Controller shows E20 and the generator will not start or shuts down.

Safety first: Turn OFF the generator and allow the exhaust system to cool fully. Exhaust components remain hot for a long time.

• Inspect exhaust outlet: Check that the exhaust pipe and muffler outlet are not blocked by nests, debris, or snow. Clear any obstructions.
• Check load level: Verify that the generator is not operating continuously at or above its maximum kW rating. Reduce load if necessary.
• Fuel quality and mixture: For gas-fueled Hyundai Power units, ensure the gas pressure and mixture are within specification. Incorrect mixture can raise exhaust temperatures.
• Sensor check: Locate the exhaust temperature sensor on the exhaust manifold or pipe. Inspect wiring and replace the sensor if it is open-circuit or shorted.