Sidewall Propeller Fans6
PROBLEM CAUSE CORRECTIVE ACTION
Too much airflow Resistance lower than designed Decrease fan speed.
Reduced airflow
System resistance too high
Check backdraft dampers for proper operation. Remove obstructions in
ductwork. Clean dirty filters. Check for adequate supply air for exhaust
fans or exhaust air for supply fans.
Fan too close to damper Increase distance between fan and damper.
Fan speed too low Increase fan speed.
Excessive dirt buildup on propeller Clean propeller.
Excessive noise
Bearings
Tighten collars and fasteners. Lubricate bearings. Replace defective
bearings.
V-belt drive
Tighten pulleys on motor and fan shaft. Adjust belt tension. Align
pulleys properly. Replace worn belts or pulleys. See Maintenance.
Excessive vibration
Clean dirt buildup from propeller. Check all setscrews and fasteners for
tightness. Check for worn bearing. Correct propeller imbalance. Check
for loose dampers, guards or ductwork.
Defective motor Replace motor.
Variable frequency drive (VFD)
Check VFD for drive setting, some controllers are able to be adjusted
to lower the harmonic noises sometimes heard during operation by
adjusting a simple setting on the controller.
Debris Remove all debris from the fan.
Fan does not
operate
Electrical supply
Check fuses/circuit breakers. Check for switches turned off or
disconnected. Check for correct supply voltage.
Drive Check for broken or worn belts. Tighten loose pulleys.
Motor Assure motor is correct horsepower and not tripping overload protector.
Job Information
Job Name: ___________________________________ Service Organization: __________________________________
Address: _____________________________________ Address: _____________________________________________
City: ________________________________________ City: _________________________________________________
State: _______________ Zip: __________________ State: _______________ Zip: __________________________
Phone: ______________________________________ Phone: ______________________________________________
Contact Person: ______________________________ Work Done By: _______________________________________
Nameplate Information Field Start-Up Documentation
Model: ______________________________________
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.) _____________
Maintenance Documentation
WARNING
Before taking any corrective action, make certain unit
is not capable of operation during repairs.
AVERTISSEMENT
Avant d’entreprendre toute action corrective, s’assurer
que l’appareil ne pourra pas fonctionner durant les
réparations.
Troubleshooting
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