How to deal with the abnormal noise of Xiaomi Smart Air Purifier 4?

Solution:

1. If there is abnormal noise during work, firstly check whether the filter installation is normal and whether the filter bag is removed;

2. Next, check whether there are foreign objects entering the purifier. If any foreign objects fall into the purifier, open the filter compartment and take out the foreign objects.

3. Check whether there is foreign matter entering the laser particle sensor.