Troubleshooting
Problem | Cause | Corrective Action | |
| Wheel Rubbing Inlet | Adjust wheel and/or inlet cone.. Tighten wheel hub or bearing | |
| collars on shaft.. | ||
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| Tighten sheaves on motor/fan shaft.. Adjust belt tension.. Align | ||
| sheaves properly (see page 4).. Replace worn belts or sheaves.. | ||
Excessive Noise |
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Bearings | Replace defective bearing(s).. Lubricate bearings.. Tighten | ||
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| collars & fasteners.. | ||
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| Wheel Unbalance | Clean all dirt off wheel.. Check wheel balance, rebalance in | |
| place if necessary.. | ||
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Low CFM | Fan | Check wheel for correct rotation.. Increase fan speed..* | |
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Duct System | See page 4.. | ||
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| Fan | Resize ductwork.. Access door, filters, grills not installed.. | |
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High CFM |
| Change obstructions in system.. Use correction factor to adjust | |
| Duct System | for temperature/altitude.. Resize ductwork.. Clean filters/coils.. | |
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| Change fan speed..* | |
Static Pressure | Duct system has more |
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or less restriction than | Check rotation of wheel.. Adjust fan speed.. | ||
Wrong | |||
anticipated |
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| Fan | Check rotation of wheel.. Reduce fan speed.. | |
High Horsepower |
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Duct System | Resize ductwork.. Check proper operation of face and bypass | ||
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| dampers.. Check filters and access doors.. | ||
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| Electrical Supply | Check fuses/circuit breakers.. Check for switches off.. Check for | |
| correct supply voltage.. | ||
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Fan Doesn’t Operate | Drive | Check for broken belts.. Tighten loose pulleys.. | |
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| Motor | Assure motor is correct horsepower and not tripping overload | |
| protector.. | ||
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| Lubrication | Check for excessive or insufficient grease in the bearing.. | |
Overheated Bearing |
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Mechanical | Replace damaged bearing.. Relieve excessive belt tension.. | ||
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| Align bearings.. Check for bent shaft.. | ||
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NOTE: Always provide the unit model and serial numbers when requesting parts or service information..
*Always check motor amps and compare to nameplate rating.. Excessive fan speed may overload the motor and result in burnout..
Warranty
Greenheck warrants this equipment to be free from defects in material and workmanship for a period of one year from the shipment date.. Any units or parts which prove to be defective during the warranty period will be replaced at our option when returned to our factory, transportation prepaid.. Motors are warranted by the motor manufacturer for a period of one year.. Should motors furnished by Greenheck prove defective during this period, they should be returned to the nearest authorized motor service station.. Greenheck will not be responsible for any removal or installation costs..
As a result of our commitment to continuous improvement, Greenheck reserves the right to change specifications without notice.
Greenheck Centrifugal Utility Fan catalog provides additional information describing the equipment, fan performance, available accessories, and specification data..
AMCA Publication
®
Phone: (715)
8 | 455308 • SWB / SFB / SFD, Rev. 6, June 2011 | Copyright 2011 © Greenheck Fan Corporation |