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Underspeed Warning
Engine speed has dropped below the minimum threshold configured in the DSE controller. This typically indicates the engine is being overloaded or is experiencing fuel delivery problems. If not corrected, it will progress to an underspeed shutdown.
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Underspeed indicates the engine cannot maintain proper RPM. This is usually caused by overloading, restricted fuel supply, or dirty air filter. Reduce load and check filters.
A 50Hz generator runs at 1500 RPM (4-pole) or 3000 RPM (2-pole). The DSE underspeed threshold is typically set 5-10% below rated speed.
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