Robot vacuum displays E9 and may not connect to the app or respond to network commands.

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.

Possible Causes

Wi‑Fi module failure, Antenna damage, Firmware issue, Router incompatibility

Safety first: No special safety concerns beyond normal electrical precautions.

Reset Wi‑Fi settings: Use the robot’s controls to reset network settings and re‑pair with the Samsung app.
Check router settings: Ensure 2.4 GHz Wi‑Fi is enabled and that MAC filtering or isolation is not blocking the robot.
Firmware update: If you can connect intermittently, update the robot’s firmware via the app.
Persistent E9: Suggests a hardware fault in the Wi‑Fi module or main PCB, requiring replacement.

Medium 3/5

Main PCB Assembly

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