Dell EqualLogic PS4210 Hardware Owner's Manual page 38

PS4210 Hardware Owner's Manual
Item LED Color
DC
1 Green
power
2 Fault Amber
AC
3 Green
power
Under normal conditions, the AC and DC power LEDs are lit at the same time.
Removing a Power Supply and Cooling Module
Although an array can operate with only one working module, if a power supply and cooling module fails, you
must replace the module as soon as possible. For proper array cooling, do not remove a failed module until you
are ready to replace it.
You can remove a power supply and cooling module from an array without affecting array operation if the
second module is installed and functioning. However, to maintain proper airflow in the array, a power supply
and cooling module must be replaced within five (5) minutes of removing it. Otherwise, if possible, cleanly
shut down the array before removing the module, as described in
page 4
.
How to Remove a Power Supply
Wear electrostatic protection when handling a power supply and cooling module. See
page 1.
To remove a power supply and cooling module:
1. Turn off the power switches on the power supply and cooling module.
2. Disengage the hook-and-loop fastener from around the power cable.
3. Remove the power cable.
4. With your right hand, hold the handle and push the orange release latch to the right with your thumb.
5. Pull the module from the slot, as shown in
32
Table 8: Power Supply LED Descriptions
State
ON—Normal operation. Power supply is connected to AC power and the power
switch is on. The power supply module is supplying DC power to the array.
OFF when any of these conditions is true:
• The power switch is off.
• The power supply is not connected to AC power.
• A fault condition is occurring (item 2).
For a list of warning or critical level faults, see the Dell EqualLogic Group
Manager Administrator's Manual.
ON—Fault detected.
OFF—OK.
Blinks briefly when power is first turned on to the power supply module.
ON—Power supply module is connected to a source of AC power whether or not
the power switch is on.
OFF—Power supply module is completely disconnected from any source of AC
power.
Figure 27.
4 Maintaining Power Supply and Cooling Modules
Shutting Down and Restarting an Array on
Protecting Hardware on