Replace Power Supply Unit (Psu) - Synology NAS RS3621xs+ Hardware Installation Manual

5 Prepare a new fan and slide it into the your RS3621xs+. Make sure that the fan is aligned properly, as shown
below.

Replace Power Supply Unit (PSU)

If a PSU or its fan malfunctions, please follow the steps below to replace the malfunctioning PSU.
1 Unplug the power cord from the PSU that is to be replaced.
Note: By pressing the Beep Off button, you can silence the long beep when it sounds.
2 On the rear panel, push the lever of the PSU inward as shown.
3 Pull the PSU out of your RS3621xs+.
3
2
4 Prepare a new PSU. Insert it into the empty slot until you hear a click.
23 Chapter 3: System Maintenance