HP Disk System 2300 HP StorageWorks Disk System 2300 User's Guide(This manual - Page 123

Power Supply, Tools, Procedure, Disconnect the power cord from the power supply.

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Removal and Replacement Power Supply Replace a power supply as soon as possible when troubleshooting indicates a power supply failure (see "Isolating Causes" in Chapter 4). If a power supply fails, the remaining power supply provides proper voltage to the disk system. However, if the remaining power supply fails before the first power supply is replaced, the disk system will turn off. The power supply fan may continue to operate even when a power supply fails. You do not need to turn off the disk system to replace a power supply. Follow ESD procedures whenever possible. Tools ESD wrist strap (no hand tools are required to perform this procedure). Whenever possible, follow ESD procedures. Procedure Caution Do not remove a power supply from an operating product until you have the replacement and are ready to install it. An empty slot will cause uneven cooling and eventual overheating. The power supply may be hot to touch. 1 Disconnect the power cord from the power supply. 2 Loosen the thumbscrews on the power supply handles (A and B in Figure 57). 3 Rotate the handles out to disengage the power supply from the midplane. 4 Pull the power supply out of the chassis. Support the far end of the supply with your free hand as it clears the chassis. Replace the power supply immediately if the product is in use (see next step). Removal and Replacement 123

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Removal and Replacement
123
Removal and Replacement
Power Supply
Replace a power supply as soon as possible when troubleshooting indicates a
power supply failure (see “Isolating Causes” in Chapter 4). If a power supply
fails, the remaining power supply provides proper voltage to the disk system.
However, if the remaining power supply fails before the first power supply is
replaced, the disk system will turn off.
The power supply fan may continue to operate even when a power supply fails.
You do not need to turn off the disk system to replace a power supply.
Follow ESD procedures whenever possible.
Tools
ESD wrist strap (no hand tools are required to perform this procedure).
Whenever possible, follow ESD procedures.
Procedure
Caution
Do not remove a power supply from an operating product
until you have the replacement and are ready to install it.
An empty slot will cause uneven cooling and eventual
overheating.
The power supply may be hot to touch.
1
Disconnect the power cord from the power supply.
2
Loosen the thumbscrews on the power supply handles (A and B in Figure 57).
3
Rotate the handles out to disengage the power supply from the midplane.
4
Pull the power supply out of the chassis. Support the far end of the supply
with your free hand as it clears the chassis.
Replace the power supply immediately if the product is in use (see next step).