What does it mean when the Fault Icon flashes on the LCD screen while using the USB ports?

A flashing Fault Icon indicates a USB fault condition such as low battery voltage, overload, or short circuit, and the USB Ports will automatically shut down. Disconnect the USB-powered device, press the USB Power Button to turn off the ports, and allow the unit to cool for several minutes before trying again. Ensure the total draw of all USB devices does not exceed 2.1A (5V each).