| Troubleshooting | ||
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WARNING: Before taking any corrective action, make certain unit is not capable of operation during repairs. | |||
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PROBLEM | CAUSE | CORRECTIVE ACTION | |
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Too Much Airflow | Resistance lower than designed | Decrease fan speed. | |
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| Check backdraft dampers for proper operation. Remove | |
| System resistance too high | obstructions in ductwork. Clean dirty filters. Check for adequate | |
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| supply air for exhaust fans or exhaust air for supply fans. | |
Reduced Airflow | Fan too close to damper | Increase distance between fan and damper. | |
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Fan speed too low | Increase fan speed. | ||
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| Excessive dirt buildup on | Clean propeller. | |
| propeller | ||
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| Bearings | Tighten collars and fasteners. Lubricate bearings. Replace | |
| defective bearings. | ||
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| Tighten pulleys on motor and fan shaft. Adjust belt tension. Align | ||
| pulleys properly. Replace worn belts or pulleys. See Maintenance. | ||
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| Clean dirt buildup from propeller. Check all setscrews and | |
Excessive Noise | Excessive vibration | fasteners for tightness. Check for worn bearing. Correct propeller | |
| imbalance. Check for loose dampers, guards or ductwork. | ||
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| Defective motor | Replace motor. | |
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| Check VFD for drive setting, some controllers are able to be adjust | |
| Variable Frequency Drive (VFD) | to lower the harmonic noises sometimes heard during operation by | |
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| adjusting a simple setting on the controller. | |
| Debris | Remove all debris from the fan. | |
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| Electrical Supply | Check fuses/circuit breakers. Check for switches turned off or | |
| disconnected. Check for correct supply voltage. | ||
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Fan Does Not |
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Drive | Check for broken or worn belts. Tighten loose pulleys. | ||
Operate | |||
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Motor | Assure motor is correct horsepower and not tripping overload | ||
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Maintenance Documentation
Job Information
Job Name:___________________________________ | Service Organization:__________________________________ |
Address:_____________________________________ | Address:_____________________________________________ |
City:_________________________________________ | City:_________________________________________________ |
State:________________ Zip:__________________ | State:________________ Zip:___________________________ |
Phone:_______________________________________ | Phone:_______________________________________________ |
Contact Person:______________________________ | Work Done By:________________________________________ |
Nameplate Information | Field |
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Model:_______________________________________ |
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Volts:_ ________ Hertz:_________ Phase:_______ | Actual Voltage:________ Hertz:_______ | Phase:_________ | ||
Amps:_______________ | Mark:_________________ | Actual Amperage:_____________________________________ | ||
Supply hp:___________ | Exhaust hp:___________ | Blower Rotation:______________________________________ | ||
Serial Number:________________________________ | Air Volume: Design cfm:______________________________ | |||
Model Voltage:________________________________ | Actual cfm:______________________________ | |||
Motor Amperage:_ ____________________________ | Level of fan (L or H):___________________________________ | |||
Fan RPM:_ ___________________________________ | Fan RPM Range (min.)____________ (max.)______________ | |||
| Sidewall Propeller Fans • Exhaust, Supply and Filtered Supply |
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6 | ® | |||
