EXCITATION LOSS
Centurion Loss of Alternator Field Excitation

Generator runs but produces little or no voltage; control panel may show EXCITATION LOSS or FIELD LOSS.

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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

Failed AVR, Open rotor field winding, Broken excitation wiring, Blown field fuse on control board

How to Fix / Troubleshooting

Safety first: Turn the generator OFF and open the main breaker. Do not run the unit with no output for extended periods.

  • Check field fuse: Locate and test the field/excitation fuse on the Centurion control board. Replace only with the specified rating.
  • Inspect wiring: Check the rotor field leads from the AVR to the alternator for continuity and secure connections.
  • Test AVR: If equipped with a removable AVR, inspect for burn marks or bulging components. Replacement is often more practical than repair.

When to call a technician: A technician should perform resistance tests on the rotor and stator, verify excitation voltage, and replace the AVR or alternator components as needed.

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Repair Difficulty

Professional Required 5/5

Required Part

Alternator Rotor Field
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