What are the exact criteria for a phase rotation warning from a VM-3P75CT? The online manual has only a one liner which reads: “Phase rotation: (4) Enables a phase rotation warning. Disabled by default.”.
Ok. For starters. The fact that it is disabled by default is weird IMHO. Also. I have no idea that that (4) is supposed to point to. Unknown to me.
Anyway. So if I enable this warning, and I get a warning, what does that mean? Let’s say that the grid is not setup in the usual L1-L2-L3 configuration. Wires are brown, black and gray as usual. So let’s take L1-L3-L2 as example. Will I get a warning just because the meter sees an unusual setup? Meaning. Does it expect L1-L2-L3 as a requirement?
Yes of course. It is installed right after the mean switch and configured as grid meter. All three Multi’s are correctly wired.
The Mult’s are of course correctly programmed with the MKIIi interface and flashed with the latest firmware. Configuration uploaded to all inverters. The VM-3P75CT.also has the latest firmware. Same for the Cerbo GX MKII or else it will fail to connect via CAN (known firmware limitation).
I myself don’t have this problem. A friend of mine has with a new setup. I looked at it and basically checked all wiring and connection. Seems to works fine. With the exception of the AC Loads value in VRM.
My friend wants to swap L2 and L3 but I would first like to know if that would actually solve the problem with the phase rotation warning. And not introduce other issues. It’s OK to re-configure the Multi’s. The configuration for the inverters for L2 and L3 are now basically swapped.
Also. If everything is setup correctly. I’m absolutely positive that no wires on his side are somehow swapped. Then why do we get the phase rotation warning? Does that mean Victron can’t work with L1-L3-L2? AI said so.