Attention: The fans in the power supplies draw in fresh air and force out hot air.
The power supplies are hot-swappable and redundant; however, if the fans in one
power supply fail, you must replace the entire failed power supply within 72 hours to
maintain redundancy and optimum cooling. Do not remove the failed power supply
until you have the replacement power supply. When you do remove the failed
power supply, be sure to install the second power supply within 10 minutes to
prevent any overheating due to the interruption to the air flow that cools the storage
subsystem.
Do not run the storage subsystem without adequate ventilation and cooling,
because it might cause damage to the internal components and circuitry.
To replace a power supply, complete the following steps.
Attention: To prevent damage to the storage subsystem components from
overheating, replace a failed power supply within 10 minutes of removal. If replacing
it will take longer than 10 minutes, stop all I/O activity to the storage subsystem and
turn off the power until you complete the replacement.
(L001)
1. If necessary, use the DS Storage Manager software to print a storage system
profile.
2. Read the safety information that begins on page xiii and “Best practices
guidelines” on page 5.
3. Did the Recovery Guru direct you to replace a failed power supply?
v Yes: Go to step 4.
v No: Run the Recovery Guru to identify the failed component, and then go to
step 4.
4. Unpack the new power supply. Save all packing material in case you have to
return the failed power supply.
Note: The new power supply comes with an instruction sheet and label sheet.
The instruction sheet provides instructions for placing the correct labels
on the power supply to mark the LEDs correctly. The label sheet
contains the peel-off labels that you actually place on the power supply.
5. Using the information on the instruction sheet, place the labels on the power
supply to correctly mark the LEDs.
6. Turn off the power switch on the new unit.
7. Check the fault LED to locate the failed power supply. If a fault is detected, the
amber fault LED is lit.
8. Make sure that the OK to remove LED is lit. Do not remove the power supply if
the LED is off. For more information about the OK to remove LED, see “OK to
remove LED” on page 93.
Chapter 5. Replacing components 115
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