Supermicro 4020A-8R, User Manual

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A+ Server 4020A-8R User's Manual
6-5 Power Supply
The AS 4020A-8R has a triple redundant 760 watt redundant cooling power sup-
ply that consists of three 380W power modules. All three modules are active and
share the load of the system (up to 760W max.). If any of the three modules fail,
the other two will continue to provide up to 760W of power and allow the system
to continue running without interruption.
The power supply modules have an auto-switching capability that enable them to
automatically sense and operate with 100 or 240 volt inputs. The power modules
are PFC (Power Factor Correction) compliant.
Power Supply Failure
If a power supply module fails, an LED in the control panel as well as one on the
back of the failed power module will illuminate to notify you of a power failure.
Replacing the Power Supply
1.Accessing the power supply
You do not need to power down the system to replace a power module on the
4020A-8R. Power supply modules can be removed from the back of the chassis;
access to the inside is unnecessary.
2. Removing the power supply
First, unplug the power cord from the failed power supply module. Then press the
locking tab on the module and pull the unit completely out.
3. Installing a new power supply module
Replace the failed unit with another unit having the exact same part number (PWS-
0050M). Gently but fi rmly push the new unit all the way into the open bay. Secure
it to the chassis using the locking tab. Finish by replacing the chassis left/top cover
and then plugging the power cord back into the new module you just added.