Mitsubishi Electric GK-2509YS2-CE Handbook page 9

Abnormal noise
Is the rated power supplied to the product?
Is the product securely mounted?
Is the strength at the mounting point of the product
strong enough?
Are any parts or components deformed?
Are any screws loosened?
Do any of the motors generate abnormal noise?
Abnormal vibration
Is the rated power supplied to the product?
Is the product securely mounted?
Is the strength at the mounting point of the product
strong enough?
Are any parts or components deformed?
Is the balance of the propeller fan lost due to attach-
ment of dust?
Yes
Yes
Yes
No
No
Yes
Yes
Yes
No
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Supply the rated power to the product.
No
Mount the product securely.
No
Increase the strength at the mounting point.
No
Replace the deformed parts or components.
Yes
Retighten the screws.
Yes
Replace the motors.
Yes
Supply the rated power to the product.
No
Mount the product securely.
No
Increase the strength at the mounting point.
No
Replace the deformed parts or components.
Yes
Remove the dust.
Yes