Owner's manual

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.