This is most likely a fault code. Big Ass Fans have built-in checks that look for both internal and external faults.
If your keypad reads “F_EF,” this means that the fire alarm has gone off while the fan was connected to your fire panel.
Regardless of the fault code, press the red “Stop” button to clear it. View the full list of fault codes.
Video: Clearing Faults on the PF8/B6/Pivot/HVLS Jet/ShopFan Controller
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