Nexsan Nexsan Unity, Hardware Maintenance Manual, Page: 50 / 76

5. Snip the pull ties holding the fan’s power wires to the chassis.
6. Unclip the retaining tab and gently remove the power plug from the socket.
Figure 2-19: Disconnecting the fan’s power plug
7. Insert the power plug for the replacement fan into the socket and gently press until the retaining tab
clicks.
8. Re-secure the power wires with new pull ties.
9. Gently place the replacement fan into the slot. Press firmly down to ensure that it is properly seated.
Figure 2-20: Replacing Primary Fan 2 or 3
10. If necessary, replace the fan bracket.
11. Replace Secondary Fan 1 (see Replacing a fan on page 43, far left photograph). Press firmly down to
ensure that it is properly seated.
12. Guide the controller into the slot and slide it in until some resistance is met, then push the extraction
handle up to seat the controller. See Replacing a Unity Storage System controller on page 54.
13. Re-secure the extraction handle retaining bolt. See Replacing a Unity Storage System controller on
page 54.
14. Replace all cables on the new controller.
Notes: Be sure to put all cables back into the proper ports. See Step 4 under System sub-components
on page 41.
If the controller does not automatically start up, select it in Unity and click the Turn On button in its
Properties panel at the bottom of the screen.
Fans
2
Nexsan Unity Hardware Maintenance Guide v. 5.1 Unity 50