AL-KO robot mower displays E11 and stops when trying to drive forward or reverse.

Safety first: Turn off the main switch and remove the mower from the lawn before inspection.

• Check terrain: Ensure the mower is not operating on slopes beyond AL-KO's specification or in deep, soft soil. Adjust the working area if necessary.
• Clean wheels and chassis: Remove mud, wet grass, and debris from the drive wheels and wheel arches. Verify that the wheels rotate freely by hand.
• Inspect wheel bearings: Listen and feel for grinding or stiffness when turning the wheels. If present, the wheel motor assembly may be failing.
• Reduce cutting height: If the mower is struggling in tall grass, raise the cutting height and gradually lower it over several days.
• Electrical inspection: If E11 occurs even on flat, clean ground, inspect the main PCB for signs of overheating around the motor driver components. Replacement of the PCB or motor may be required.