E9
OKP
Battery Protection / Low Voltage Lockout
Robot vacuum shows E9 and does not respond to start commands
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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
Battery pack deeply discharged, Battery connector loose, Battery cells degraded, Charging circuit fault on main board
How to Fix / Troubleshooting
Safety first: Ensure the dock is on a non-flammable surface and use only the original OKP charger.
- Step 1 – Hard power reset: Turn the main power switch OFF for 30 seconds, then back ON.
- Step 2 – Manual docking: Place the robot directly onto the charging dock so the contacts align. Confirm the charging indicator on the robot lights up.
- Step 3 – Extended charge: Allow the robot to charge uninterrupted for at least 4–6 hours, even if it appears unresponsive at first.
- Step 4 – Check battery connection (advanced): If comfortable, remove the bottom cover (after turning OFF and removing from dock) and verify the battery connector is firmly plugged into the main board.
- Step 5 – Test run: After charging, start a cleaning cycle. If E9 reappears quickly or the runtime is very short, the battery pack is likely worn out and should be replaced.
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Repair Difficulty
Medium
3/5
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