Replacing An Ac Power Supply - Lenovo NeXtScale n1200 Installation And Service Manual

Figure 33. Removal of an AC power supply
Step 1. Disconnect the power cord from the power supply.
Step 2. Grasp the handle and press the release tab down.
Step 3. Slide the AC power supply out of the power-supply bay and place it on a flat, static-protective
surface.
If you are instructed to return the AC power supply, follow all packaging instructions, and use any packaging
materials for shipping that are supplied to you.

Replacing an AC power supply

Use these instructions to install an AC power supply in the NeXtScale n1200 Enclosure. You can install an
AC power supply while the NeXtScale n1200 Enclosure is powered on.
Important:
• Use only power supplies of the same power rating or wattage in each chassis.
• Make sure the input power is phase-to-phase, or, phase-to-neutral, 100 to 127 volt AC nominal, 50/60 Hz
for low-line; or 200 to 240 volt AC nominal, 50/60 Hz for high-line power supplies.
• For 900-watt power supplies, if operating at low-line Vin (AC 100V - 127V), the power output can only be
up to 600-watt. Up to 900-watt if operating at high-line Vin (AC 200V - 240V).
• You can only use 1300-watt power supplies with high-line Vin (AC 200V - 240V).
• Make sure that the power cord is not connected to the power supply when you install the power supply in
the chassis.
• Do not remove the velcro strap from the rear of the power supply.
The following tables provide an indication of the quantity of nodes that can be installed in a chassis for
specific processor types assuming nodes have all DIMM slots, PCIe slots, and hard disk drives populated.
The tables are based on 900-watt or 1300-watt power supplies and the indicated power settings. However,
when building a NeXtScale n1200 Enclosure solution, you are required to validate the power requirements for
your configuration using the latest version of the Power Configurator to ensure that the number of power
.
Chapter 4 Removing and replacing components
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