27
®
Model MSX Make-Up Air
Motor Overamps
Troubleshooting
Air volume too high?
Adjust drives or increase external
static pressure as needed.
(Reference Blower Start-Up Step #5)
Motor horsepower too low?
Resize motor.
Motor voltage correct?
Provide proper power supply.
(Reference Blower Start-Up Step #1)
Blower rotation correct?
Reverse blower rotation.
(Reference Blower Start-Up Step #2)
Actual static pressure
lower than design?
Adjust drives to reduce blower RPM.
(Reference Blower Start-Up Step #5)
No
No
Yes
Yes
Yes
Yes
No
Yes
No
No
Shorted windings in motor?
Replace motor.
Yes
Everything is working
properly, consult factory.
Yes
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