Xantrex SW 2512

Hello all, I have previous experience in repairing all SW inverters but now this one has me hunting.

Its error led is flashing, the cursor (bottom line) on the display will not move.
It moves when im in the generator menu but when i try start the inverter it wont move.

In the errors menu I have a Gen over/under speed error. How does one clear this error so that the inverter will start.

I have check the CPU's with other in my stock but still no luck !!!!!!!!


ANY IDEAS