Robot vacuum displays E1 and will not start cleaning.

Safety first: Turn off the robot and remove it from the dock before working underneath.

• Remove main brush: Unlock the brush cover and lift out the main brush. Clear all hair, threads, and debris from the bristles and end caps.
• Clean brush housing: Remove any debris from the brush chamber and suction inlet.
• Inspect brush ends: Ensure the end caps spin freely. If they are seized or melted, replace the main brush assembly.
• Test without brush: With the brush removed, start the robot briefly. If the motor spins freely and E1 clears, reinstall a cleaned or new brush. If the motor does not spin, the motor or wiring is likely faulty and needs replacement.