E21
Genergy
Overfrequency Fault
Generator shuts down with E21; controller indicates high frequency (Hz) condition.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Governor setpoint too high, Sticking throttle causing overspeed, Faulty electronic governor module, Incorrect frequency configuration in controller
How to Fix / Troubleshooting
Safety first: Overspeed can cause mechanical failure. Do not run the generator if RPM is unstable or excessively high.
- Verify controller settings: Confirm that the nominal frequency (50/60 Hz) is correctly set in the Genergy controller.
- Inspect throttle linkage: Check for binding or misrouted cables that hold the throttle open. Correct routing and lubricate pivots.
- Check governor module: On electronic governor systems, inspect the module and wiring for damage. Replace the module if it fails self‑tests or cannot maintain correct speed.
- Mechanical governor adjustment: On mechanical systems, adjust the governor spring tension per the Genergy service procedure to bring frequency into spec.
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Repair Difficulty
Hard
4/5
Required Part
Electronic Governor Module
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