1. The noise is too large: This may be due to bearing damage, impeller damage or air intake blockage and other reasons. Solutions include replacing the bearing or impeller, cleaning the air intake, etc.

2. Excessive blower vibration: Excessive blower vibration may cause damage to bearings or mechanical seals. The cause of excessive vibration may be the unbalanced hub of the blower, the foundation is not strong. The solution includes balancing the wheel hub of the blower and strengthening the foundation fixing.

3. Insufficient blower air output: Insufficient blower air output may be due to insufficient blower speed, air intake blockage, air outlet resistance and other reasons. The solution includes adjusting the blower speed and cleaning the air inlet and air outlet.

4. Motor overheating: Motor overheating may be due to the failure of the motor itself, unstable power supply voltage, motor overload and other reasons. The solution includes replacing the motor, stabilizing the power supply voltage, and reducing the motor load.

In view of the above minor faults, corresponding maintenance methods can be taken to repair them.

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