Ventilation fan is an important ventilation equipment, and its normal operation plays a crucial role in the cleanliness of the environment and the quality of air. However, in practical applications, ventilation fans may also encounter some common faults. The following are some common faults and their maintenance methods:

Fan does not rotate: The fan may not rotate due to reasons such as power failure, motor damage, and motor bearing damage. When repairing, first check if the power supply is connected, and then check if the motor or bearings are damaged.

High operating noise of ventilation fans: The high operating noise of ventilation fans may be caused by blade wear, dust accumulation inside the fan, and unbalanced fan blades. When repairing, the dust inside the fan should be cleaned first, and then the blades should be checked for wear or imbalance. If the blades are worn or unbalanced, they should be replaced or adjusted.

Low efficiency of ventilation fans: Low efficiency of ventilation fans may be caused by unbalanced fan blades, dust accumulation inside the fan, and wear of fan blades. When repairing, the dust inside the fan should be cleaned first, and then the blades should be checked for wear or imbalance. If the blades are worn or unbalanced, they should be replaced or adjusted.

High vibration of ventilation fan: High vibration of ventilation fan may be caused by unbalanced fan blades, wear of fan blades, and dust accumulation inside the fan. When repairing, the dust inside the fan should be cleaned first, and then the blades should be checked for wear or imbalance. If the blades are worn or unbalanced, they should be replaced or adjusted.

In summary, the common faults and maintenance methods of ventilation fans mainly include fan failure, high operating noise, low efficiency, and high vibration. When repairing, it is necessary to first check whether the power supply, motor, blades, and other components are damaged or dusty, and then replace or adjust them.