Before shutting off power to the SSA, press or tap on its OFFLINE/RESET button for less than one second.
The CPU LED changes from solid green to blinking between green and amber, indicating that the SSA is shutting down. At the end of the shutdown routine, the CPU LED changes to a sequence of 67% amber and 33% off, indicating the system is in a halt state. At this time it is safe to restart the SSA.
When you initiate a controlled shutdown with the OFFLINE/RESET button, you have 60 seconds from the time the CPU LED starts flashing amber/off until the device automatically restarts.