1. The ground on which the machine is located, maybe uneven or clogging objects. Resulting in abnormal sound caused by the friction between the universal wheel or the side brush strip and the ground.
2. The roller brush is stuck.
3. There are clogging objects stuck in the power wheels on both sides.
4. There are clogging objects in the dust box, blocking the air inlet.
5. Motor fan failure.
Step 1. Replace the operating ground environment to see if the abnormal sound also exists and has no change. If the change is related to the ground environment, it indicates that the abnormal sound was caused by it.
Step 2. Please clean the roller brush assembly, side brush, and dust box, press the power wheels on both sides, and shake the fuselage to remove clogging objects.
Step 3. Remove the side brush and roller brush and restart the machine.
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