Dell PowerVault MD3000i - Manual (Page 64)

64
Installing Enclosure Components
Removing and Installing the Power
Supply/Cooling Fan Module
Your enclosure supports two separate modules containing an integrated power
supply and two cooling fans per module. While the enclosure can operate
temporarily with only one functional power supply, both cooling modules
(with two fans each) must be present for proper cooling. Three of the four
fans must be operational for the enclosure to avoid overheating.
NOTICE:
A single power supply/cooling fan module can be removed from a
powered-on enclosure for a maximum period of 5 minutes. Beyond that time, the
enclosure may automatically shut down to prevent damage.
Removing a Power Supply/Cooling Fan Module
NOTICE:
Power supply/cooling fan modules are hot-pluggable. Provided one
power supply/cooling fan module is functioning normally, you can remove or
replace the other while the enclosure is powered on.
NOTE:
If you remove a fully functioning power supply/cooling fan module, the fan
speed in the remaining module will increase significantly to provide adequate
cooling. The fan speed will decrease gradually when a new power supply/cooling
fan module is installed.
1 Turn off the power supply you intend to remove using the on/off switch.
2 Using a Phillips-head screwdriver, loosen the two captive screws securing
the power supply/cooling fan module in the bay (see Figure 3-6).