E20
OKP
Main Board / Motor Driver Communication Fault
Robot vacuum shows E20 and cannot start due to internal communication error
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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 internal wiring harness, Motor driver IC failure, Corrupted firmware, Damaged main PCB traces
How to Fix / Troubleshooting
Safety first: Turn OFF the robot, remove it from the dock, and do not attempt advanced board repair unless qualified.
- Step 1 – Hard reset: Turn OFF the main switch for 1–2 minutes, then turn it back ON.
- Step 2 – Firmware update: Use the OKP app to check for firmware updates and install if available.
- Step 3 – Basic internal check (advanced users): Remove the bottom cover and verify that all motor and sensor connectors are firmly seated on the main board.
- Step 4 – If E20 persists: The main control board or motor driver circuitry is likely faulty and should be replaced as a complete assembly.
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Repair Difficulty
Professional Required
5/5
Required Part
Main Control Board
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