Turning On Power to a ControllerFrom the front of the controller, press the power button on the left side of the controller. See for the location ofthe power button.An LED indicator on the controller power button indicates if power is supplied to the controller and if thecontroller is operational.In addition, the controller power supplies have an LED that shows whether power is present or whether a powerfault has occurred, as shown in and described in Table 12.Table 12: FS7500 Controller Troubleshooting – Power Supply LEDLED Color and Patterns DescriptionNot lit No power.GreenWhen the controller is in standby mode (power connected but thecontroller is not turned on), a green LED indicates that a valid ACsource is connected to the power supply, and that the power supplyis operational. When the controller is turned on, a green LED alsoindicates that the power supply is providing DC power to thecontroller.Amber Indicates a problem with the power supply.Alternating green andamber See Table 9 on page 33.Attaching the Controller BezelSee Attaching the Controller Bezel on page 26.Powering Down the ControllerTo power down the controller, quickly press and release the power button. The controller writes any remainingdata in the cache to storage, and then executes a graceful shutdown (turns off power to the node). To turn onpower 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 powerbutton to turn off the power, you could lose your data. Never power down both controllers at once.36EqualLogic FS7500 Installation and Setup 3 Power Connections
