Whether it is any product, the use process needs maintenance and maintenance, so as to increase the service life of the product and not easy to malfunction. Hongfeng negative pressure fan represents daily negative pressure fan, which needs the following maintenance:

1. regularly check the fan motor, skeleton and other parts of the screw is loose

2. regularly check whether the fan blade screw is loose

3. check whether the fan motor works well, whether it slows down, whether the buffer is started or whether the noise is too high

4. check whether the fan switch is stable and keep the line well

5. check the voltage is stable, keep the line is good

6. keep the fan clean