E30
Himoinsa Fuel Tank Overfill / Fuel in Bund Alarm

Controller shows E30 and the generator shuts down with a strong fuel smell in the enclosure.

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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

Leaking fuel tank, Overfilled main tank, Faulty bund level sensor, Damaged fuel return line

How to Fix / Troubleshooting

Safety: Stop the generator immediately. Ventilate the area and eliminate all ignition sources. Wear appropriate PPE.

  • Inspect bund: Check the base bund of the Himoinsa generator for accumulated fuel. Pump out and dispose of fuel according to regulations.
  • Locate leak: Inspect main tank, day tank, and fuel lines for leaks or cracks. Repair or replace damaged components.
  • Check bund sensor: Test the bund level sensor with a multimeter. Replace if it falsely indicates fuel presence.
  • Prevent overfill: Ensure filling procedures and any automatic filling systems are correctly set to avoid overfilling the tank.
  • Reset alarm: After resolving leaks and cleaning the bund, reset E30 and test operation while monitoring for new leaks.
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Repair Difficulty

Hard 4/5

Required Part

Bund Level Sensor
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