Instructions / Assembly

TROUBLESHOOTING

Review the troubleshooting tips listed below before contacting Customer Service for support.

Symptom

Solution

A popping noise is coming from

the fan.

Airfoil noise occurs when

airfoils are not tightened to the

speciﬁed torque.

Disconnect the fan from power, and then tighten the airfoil hardware

to 29 ft·lb (39.3 N·m). If popping still occurs, verify that the airfoils are

not contacting each other. If they are, contact Customer Service.

The fan will not start. Make sure all wires are securely connected and that supply power

is adequate and functional. If the fan still does not start, contact

Customer Service.

The VFD generates radio

frequency (RF) noise.

VFDs generate RF noise in many

ways, but this can be prevented

using proper wiring practices.

• Do not run your fan and sensitive equipment on the same power

line.

• Ensure proper grounding at the motor, at the VFD, and from the

VFD to the utility.

If noise is still present, contact Customer Service.

The motor makes noise when

fan speed is increased.

• Audible high-frequency carrier noise may be an indicator of a stall

condition.

• Some motor, gearbox, or VFD noise is to be expected and is

normal.

The fan wobbles during

operation.

• Verify that the mounting structure is rigid enough to support the

fan and that the fan is not being exposed to external air forces.