Dell Power Supply C8000 Owner's Manual page 199

WARNING:
The PSU modules in the power sled may produce high voltages and
energy hazards, which can cause bodily harm. Only trained service technicians
are authorized to remove any components inside the power sled.
WARNING:
To reduce the risk of personal injury from hot surfaces, observe the
thermal labels on each PSU module. You can also consider wearing protective
gloves.
WARNING:
To reduce the risk of personal injury from electric shock hazards, do
not open the PSU modules. There are no serviceable parts inside the PSU modules.
CAUTION:
Remove and replace only one power sled at a time.
NOTE:
The wattage of a PSU module is listed on its regulatory label.
1 Power down all sled(s) in the server enclosure using OS commands or the
Baseboard Management Controller, and ensure the sled's power is off.
For power sleds in redundant configuration, you can remove and replace
the power sled without shutting down the compute sleds in the enclosure.
See Table 3-1 for the power sled maintenance conditions.
2 Locate the power sled to be removed or the power sled that contains the
failed power supply module. If a power supply module is faulty the status
indicator lights up amber.
3 Wait one minute and then verify that the indicators on the enclosure and
power sled are extinguished.
4 Pull up on the power sled release latch at the bottom of the sled to
disengage the sled from the server enclosure. See Figure 3-8.
5 Using the handle, slide the sled out of the enclosure. See Figure 3-8.
Installing System Components
199