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