15WARNINGDO NOT remove the dummy cage for the Single Controller model.Doing so will disrupt the internal air flowInternal BackplaneAn integrated backplane separates the front and rear sections of the chassis. This circuitboard provides logic level signals and low voltage power paths. Thermal sensors and I2Cdevices are embedded to detect system temperatures and PSU/Cooling Module operatingstatus. This board contains no user-serviceable components.WARNINGAccessing the backplane board may lead to fatal damage of thesystem. Also, physical contact with the backplane board may cause electricalhazards.Front Panel ComponentsLED PanelUnified Storage System LED panel Expansion EnclosureLED panelThe LED panel can be located on the chassis ear. The LED panel contains Service LED (1),a power supply status LED (2), cooling module status LED (3), temperature sensor statusLED (4), System fault LED (5), Mute Service button (6), rotary ID switch (only expansionenclosure) (7). For details, please refer to LED Panel.WARNINGIf critical faults are indicated on the LED panel, verify the cause of the problemas soon as possible and contact your system vendor and arrange for areplacement module.
