User 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. T here 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 blocke d.

 Improper inlet clearance.

 Incorrect fan RPM.

 Incorrect voltage.

Overheated Bearings

 Improper bearing lubrication.

 Excessive belt tension.

Parts List

Fig. 9 – RKW Fan (typical)