E18
Robomow
Low Internal Logic Voltage / Power Regulation Fault
Robomow displays E18 and stops, sometimes accompanied by erratic behavior or random resets.
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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
Failing main board voltage regulator, Loose battery connection, Corroded power connector, Internal short drawing excess current
How to Fix / Troubleshooting
Safety first: Turn the mower OFF and disconnect from the base station before opening covers.
- Check battery connectors: Open the service cover and verify the battery connectors are tight and free of corrosion. Clean and reseat as needed.
- Inspect wiring harness: Look for pinched or damaged wires that could cause intermittent shorts.
- Power cycle: Turn OFF for 60 seconds, then ON and observe if the mower operates normally for a while.
- Monitor behavior: If the mower resets or shows E18 when the blade starts, the load may be causing voltage sag due to a weak battery or regulator.
- Professional diagnosis: Because this involves internal power regulation, the main board or battery may need replacement by a service center.
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Repair Difficulty
Professional Required
5/5
Required Part
Main Control Board
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