Ah thanks mate now I understand what you meant. This is why I haven't come across this as, most of the time if you use a 3 phase step down transformer(ie you use the 3 legs), which we always do, you don't have these issues. Cheers mate.

Thanks for keeping us posted. Please let us know how you make out on Monday...

Go Nationals!

Before I changed any wires around I double checked my voltage controller to controller, the cars are in phase without having moved any wires. Don't know what the hell is going on.

Boards should be here tomorrow, before changing them out I'll check the controllers for correct phasing. Around the lunch table we came to the conclusion that there is a building power problem.

I changed all ribbon cables with no effect on my problem, so I called MCE again. The troubleshooter had me check for a loss of communication on the swing panel of the group controller, turns out I was in fact losing communication.

MCE has two different types of "receiver-driver" chips on their communication (RS?) boards. Looks like the problem car and the dispatcher have the weak version of this chip and my nice elevator has the good version of this chip.

To eliminate communication loss, there are two jumpers on each communication board; they take a resistor to ground at the end of the communication link. I moved the jumpers on both cars, my communication is now good and my problem disappeared.

So, I ordered new chips for both cars (a few bucks a piece).