2.Carefully pull the fan unit out from the concentrator and disconnect the wiring harness from the plug inside the base of the ONline unit as shown in Figure
Figure 3-6. Unplugging the Fan Unit
3.Pick up the new fan unit and plug the fan power lead in the same connector in the base of the ONline unit from which you removed the old fan (plug P0).
4.Slide the new fan unit into the back of the concentrator and fasten it to the unit with the four (4) screws you removed from the defective unit as shown in Figure
3 - 8 ONline
