Motor Overamps - Greenheck VSU Installation, Operation And Maintenance Manual

Troubleshooting

Motor Overamps

Air volume too high?
No
Actual static pressure
lower than design?
No
Blower rotation correct?
Yes
Motor voltage correct?
Yes
Motor horsepower too low?
No
Shorted windings in motor?
Yes
Everything is working
properly, consult factory.
®
Yes
Reference: Start-Up - Blower, Air Volume Measurement and Check, pg. 14
Yes
Reference: Start-Up - Blower, Air Volume Measurement and Check, pg. 14
No
Reference: Start-Up - Blower, Check the Blower Rotation
No
Reference: Start-Up - Blower, Check the Voltage, pg. 14
Yes
Yes
Adjust drives or increase external
static pressure as needed.
Adjust drives to reduce blower RPM.
Reverse blower rotation.
Provide proper power supply.
Resize motor.
Replace motor.
Model VSU Make-Up Air 23