Hot-swap power supply installation/removal - (NF 8500R - Type 8681)
Hot-swap power supply installation/removal
Overloading an electrical circuit breaker is potentially a fire hazard and a shock hazard under certain conditions.
To avoid these hazards, adhere to the instructions in the following statements.
- If you are connecting to a 100-127 V AC power source, connect each power cord to a separate branch circuit.
- If you are connecting to a 200-240 V AC power source and the branch circuit breaker rating is:
- 13 amps or less, connect each power cord to a separate branch circuit.
- 14 amps to 19 amps, do not connect more than two power cords to the same branch circuit.
- 20 amps or greater, you may connect up to three power cords to the same branch circuit.
The server comes with three power supplies, three 220 V AC power cords, and three 110 V AC power cords
Be sure to select the appropriate power cord voltage for the server environment.
All three power cords must have the same voltage.
If you connect the three:
- 220 V AC power cords to the power supplies, the three power supplies support redundancy and hot-swap capability.
- 110 V AC power cords to the power supplies, the three power supplies do not support redundancy if the system configuration exceeds any of these conditions:
- More than six processors
- More than 24 memory DIMMs
- More than eight PCI adapters
For servers with redundant power, the loss of a single power supply will not affect the server operation.
Replace a power supply that has failed as soon as convenient to help maintain the redundant power and cooling capability.
When the AC power LED is on, the DC power LED is on, and the System Power light on the operator panel is on,
the power supply has failed.
See 'Hot-swap Power supplies' for the location of the DC power LEDs.
See 'Power supply LED errors' for more information on the DC power LEDs.
-Attention- To ensure proper server operation, be sure to
connect all three 220 V AC power cords or all three 110 V AC power cords to the power supplies.
Note: The server also comes with three 220 V AC power cords for connection to the server rack power distribution unit (PDU).
Refer to IBM Netfinity Rack Power Distribution Unit (PDU) Installation Instructions for additional information on installing a PDU.
See 'Installing the server in and removing the server from the rack enclosure' for additional
information on installing a server rack.
Refer to the following illustration while performing the steps in this procedure.
- The illustrations in this section might differ slightly from your hardware.
- You do not need to turn off the power to the server to replace hot-swap power supplies.
-1- Handle release latch
-2- Power supply
To replace a hot-swap power supply:
- Remove the power supply:
- Unplug the power cord from the power supply and the electrical outlet and,
if necessary, remove the power supply cord from the strain-relief bracket.
- If a strain-relief bracket is attached to the power supply, remove the
screw on the back of the power supply (lower right side), and remove the
- Press the release latch -1- on the handle -3- on the
power supply -2-.
- Lift and fully extend the handle on the power supply.
Then, slide the power supply out of the chassis.
Refer to the power supply option documentation for complete instructions on
proper handling and disposal of a defective power supply.
- Replace the power supply:
- Remove the new power supply from the static-protective package.
- Touch the static-protective package containing the power supply to any
unpainted metal surface on the server.
Then, remove the power supply from the static-protective package.
- Place the handle -3- on the power supply -2- in
the open (up) position, and slide the power supply into the chassis.
If necessary, lower the handle slightly to avoid the I/O housing assembly;
then, continue inserting the power supply into the bay until it stops.
- Press the handle down to seat the power supply n the bay.
This places the power supply in the locked position.
- Reconnect the power cord to the power supply and the electrical outlet (if removed).
- Remove the new strain-relief bracket from its package and install it on the power supply cord.
Note: If a new strain-relief bracket did not come with the new power supply, attach the
strain-relief bracket that you removed in (above) step 1b on the new power supply.
- Verify that the AC power light and the DC power light are lit, indicating that the power supply is
See 'Power supply LED errors' for details.
See 'Hot-swap Power supplies' for the location of the AC and DC power LEDs.
- If you have other options to install or remove, do so now; otherwise, continue with
'Completing the installation'.
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