If there is an abnormal noise during the operation of the fan, please refer to the following steps:
1. Check whether the grilles are installed properly;
2. Please verify that the Fan Blade locking cover and the rear grille locking cover are properly installed;
3. Check that the Fan Blade is intact and not deformed or loose;
4. Check whether there is any foreign matter stuck in the grilles;
5. Check whether there is any foreign matter stuck in the motor;
6. Reinstall the grilles;
7. Reinstall the locking cover;
8. Reinstall or adjust the Fan Blade to ensure it is secure and balanced;
9. Remove the foreign matter;
10. If the problem still exists, please apply for after-sales inspection.