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Troubleshooting
WARNING
Before taking any corrective action, make certain unit
is not capable of operation during repairs.
PROBLEM
CAUSE
Blown fuse or breaker
Ventilator
Incorrectly wired
Inoperative
Defective motor
Clogged filters
Incorrect wheel rotation
Excessive dirt build up on wheel
Improper wheel alignment
Insufficient
Fan RPM to slow
Airflow
Damper closed
Loose fitting duct sections permitting
air loss
System resistance to high
Accumulation of material on wheel
Loose wheel
Excessive
Wheel improperly aligned and rubbing Center wheel on inlet cone, see figure 1 (page 4)
Noise or
Wheel out of balance
Vibration
Foreign objects in wheel or housing
Ventilator base not securely anchored Secure properly
Incorrect wheel rotation
Motor
Overlaoads or
Shorted motor winding
Overheats
Over/Under line voltage
®
For Vari-Green
motor troubleshooting, refer to the Vari-Green Motor Installation, Operation, and Maintenance Manual.
Our Commitment
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.
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.
®
Phone: 715.359.6171 • Fax: 715.355.2399 • Parts: 800.355.5354 • E-mail: gfcinfo@greenheck.com • Website: www.greenheck.com
12
486132 • KSQ, Rev. 2, April 2024
AVERTISSEMENT
Avant d'entreprendre toute action corrective, s'assurer
que l'appareil ne pourra pas fonctionner durant les
réparations.
CORRECTIVE ACTION
Replace or repair
Shut power OFF and check wiring for proper connections
Replace or repair
Clean or replace
Correct rotation, see page 4, step 3 to correct wheel rotation
Clean wheel
Center wheel on inlet cone, see figure 1 (page 4)
Adjust speed with Vari-Green
Inspect/repair damper
Check for secure connection where duct sections are joined
(suggest duct tape at seams for sealed closure)
Check system: proper orientation and operation of
backdraft or control dampers, obstructions in ductwork.
Clean wheel
Tighten set screws
Check wheel balance, rebalance in place if necessary
Remove objects and check for damage or imbalance
Check motor wiring
Replace motor
Contact power company
Copyright 2024 © Greenheck Fan Corporation
®
control or VFD (if applicable)
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