Dell DR4000 Owner's Manual - Page 74

Power Supplies, Removing a Power Supply

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Power Supplies Your system supports two 750 W redundant power supply modules. NOTE: The maximum output power (shown in Watts) is listed on the power supply label. Two power supplies are installed and the second power supply provides hot-swappable, power redundancy. In redundant mode, the system distributes the power load across both power supplies to maximize efficiency. When a power supply is removed with the system powered on, the full power load is picked up by the remaining power supply. NOTE: The system needs to run on both power supplies always, except when you replace a power supply module. Removing a Power Supply CAUTION: Many repairs may only be done by a certified service technician. You should only perform troubleshooting and simple repairs as authorized in your product documentation, or as directed by the online or telephone service and support team. Damage due to servicing that is not authorized by Dell is not covered by your warranty. Read and follow the safety instructions that came with the product. CAUTION: The system requires one power supply to operate the system normally. Remove and replace only one power supply at a time in a system that is powered on. 1 Disconnect the power cable from the power source. 2 Disconnect the power cable from the power supply and remove the system cables from the Velcro straps. NOTE: You may have to unlatch and lift the optional cable management arm if it interferes with power-supply removal. For information about the cable management arm, see the system's rack documentation. 3 Press the lever release latch and slide the power supply out of the chassis. See Figure 3-11. 74 Installing System Components

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74
Installing System Components
Power Supplies
Your system supports two 750 W redundant power supply modules.
NOTE:
The maximum output power (shown in Watts) is listed on the
power supply label.
Two power supplies are installed and the second power supply provides
hot-swappable, power redundancy. In redundant mode, the system
distributes the power load across both power supplies to maximize efficiency.
When a power supply is removed with the system powered on, the full power
load is picked up by the remaining power supply.
NOTE:
The system needs to run on both power supplies always, except when you
replace a power supply module.
Removing a Power Supply
CAUTION:
Many repairs may only be done by a certified service technician.
You should only perform troubleshooting and simple repairs as authorized in
your product documentation, or as directed by the online or telephone service and
support team. Damage due to servicing that is not authorized by Dell is not
covered by your warranty. Read and follow the safety instructions that came
with the product.
CAUTION:
The system requires one power supply to operate the system normally.
Remove and replace only one power supply at a time in a system that is powered
on.
1
Disconnect the power cable from the power source.
2
Disconnect the power cable from the power supply and remove the system
cables from the Velcro straps.
NOTE:
You may have to unlatch and lift the optional cable management arm if
it interferes with power-supply removal. For information about the cable
management arm, see the system’s rack documentation.
3
Press the lever release latch and slide the power supply out of the chassis.
See Figure 3-11.