Turning On Power to a Controller
From the front of the controller, press the power button on the left side of the controller. See for the location of
the power button.
An LED indicator on the controller power button indicates if power is supplied to the controller and if the
controller is operational.
In addition, the controller power supplies have an LED that shows whether power is present or whether a power
fault has occurred, as shown in and described in
Table 12: FS7500 Controller Troubleshooting – Power Supply LED
LED Color and Patterns
Description
Not lit
No power.
Green
When the controller is in standby mode (power connected but the
controller is not turned on), a green LED indicates that a valid AC
source is connected to the power supply, and that the power supply
is operational. When the controller is turned on, a green LED also
indicates that the power supply is providing DC power to the
controller.
Amber
Indicates a problem with the power supply.
Alternating green and
amber
See
Attaching the Controller Bezel
See
Attaching the Controller Bezel on page 26
.
Powering Down the Controller
To power down the controller, quickly press and release the power button. The controller writes any remaining
data in the cache to storage, and then executes a graceful shutdown (turns off power to the node). To turn on
power to the controller, press the power button again.
Caution:
Do not press and hold the power button to shut down the controller. If you press and hold the power
button to turn off the power, you could lose your data. Never power down both controllers at once.
36
EqualLogic FS7500 Installation and Setup
3 Power Connections