Miller syncrowave 300 woes

[user name:]

I picked up 3 of these units not too long ago. I planned on keeping one for myself. Anyways I have one unit that is not giving any output voltage... Ive set it up for stick welding and cannot get it to run.

The unit powers on but makes some sort of buzzer noise (maybe a contactor issue?) for about 3 seconds then the noise stops. the fan comes on and the power light comes on.... anyways I made some videos so someone may recognize the issue!?

http://s530.beta.photobucket.com/use...01305.mp4.html

http://s530.beta.photobucket.com/use...65822.mp4.html

this is one working correctly with all the similar settings and leads anyways its 1/16" 7014 rod lol...

http://s530.beta.photobucket.com/use...65822.mp4.html

[Dipsomaniac]

I would sure like to see and hear your machine with the AC/DC switch in the AC position...

[user name:]

I would sure like to see and hear your machine with the AC/DC switch in the AC position...

It did the same thing upon startup in the ac position.

[cruizer]

If its a buzz its just a contactor. Usually dust in the shunts. Just take the coil part of it apart and clean it.

[user name:]

If its a buzz its just a contactor. Usually dust in the shunts. Just take the coil part of it apart and clean it.

could that be the reason im not getting any voltage output? also would that explain why its a loud buzz then after about 3 seconds it stops?

[user name:]

? anyone