484885 • Open Plenum Array, Rev. 1, June 2021
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8
As a result of our commitment to continuous improvement, Greenheck reserves the right to change specifications
without notice.
Product warranties can be found online at Greenheck.com, either on the specific product page or in the literature
section of the website at Greenheck.com/Resources/Library/Literature.
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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.
Parts List
Wheel
Motor
Drive
Frame
Problem
Cause
Corrective Action
Excessive Noise
Wheel rubbing (inlet)
Adjust wheel and/or inlet cone.
Tighten wheel hub or bearing collars on shaft.
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
Check duct installations with poor inlet or discharge configurations.
High CFM
Fan
Decrease fan speed.
High Horsepower Fan
Check rotation of wheel. Reduce fan speed.
Fan Doesn’t
Operate
Electrical supply
Check fuses/circuit breakers. Check for switches turned off or
disconnected. Check for correct supply voltage.
Motor
Assure motor is correct horsepower and not tripping overload protector.
Excessive
Vibration
System unbalance
Check wheel balance, rebalance if necessary.
* Always check motor amps and compare to nameplate rating. Excessive fan speed may overload the motor and
result in motor failure. Do not exceed the maximum cataloged RPM of the fan.
NOTE: Always provide the unit model and serial numbers when requesting parts or service information.
Troubleshooting