Generator runs but controller shows E12 and may not transfer load

Safety first: Isolate the generator from the building by opening the main breaker. Disable auto-start and disconnect non-essential loads.

• Measure frequency: With a true-RMS meter capable of frequency measurement, check the generator output frequency at no load. It should be near 50 Hz or 60 Hz depending on your region and model.
• Inspect governor linkage: Ensure the mechanical linkage between the governor actuator and throttle is free-moving and not binding. Lubricate pivot points lightly.
• Check speed sensor: Inspect the engine speed sensor (magnetic pickup) for proper mounting and clean tip. Ensure the wiring harness is intact.
• Stabilize load: Avoid connecting large motor loads all at once. If frequency only goes out of range when a specific load starts, consider soft-start options or staggering load application.
• Professional adjustment: Frequency calibration often requires service tools and should be performed by a Honda technician to avoid overspeed or underfrequency damage.