Robot mower displays E5 and stops moving, even though the blades may still spin briefly.

Safety first: Turn the mower OFF and remove the key. Lift the mower only by the designated handles and keep fingers away from wheels and blades.

• Inspect wheels: Check both rear drive wheels and the front caster(s) for stones, branches, or packed grass preventing rotation. Remove any obstruction.
• Check wheel rotation: With the mower off the ground, rotate each drive wheel by hand. They should turn smoothly with some gearbox resistance but no grinding or binding.
• Clean wheel hubs: Remove grass and dirt from the wheel hubs and around the axle area using a brush.
• Check for damage: Look for cracked wheel rims or a misaligned wheel that may be rubbing the chassis.
• Test run: Place the mower back on level ground, power it ON, and start a short manual run. If E5 appears only on slopes or rough ground, the gearbox or motor may be weakening.

Persistent E5 faults after cleaning usually indicate a failing drive motor or gearbox assembly that should be replaced as a unit.