APC SGI 15000 RAID - Manual (Page 138)

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8.7 Continuous Operation During Replacement
Depending on how the subsystem is set up, if a disk unit fails, it can normally be replaced without
interrupting the use of the system.
8.8 Replacing a Module
Warning Whenever replacing a module NEVER leave an EMPTY bay in the rear of the enclosure, obtain a
replacement before removing the problem part.
Please refer to Chapter 6, ”Drive Enclosure Installation” for information on the initial installation of the
plug-in modules in the drive enclosure.
Warning Observe all conventional ESD precautions when handling drive enclosure modules and
components. Avoid contact with Backplane components and module connectors, etc.
8.8.1 Power Cooling Modules
Warning Do not remove covers from the Power Cooling module (PCM). There is a danger of electric shock.
Return the PCM to your supplier for repair.
Warning To ensure your system has warning of a power failure please disconnect the power from the
power supply, by either the switch (where present) or by physically removing the power source,
prior to removing the PCM from the enclosure/shelf. Do not remove the faulty PCM unless you
have a replacement unit of the correct type ready for insertion. The system must not be run
without all units in place.
If a power supply unit or its fan is faulty, you must replace the whole PCM. You must not take any longer
than 5 minutes to replace this unit to prevent the enclosure from over-heating.
As there should always be two (2) PCMs installed, you can continue working while replacing the faulty
module.
To remove an AC PCM/Cooling Module- Handle Model:
Warning Do not remove the faulty PCM/Cooling module unless you have a replacement unit of the correct
type ready for insertion.
If a power supply unit or its fan is faulty, you must replace the whole PCM/Cooling module.
As there should always be two PCMs installed, you can continue working while replacing the faulty
module.
1 Make sure you identify the faulty PCM correctly from the two modules installed.
2 Lift latch which secures the power supply cord.
3 Switch off and disconnect the power supply cord.
4 Lift the PCM handle to the open position to cam the PCM out of the enclosure.
5 Grip the handle and withdraw the PCM.