Replacing the Fan Unit
A fan installed in either the left or right bays is removed or installed in exactly the same manner as the power supply. Follow the steps below to replace a fan unit:
Caution: The concentrator must have two fans running at all times to cool the unit. This is achieved through the power supply fan and the fan unit that come standard with the concentrator, or by having two power supplies installed.
1.Remove and save the four screws that attach the fan to the rear of the concentrator as shown in Figure
Figure 3-5. Removing the Fan Unit
Maintenance 3 - 7
