Miller 180sd help

[supraling]

I just bought a used miller syncrowave 180 sd. The problem im having is starting an ARC in DC using HF. I have to scratch start it with the foot pedal press down. No problem starting with HF in AC setting. I also notice that the cooling fan never turned on even if i weld for a long time. Any help would be great thanks

[cruizer]

serial #, now we harp on serial#'s is that stuff changes inside of this units, and newer models. Since, I'm looking at a technical diagram, that you don't have access too, I really need all the information from you to come up with a solution.

[supraling]

Sorry for the late reply the serial number on the machine is LE228931