E20
Himoinsa
Low Cranking Speed / Engine Start Failure
The controller displays E20, and the generator shuts down during cranking or immediately after starting.
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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
Weak batteries, high resistance in starter cables, seized engine or accessory, or a faulty starter motor drawing excessive current.
How to Fix / Troubleshooting
Safety: Isolate the battery and ensure no automatic start. Do not crank repeatedly to avoid overheating the starter.
- Measure cranking voltage: Monitor battery voltage during a start attempt. A significant drop indicates weak batteries or high resistance.
- Inspect cables: Check the starter's positive and negative cables for corrosion, loose lugs, or undersized conductors. Clean and tighten as needed.
- Check engine rotation: Attempt to rotate the engine manually at the crankshaft (if accessible) to ensure it is not seized.
- Test starter current draw: Use a clamp meter to measure the starter current. Excessive current with slow cranking suggests a failing starter motor that should be replaced.
- Replace weak batteries: If batteries are old or fail a load test, replace them with the correct capacity specified by Himoinsa.
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Repair Difficulty
Medium
3/5
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