Generator runs but shuts down with OVER VOLTAGE fault; lights in the home may briefly brighten during transfer.

Safety first: Place the generator in OFF and open the main line circuit breaker to isolate the generator from the home. Do not run the unit under load until voltage is corrected.

• Inspect wiring: Open the alternator access panel and inspect the AVR harness and stator leads for loose connections, burnt insulation, or discoloration.
• Check engine speed: Visually confirm that the throttle linkage and governor arm are intact and not binding. Do not adjust governor springs without proper tools and specifications.
• Measure output (qualified persons only): Using a true RMS meter, verify line-to-line and line-to-neutral voltages during a manual test. If voltage exceeds specification, shut down immediately.
• Reset controller: Clear the fault and attempt a no-load test. If OVER VOLTAGE returns, suspect the AVR or control board.

When to call a technician: Overvoltage can damage household electronics. A technician should test and, if necessary, replace the Centurion AVR and verify proper governor adjustment.