HP NonStop G-Series - Manual (Page 173)

OSM alarm appears on a power supply in either slot 31 or 32, consult your wiring diagram and the NonStop S-Series
Central Office Server Installation and Service Guide before replacing a power supply component.
1. Preparing to replace the power supply CRU -- The action directs you to the Replacement Guidelines and
Precautions help topic for guidelines and precautionary steps to observe before and during the CRU replacement.
2. After clicking Yes to confirm that you are ready to proceed with the replacement action:
•
OSM checks the peer power supply to verify that it is functional and can take over during the replacement.
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If the peer power supply is functional, OSM disables the battery associated with the power supply CRU to
be replaced.
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If these tasks complete successfully, a dialog box informs you that the power supply is ready to be replaced.
3. After replacing the power supply CRU, click Continue to complete the action. OSM verifies the status of the new
power supply. If it is functional, OSM enables the battery that was disabled earlier in the procedure.
If at any point during the procedure OSM finds problems that prevent the action from completing (or make continuing
unadvisable), a dialog box reports the problems that must be addressed before the CRU replacement can be safely
completed.
Replacement Guidelines and Precautions
Preparing to Replace the Power Supply
Perform these preparatory steps before you attempt to replace a power supply:
1. Review these important notes and cautions:
•
Before handling any CRU, obtain an electrostatic discharge (ESD) protection kit. Follow the directions on
the kit for replacing a CRU to prevent damage to system components.
•
Power cords might contain faulty connectors that, when touched, vibrated, or flexed, can cause intermittent
power or the loss of a processor.
•
Before replacing a power supply, visually check the power cord without touching the power cord. If the
power cord molding is elliptical rather than square, or if the power cord part number is TPN 064583, you
must replace the power cord offline with power cord TPN 421575 before you can replace the power supply.
For power cord replacement instructions, refer to the Support and Service > Service Procedures collection
of NTL. If you are replacing both the power cord and the power supply, install the replacement power cord
before installing the replacement power supply.
•
Handle with care -- the power supply weighs approximately 5.6 kilograms (14 pounds).
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Follow these standard operating practices when replacing CRUs:
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Replace only one CRU at a time. Attempting to replace more than one hardware component at a time
might cause serious system outages, processor halts, and connectivity problems.
•
Remove all jewelry and metal accessories, such as rings, watches, and necklaces, before working
with the equipment. These items can damage electrical equipment or result in personal injury.
•
Restrain any dangling items that can get caught in electromechanical equipment, such as long hair
and sleeves, before working with the equipment.
2. Unpack and inspect the replacement power supply. Use a flashlight to examine the pins on the power supply's
backplane connector for any damage. If any pins are bent or broken, you must order another power supply (or
have the backplane connector repaired or replaced) before continuing with this procedure. Refer to Avoiding
Connector and Backplane Damage During CRU/FRU Replacement in the Support and Service > Service
Procedures collection of NTL.
Removing the Power Supply
1. Remove the front panel from the power shelf.
2. Locate the power supply you are removing (power supplies are in slots 31 and 32). At this point, the LED above
the power supply you are removing might or might not be lit. This illustration shows an S7x000 processor
Power Supply 173