Lenovo PC 330 (English) Installation and User Guide - Page 119
Installing a hot-swap redundant power supply, computer for reference.
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The hot-swap redundant power supply adds a second source of power to the server. When the server is populated with two hot-swap redundant power supplies, it can withstand a power loss from either power supply. This helps you avoid significant interruption to the operation of the system when a power supply fails. You can replace a hot-swap redundant power supply without turning off the server. Note: To maintain the EMI integrity and cooling of the server, install a new hot-swap redundant power supply as soon as you remove the failing one or cover the other bay with a shield if you just use one module to provide power. Some server models come with only one power supply. You can purchase a hot-swap redundant power supply option from Lenovo. CAUTION: Hazardous moving parts. Keep fingers and other body parts away. CAUTION: Never remove the cover on a power supply or any part that has the following label attached. Hazardous voltage, current, and energy levels are present inside any component that has this label attached. There are no serviceable parts inside these components. If you suspect a problem with one of these parts, contact a service technician. Installing a hot-swap redundant power supply Attention: Do not open your server or attempt any repair before reading and understanding "Safety information" on page iii and "Guidelines" on page 67. This topic provides instructions on how to install a hot-swap redundant power supply. Before you begin, print all the related instructions or ensure that you can view the PDF version on another computer for reference. Notes: • Your hot-swap redundant power supply might look slightly different from the illustrations in this topic. • Use any documentation that comes with the new hot-swap redundant power supply and follow those instructions in addition to the instructions in this topic. To install a hot-swap redundant power supply, do the following: Chapter 6. Installing, removing, or replacing hardware 107