Greenheck Fan Centrifugal Utility Fan Model SWB Series 100 - Manual (Page 8)

Problem Cause Corrective Action
Excessive Noise
Wheel Rubbing Inlet
Adjust wheel and/or inlet cone. Tighten wheel hub or bearing
collars on shaft.
V-Belt Drive
Tighten sheaves on motor/fan shaft. Adjust belt tension. Align
sheaves properly (see page 4). Replace worn belts or sheaves.
Bearings
Replace defective bearing(s). Lubricate bearings. Tighten
collars & fasteners.
Wheel Unbalance
Clean all dirt off wheel. Check wheel balance, rebalance in
place if necessary.
Low CFM
Fan Check wheel for correct rotation. Increase fan speed.*
Duct System See page 3.
High CFM
Fan Resize ductwork. Access door, filters, grills not installed.
Duct System
Change obstructions in system. Use correction factor to adjust
for temperature/altitude. Resize ductwork. Clean filters/coils.
Change fan speed.*
Static Pressure
Wrong
Duct system has more
or less restriction than
anticipated
Check rotation of wheel. Adjust fan speed.
High Horsepower
Fan Check rotation of wheel. Reduce fan speed.
Duct System
Resize ductwork. Check proper operation of face and bypass
dampers. Check filters and access doors.
Fan Doesn’t Operate
Electrical Supply
Check fuses/circuit breakers. Check for switches off. Check for
correct supply voltage.
Drive Check for broken belts. Tighten loose pulleys.
Motor
Assure motor is correct horsepower and not tripping overload
protector.
Overheated Bearing
Lubrication Check for excessive or insufficient grease in the bearing.
Mechanical
Replace damaged bearing. Relieve excessive belt tension.
Align bearings. Check for bent shaft.
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.
Troubleshooting
8 455308 • SWB / SFB / SFD, Rev. 7, March 2013 Copyright 2013 © Greenheck Fan Corporation
As a result of our commitment to continuous improvement, Greenheck reserves the right to change specifications
without notice.
Specific Greenheck product warranties are located on greenheck.com within the product area tabs and in the
Library under Warranties.
Greenheck Centrifugal Utility Fan catalog provides additional
information describing the equipment, fan performance,
available accessories, and specification data.
®
Phone: 715.359.6171 • Fax: 715.355.2399 • Parts: 800.355.5354 • E-mail: [email protected] • Website: www.greenheck.com
Our Commitment
AMCA Publication 410-96, Safety Practices for Users and
Installers of Industrial and Commercial Fans, provides
additional safety information. This publication can be
obtained from AMCA International, Inc. at www.amca.org.