E20
Yeedi
Internal Communication Bus Failure
Robot vacuum displays E20 and stops; often associated with main board communication error between modules.
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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
Loose ribbon cable between main board and sensor boards, Corroded connectors, Firmware corruption, Main board hardware fault
How to Fix / Troubleshooting
Safety first: Turn the robot OFF and remove the battery if accessible.
- 1. Power reset: With the robot OFF, disconnect the battery for 1–2 minutes, then reconnect and power ON.
- 2. Firmware update: If the robot can still connect to the app, check for and install any available firmware updates.
- 3. Internal cable check (advanced): Open the robot and inspect all ribbon cables and harnesses between the main board, sensor boards, and motor drivers. Reseat each connector carefully.
- 4. Look for corrosion or damage: Check for signs of liquid ingress or burnt components on the main PCB.
- 5. Replace main board: If E20 persists after reseating cables and updating firmware, the main control board likely needs replacement.
Warning: If you see evidence of water damage inside, do not continue using the robot until it is fully inspected; short circuits can pose a fire risk.
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Repair Difficulty
Professional Required
5/5
Required Part
Main Control Board
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