E22
Aksa
Overfrequency Protection
Generator shuts down; controller shows E22 Frequency High.
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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 overshoot, Incorrect speed setpoint, Faulty speed sensor, Controller frequency calibration error
How to Fix / Troubleshooting
Safety first: Isolate from load before adjusting speed or governor settings.
- Check actual frequency: Measure output frequency with a calibrated meter. Confirm it is above the nominal (50/60 Hz).
- Adjust engine speed: On mechanical governors, slightly reduce the speed adjustment screw. On electronic governors, adjust rated speed in the controller (qualified personnel only).
- Inspect speed sensor: Clean and reseat the engine speed sensor. Replace if signal is unstable.
- Verify controller settings: Ensure nominal frequency and overfrequency thresholds are correctly programmed.
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Repair Difficulty
Hard
4/5
Required Part
Governor Control Assembly
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