E10
Winco
Frequency Out of Range
Controller displays E10 / UNDERFREQUENCY or 50/60 Hz FAULT while running.
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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
Incorrect engine speed setting, Weak engine due to fuel or ignition issues, Faulty governor actuator, Defective speed sensor or controller input
How to Fix / Troubleshooting
Safety first: Disable AUTO and open the generator breaker. Frequency errors can damage sensitive electronics.
- Check for overload: Reduce connected load and see if frequency stabilizes. If frequency only drops under heavy load, the generator may be undersized or the engine underpowered.
- Inspect fuel and air: Replace the air filter, verify gas pressure, and inspect the spark plug and ignition coil for proper operation.
- Verify governor linkage: Ensure the governor linkage moves freely and is not binding. Check the return springs.
- Speed calibration: Engine speed and frequency calibration should be performed by a technician using a frequency meter and following Winco procedures.
If E10 persists after basic checks, professional adjustment of the governor and controller is recommended.
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Repair Difficulty
Hard
4/5
Required Part
Electronic Governor Actuator
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