Direct Drive (AVD370, AVD3, AVD5, AVDX) FAQ (Public)

For general FAQs that include the direct drive fan lines, please refer to the General FAQ and General Troubleshooting FAQ. For questions on controllers used on direct drive fan lines, refer to the Controllers FAQ.

I ordered a 14’ AVDX, but actually needed a 16’. Can I order larger blades?

Current AVDX fans use two different motor sizes, one for 8'-18' and one for 20'-24'. Previous AVDX motors used three different motor sizes: one for 8'-12', one for 14'-18' and one for 20'-24'. If you are unsure what size motor you have, please contact Technical Support with your order or serial number. Diameters can be freely exchanged in the motor's diameter range, but you cannot use 20’ or 24’ blades on a motor meant for 8’-18’, or vice versa. Diameter changes outside of the motor range will require a new fan. Diameter changes within the motor range will require VFD reprogramming. Please contact Technical Support for assistance.

I ordered a 14’ AVD5, but actually needed a 16’. Can I order larger blades?

AVD5 fans use three different motor sizes: one for 8'-14', one for 16'-18', and one for 20'-24'. If you are unsure what size motor you have, please contact Technical Support with your order or serial number. Diameters can be freely exchanged in the motor's diameter range, but you cannot use 20’ or 24’ blades on a motor meant for 16’-18’, or vice versa. Diameter changes outside of the motor range will require a new fan. Diameter changes within the motor range will require VFD reprogramming. Please contact Technical Support for assistance.

I ordered a 14’ AVD3, but actually needed a 16’. Can I order larger blades?

AVD3 fans use two different motor sizes, one for 8'-14' and one for 16'-24'. If you are unsure what size motor you have, please contact Technical Support with your order or serial number. Diameters can be freely exchanged in the motor's diameter range, but you cannot use 16'-24’ blades on a motor meant for 8'-14' or vice versa. Diameter changes outside of the motor range will require a new fan. Diameter changes within the motor range will require VFD reprogramming. Please contact Technical Support for assistance.

The "CAN" light is blinking on my Schneider VFD. Is something wrong?

The CAN light indicates a CANopen error. CANopen is a communication protocol similar to Modbus. We do not use CANopen since we use Modbus. Since CANopen is not used, those parameters are used for read-only references to ensure that a drive is programmed. Therefore, it is normal for the CAN light to be on since those parameters are programmed and CANopen is not being used.