Robot vacuum displays E3 and suction is lost or intermittent.

Safety first: Turn off the robot and remove the dustbin.

• Empty dustbin: Open the bin and empty all contents. Tap gently to dislodge fine dust.
• Clean cyclone and channels: Inspect the internal cyclone and air passages for clumps of dust or objects. Remove carefully.
• Check suction inlet: With the main brush removed, look into the suction opening for blockages and clear them.
• Clean/replace filter: If the filter is heavily soiled, clean or replace it according to Samsung’s instructions.
• Test suction: Reassemble and start the robot. If E3 persists, the suction sensor or fan motor may be faulty and require service.