What modules do I need to run HVLS fans on a VFD?

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• Can I control variable fans with this control?

  No, it is for fixed-speed fans or heaters only. If you need variable control, the FC-1T-1VAC controls variable fans.

• How to control Sunnorth Altra-Air Sailfin HVLS fans

  You can control them with a 0-10v or using the Modbus communication protocol. The FC-1T-1VDC is a standalone control that will work.

• Why does my fan not run at full speed when I turn the knob all the way up?

  You may need to increase the High Limit trimmer. For more information, see Limits for 120/230 VAC fans in the user manual.

• Why does my control want me to downgrade my modules?

  This can be caused by your control's "Release version" being older than your modules firmware. To solve this: Do not downgrade modules. Ensure current release version update file is on the PHASON USB ready to be installed. Then install these updates ...

• Do I have to turn the power off to change the modules?

  Yes, you should always turn the power off whenever adding or removing modules.