I'm afraid is not a very good error message to see on the screen as it could be quite deeming for the controller ... this ERROR appears when the board (the main controller) is corrupted. It could be down to the software no longer running on the controller and is corrupted .. I would not exclude that the corruption could have been caused by a hardware failure...
Your options are:
1) Restart the controller and hope for a good start-up and operation
2) If you still get the error, I would try and restore the original software on the controller (if you have this from the manufacturer)... If this works it excludes the possibility of a hardware failure. It happened to me other times that re-establishing the original software in the controller it cleared the fault...
3) If the above doesn't work I'm afraid you have no other option but replacing the controller.
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