IBM N7800, Hardware And Service Manual

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Replacing a power supply on an N7000 series system
To replace a power supply in the system, you must perform a number of tasks in
order.
About this task
v
All other components in the system must be functioning properly; if not, contact
technical support.
v
The power supplies are redundant, and are hot-swappable and interchangeable.
v To prevent system downtime, replace only one power supply at a time.
Important:
You can configure the system with either a 110V AC power supply or a
220V AC power supply. For proper system operation, do not mix 110V and 220V
AC power supplies in your system.
Removing a power supply
To remove a power supply, you must follow the steps to identify the one you want
to remove, disconnect the power cord, and remove the power supply from the
chassis.
About this task
Attention: You must replace the power supply within two minutes of removing it
from the chassis. System airflow is disrupted and the controller module shuts
down after two minutes to avoid overheating.
Procedure
1.
Identify the power supply you want to replace, based on console error
messages or through the LEDs on the power supplies.
2. If you are not already grounded, properly ground yourself.
3. Turn off the target power supply and remove the power cord by completing
the following substeps, using the illustration for reference:
2
1
Figure 17. Removing the power supply
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IBM System Storage: N7000 Series Hardware and Service Guide