. To start the unit, press the green "ENGINE START" button.
Note: The engine controller may skip the preheat engine steps on some of the larger models.
10. Once the engine starts it will immediately begin speeding up to a constant 1800 rpm. The engine may hunt or
change speeds until operating speed is reached. After a few minutes of operation, the engine will be warmed
up and the LCD window will show engine and generator operating parameters. Temperature will be shown as
"0" until the engine temperature is approximately 100°F (38°C).
11. Check the generator for excessive noise or vibration and any coolant, oil, or fuel leaks before applying any loads.
12. Check that the AC output voltage is correct. The output voltage can be fine adjusted by using the fine voltage
adjustment screw (rheostat), as described on
13. Check that the frequency (Hz) is correct. With no loads connected to the generator, the frequency should read
approximately 60 Hz, depending on the type of engine governing used.
14. If all wiring connections have been made correctly, switch the main circuit breaker to the "ON/I" position and then
add any loads attached to the convenience outlets by switching the respective circuit breaker to the "ON/I"
position. You will notice a slight change in engine sound when a load is applied to the unit.
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"Fine Voltage Adjustment" on page 22.