Problem
Excessive
Noise
Low
CFM
High
CFM
Static
Pressure
Wrong
High
Horsepower
Fan
Doesn’t
Operate
Overheated
Bearing
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.
IOM SWB/SFB/SFD FS
Rev. 2 February 2001
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.
Fan
Check wheel for correct rotation.
Increase fan speed.*
Duct System
See page 3.
Fan
Decrease fan speed.
Duct System
Resize ductwork. Access door,
filters, grills not installed.
Duct system has
more or less
restriction than
anticipated
Change obstructions in system. Use
correction factor to adjust for
temperature/altitude. Resize ductwork.
Clean filters/coils. Change fan speed.*
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.
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.
Lubrication
Check for excessive or insufficient grease
in the bearing.
Mechanical
Replace damaged bearing. Relieve excessive
belt tension. Align bearings.
Check for bent shaft.
Cause Corrective Action
8
TROUBLESHOOTING
Warranty
Greenheck warrants this equipment to be free from defects in material and workmanship for a period of one year from the
purchase date. Any units or parts which prove 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.
Copyright © 2001 Greenheck Fan Corp.
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