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Home›Repair guides›Over Speed (Shutdown Alarm)

Generac 20kW — Over Speed (Shutdown Alarm)

For the Generac 20kW.

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Procedure

  1. 4320 RPM for three (3) seconds or 4500 RPM immediately. This
  2. 15 seconds, then re-crank the engine. If no RPM signal is detected
  3. 30 seconds it will shut down. The under-frequency setting is 50
  4. 0.2 seconds, an alarm will be issued and the unit will shut down.
  5. 3.6.2

Source: manual:9f84685f-0bec-42e0-a4e9-5c2c50b4b67b.pdf. Figures and steps are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.