I just got two stange 'errors'.
The first happened when the device was sitting idle for a few minutes, The top red led was blinking and the lower right green led was on. But I could normally operate the device.
I did a shutdown and then during shutdown it stopped with the bottom right and left low green leds on.
A reset 'cured' the problem.
Two more error codes for the list? Unfortunately I do not know what they indicated, at least nothing permanent ...