Troubleshooting
Problem and Potential Cause
Low Capacity or Pressure
•
Incorrect direction of rotation. Make sure the fan rotates in same direction as the arrows on the motor or drive belt
assembly.
•
Poor fan inlet conditions. There should be a straight clear duct at the inlet.
•
Improper wheel alignment.
Excessive Vibration and Noise
•
Damaged or unbalanced wheel.
•
Belts too loose; worn or oily belts.
•
Speed too high.
•
Incorrect direction of rotation. Make sure the fan rotates in same direction as the arrows on the motor or drive belt
assembly.
•
Bearings need lubrication or replacement.
•
Fan surge or incorrect inlet condition.
Overheated Motor
•
Motor improperly wired.
•
Incorrect direction of rotation. Make sure the fan rotates in same direction as the arrows on the motor or drive belt
assembly.
•
Cooling air diverted or blocked.
•
Improper inlet clearance.
•
Incorrect fan RPM.
•
Incorrect voltage.
Overheated Bearings
•
Improper bearing lubrication.
•
Excessive belt tension.
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