Robot vacuum displays E9 and shuts down unexpectedly during cleaning

Safety first: Power OFF the robot and remove it from the dock. Do not attempt to open the battery pack itself.

• 1. Full recharge: Place the robot on the dock and allow it to charge uninterrupted for at least 4–6 hours until the app or indicator shows full charge.
• 2. Inspect battery contacts: If accessible, remove the battery cover on the underside of the robot. Check that the battery connector is fully seated and that there is no corrosion on the contacts.
• 3. Reduce load test: Remove the main brush and side brush, then run the robot. If it runs longer without E9, the battery is weak and the reduced load is masking the issue; plan to replace the battery pack.
• 4. Check age of battery: If the robot is more than 2–3 years old and runtime has noticeably decreased, the lithium battery pack is likely at end of life.
• 5. Replace battery: Purchase a compatible Trifo battery pack (matching voltage and connector). Power OFF the robot, disconnect the old pack, install the new one, and fully charge before first use.

Warning: Do not puncture, crush, or short-circuit the battery pack. Swollen, leaking, or hot batteries must be handled as hazardous waste and replaced immediately by a professional.