Greenheck Fan PN 471755 - Manual (Page 6)

6 Sidewall Propeller Fans • Exhaust, Supply and Filtered Supply
®
Troubleshooting
WARNING: Before taking any corrective action, make certain unit is not capable of operation during repairs.
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 adjust
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.
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 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.) _____________