Generator controller displays E17 and the unit will not start or shuts down.

Safety: Let the engine cool fully before opening the cooling system. Hot coolant is dangerous.

• Check coolant level: Inspect the expansion tank and radiator (if accessible). Top up with the correct coolant mixture.
• Inspect for leaks: Look for dried coolant traces or wet spots around hoses, radiator, water pump, and engine block connections. Tighten clamps and replace damaged hoses.
• Test level sensor: Disconnect the coolant level sensor connector and test the sensor with a multimeter. Replace if it does not change state when submerged/removed from coolant.
• Bleed system: After topping up, bleed air from the system using bleed screws to prevent false low-level readings.
• Clear alarm and test: Reset E17 on the controller and run the generator while monitoring coolant level and for any new leaks.