Can a server have its type of input power changed (AC to DC, DC to AC) after it has left the factory ? No ! (Doc ID 1961021.1)

Last updated on JANUARY 16, 2015

Applies to:

Sun Hardware - Generic - Version All Versions and later
Information in this document applies to any platform.

Symptoms

A Sun Oracle server,  equiped with Power Supply Units (PSUs) that require AC input power, can only be connected to input power if AC input power is available.  
A Sun Oracle server,  equiped with Power Supply Units (PSUs) that require DC input power, can only be connected to input power if DC input power is available.


AC stands for Alternating Current. This is the type of utility power that we all have at home, and what we find in most data-centers. Voltages can range from 100Volts AC (Americas) all the way up to 415Volts AC (3-phase Europe).
DC stands for Direct Current. This is the type of power used internally by electronic equipment and some data-centers,  and is typically seen in Telecom data-centers. Voltages internal to the equipment are seen in a multitude of values. The external DC voltage used is normally -48Volts DC.

Changes

If Sun Oracle servers move from one environment to the next, customers could face the situation that in the new location the available input power does not match the type of input power that the server requires.
Occasionally Sun Oracle servers are sold  to customers with PSUs that do not match the type of input power available at the server's intended location.

Looking at the Sun Oracle servers, the obvious step to fix the issue the customer is facing, is to swap out all of the server's PSUs and put in the PSUs that match the type of available input power. This PSUs swap however is highly illegal, strictly forbidden and should never happen. Changing the type of PSUs in a server it strictly forbidden per the server's Safety and compliance guide.

Cause

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