1. Verify is there any display error shown?

•Refer to the "Display abnormal" guide

2. Confirm whether the HEPA filter is installed or not.

•Please make sure that the HEPA is installed properly.

3. Confirm whether there is dirt or debris in the tube or on the brush roller.

•Please clean the brush roller and tube according to picture instructions.

4. Examine the scraper and see if there is dirt or debris on the scraper. Check if the scraper is deformed.

•Clean debris & dirt in the scraper with the 3 in 1 tool .

Please Note: The amount of time that the roller brush has been used could lead to the erosion of the fibers on the brush roller. If the erosion has been caused by usage based on 3 months with an average usage of 15 min per day, then the brush roller could be damaged.