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Precautions when replacing the Power Unit
The procedure for replacing the Power Unit is different for each storage
system model, so be sure to follow the instructions for the appropriate
storage system. Observe the following guidelines when replacing a Power
Unit.
•
Complete the Power Unit replacement within 10 minutes. Otherwise, an
abnormal rise in temperature can power off the storage system.
•
For storage systems that have the Power Saving/Power Saving Plus
option, removing and inserting a Power Unit during drive spin-up might
prevent the Power Unit from recovering fully. If this occurs, wait for all
the drives to spin up, and then remove the Power Unit from the storage
system, wait at least 30 seconds, and reinsert it.
•
If the Power Unit encounters problems when you replace the Fan
Module, it does not mean the Power Unit is faulty and must be
replaced. Remove the Power Unit and then re-insert it to see whether
the problem is resolved.
•
If the Power Unit and another module fail at the same time, replace the
Power Unit first. Otherwise, an abnormal temperature condition can
occur.
Replacing the Power Unit on CBXSS/CBXSL/CBSS/CBSL
Controller Boxes
To replace the Power Unit on a CBXSS/CBXSL/CBSS/CBSL Controller Box:
1. Confirm the status of the following LEDs:
-
Red P-ALM LED on the Power Unit to be replaced is ON.
-
Green P-RDY LED on the Power Unit not to be replaced is ON.
NOTE: If the red ALM LEDs on the Power Unit of both controllers are ON,
visit the HDS Support Portal at portal.hds.com.
2. Hold up the latch on the Power Unit cable holder to release the lock, and
then slide the cable holder forward.
3. Disconnect the power cables connected to the Power Unit to be replaced.
You cannot remove the Power Unit with the power cable connected.
4. Wait at least 30 seconds before installing the new Power Unit.
NOTE: If you do not wait at least 30 seconds, the Power Unit might not
recover normally. If you fail to wait at least 30 seconds and the Power Unit
does not recover, remove the Power Unit, wait at least 30 seconds, and
then reinstall it.
5. Open the lever toward you (
Unit latch inward ( ). When the lever is opened completely, the Power
Unit can be removed by pulling it forward,
6. Hold the Power Unit with both hands, then pull and remove it.
7–2
) while using your thumb to press the Power
?
Replacing a Power Unit
Hitachi Unified Storage Hardware Service Guide
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