Robot mower displays E5 and stops; often after hitting an obstacle or on uneven ground.

Safety first: Turn OFF the main switch before moving the mower.

• Check terrain: Verify that the mower is not working on slopes steeper than the maximum allowed for your Stiga model. Reduce the working area on steep banks or terrace them.
• Level surface test: Place the mower on a flat, level area. Turn it ON and clear the error. If E5 appears even on level ground, the tilt sensor may be faulty.
• Inspect wheels and chassis: Uneven wheel sizes (due to wear or damage) or a bent chassis can cause false tilt readings. Check for physical damage.
• Internal sensor check (advanced): Remove the top cover and locate the tilt sensor module (often a small PCB or sealed module fixed to the chassis). Ensure it is firmly screwed down and not loose.
• Reset: Some models allow a factory reset or sensor calibration via the menu. Perform this only if recommended in the user manual.
• Service: If E5 persists, the tilt sensor module or main board input likely needs replacement by a technician.