Replace A 5U Power Supply Unit - Seagate Exos X 4006 Series Hardware Installation And Maintenance Manual

a. Facing the rear of the rack cabinet, press downward to release the FCM latch.
b. Use one hand to support the FCM's weight and the other to gently withdraw the FCM all the way from its slot.
c. Place it in a static-protected location.
3. Complete the following actions to replace the faulty FCM with a tested, good one:
a. Orient the new FCM with the latch to the right.
b. Use one hand to support the weight of the FCM and the other to guide it into the empty FCM slot.
c. Exerting even pressure to the center, gently press inward until it connects with the midplane and it locks in place.
4. Verify the FCM OK LED is lit green on the replaced FCM after properly inserting and seating it in the empty slot.
5. Facing the front of the storage enclosure, verify that the Power On LED is green and there are no fault conditions.

Replace a 5U power supply unit

Both power supply units (PSUs) provide power to the storage enclosure within 200-240VAC at 50-60Hz.
Each PSU has three status LEDs. The asterisk (*) indicates a fault condition.
Figure 86 Fan cooling module removal
Figure 87 Fan cooling module
Chapter 11 In-service field maintenance for 5U enclosures
112