That doesn't look like a standard HMI error message, so I guess that somebody programmed it in. If this is on a system that has been working correctly I would look for a phase sequence relay, I would guess that it has gone faulty. If it is a new system, I would change the phase sequence because the panel doesn't like it the way it is now. Phase sequence is typically important if you have 3 phase motors, they try to run backwards if the phases are reversed.