1: Confirm that the purifier is placed in the correct position.
2: The purifier fan will only be turned on when printing. (If the fan indicator light does not light up correctly during printing, it is abnormal)
3: If it does not turn on when printing, you need to open the back cover, plug and unplug the wiring, and check whether the purifier wiring is loose. If there is no improvement, send a new purifier, adapter cable and adapter board.