I have only encountered one abnormality that will cause a fault 7, I have seen this fault 3 times during my career. On some software versions, if the controller sees a
Ld input before the car transfers to delta on a wye delta system, the fault 7 will occur. all three times the problem was the valve was not sized correctly and the car started to move while the starter was still in the wye mode. you can experiment with this by giving the car an ld input while still in wye, i have tried this on numerous 1230 units, some will fault 7, some will not, i am assuming it is a software version issue. elmcannic, i have not ran across a Mode B error, what is it.
