To troubleshoot the issue, please refer to the following steps:
1. Observe whether the fan blades are operating normally from the air outlet grille. If not, unplug the power plug and wait for 30 seconds before plugging it in and turning it on again;
2. Check whether the Child lock is turned on. If so, you can turn off the Child lock and try again.
If the problem still exists after performing the above steps, it is recommended to go to the after-sales service center for inspection.