Robot mower displays E3 and stops shortly after starting to mow.

Safety first: Turn the main switch OFF and remove the mower from the lawn. Wait until all moving parts have completely stopped. Remove the battery if accessible.

• Inspect cutting disc: Turn the mower upside down on a soft surface. Check the cutting disc and blades for wrapped grass, rope, branches, or stones. Carefully remove all debris.
• Check blades: Inspect each LandXcape pivoting blade for bends, chips, or excessive wear. Replace the full set of blades and screws if any are damaged or dull.
• Spin test: Manually rotate the cutting disc. It should spin freely without grinding or tight spots. If it feels stiff, the blade motor bearing or shaft may be damaged.
• Adjust mowing conditions: If the grass is very tall or wet, raise the cutting height to the maximum and mow in shorter sessions. Gradually lower the height over several days.
• Electrical check: If E3 appears immediately even with no load, the blade motor or motor driver on the main PCB may be faulty. Check the motor connector for loose pins or burnt smell.
• When to replace: Replace the LandXcape blade motor assembly if it overheats quickly, makes grinding noises, or fails to start under light load.