hi
these two leds lit together indicate that the controller is in a i be dead scenario. The controller has encountered a major fault and shutdown, clearing it's memory for good luck as well. Thing to check
assuming that you have already flashed the controller to start withare
the revision level of the firmware, one revision of 11, can't remember which will produce this problem if the power is cycled rapidly to the rack.
Have you any message instructions running, if so don't pull the connection out, e.g. dh+ or ethernet cable. This was fixed by revving the firmware also.
Too many messages down the rs232 port....if you can solve this let me know, as this is driving us crazy. It will fault and shut the plant down.