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9
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Abnormal noise
Is the rated power supplied to the product?
Supply the rated power to the product.
Is the product securely mounted?
Is the strength at the mounting point of the product
enough?
Mount the product securely.
Make sure of the strength at the mounting
point.
No
No
No
Yes
Yes
Yes
Are any parts or components deformed?
Replace the deformed parts or components
with new ones.
Are any screws loose?
Retighten the screws.
Yes
Yes
No
No
Do any of the motors generate abnormal noise?
Replace the motors.
Yes
Abnormal vibration
Is the rated power supplied to the product?
Supply the rated power to the product.
Is the product securely mounted?
Is the strength at the mounting point of the product
enough?
Mount the product securely.
Make sure of the strength at the mounting
point.
No
No
No
Yes
Yes
Yes
Are any parts or components deformed?
Replace the deformed parts or components
with new ones.
Is the balance of the propeller fan lost due to attach-
ment of small particles such as dust?
Remove the small particles.
Yes
Yes
No