I have a Hitachi Seiki VK-45 machining center and can tell you that the controls are VERY similar if not identical. I actually use a VM40 instruction manual because it is more detailed and written better that the one I have for the VK-45. All that said, my machine does this same thing and I have found that it is more likely to do it if I get in a hurry to turn it on. I think those old controls take a bit to boot. If I turn on the main breaker and walk around and hit the power button right away I will have this error. If I wait after turning on the main breaker about 15 seconds before I hit the power button, much less likely to see this error. When I do get it, I just power off, power on again and it is fine.