Fault Code 4153
Cummins
Overfrequency / Overspeed Protection (mild)
Generator shuts down; controller shows Fault Code 4153 – Overfrequency
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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 gain set incorrectly, Faulty throttle actuator, Speed sensor noise or misadjustment, Controller configuration error
How to Fix / Troubleshooting
Safety first: Disable automatic start. Overfrequency indicates speed control issues that can damage connected equipment.
- Speed sensor: Inspect the magnetic pickup gap to the flywheel (if adjustable) and clean metal debris from the tip. Ensure the sensor is firmly mounted.
- Actuator check: Verify the electronic governor actuator or throttle body is not sticking. Listen for abnormal buzzing or hunting.
- Controller parameters: Only qualified personnel should access and adjust governor tuning parameters in the Cummins controller. If settings were recently changed, restore factory values.
- Reset: After inspection, clear the fault and perform a no-load run to verify stable frequency before reconnecting loads.
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Repair Difficulty
Professional Required
5/5
Required Part
Engine Speed Sensor
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