Robot vacuum shows E11; app may indicate 'Filter missing' or 'Filter not installed'.

Safety first: Turn OFF the robot and remove the dust bin.

• Check filter installation: Remove the filter from the dust bin and reinstall it according to the arrows or guides on the bin. Ensure it is fully seated and locked.
• Use correct filter: Verify that you are using a Philips-compatible filter designed for your specific robot model.
• Inspect filter frame: Look for cracks or missing tabs on the filter frame that might prevent proper engagement with the sensor.
• Clean sensor area: If there is a small switch or optical sensor near the filter slot, gently clean around it with a dry cotton swab.
• Reassemble and test: Reinstall the filter and dust bin, then power ON the robot and check if E11 clears.
• Service if needed: If the error persists with a correct, properly installed filter, the filter detection sensor may need replacement by a service center.