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Powcon 400ss welder

Low output and ticking sound

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Miller welder 330a/bp it will not weld in D/C straight or reverse no ark but will work in A/C its like there is very low volts I was welding and then could not strike a ark


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No or little ac output


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1 Answer

No welder output


Sounds like a control board problem, would much more info to diagnose.

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Well John Henery I'm new to this type of correspondence,but I'll give it a try!

#1 Disconnect from power & remove the 10 bolts holding the cover.(There should be diagams by each of the 3 jumper sets to be changed.)
#2 Standing at the front look to the rear left ,and you should see 4 studs. (Dotted line=buss jumper)
x----x x----x x x----x x
240V 480V

#3 At the front center down low there will be 4 more studs.
x----x x----x x x----x x
240V 480V

#4 On the right rear there is a vertical board with 10 studs.
x x x x x x
| | |
| | |
x x x x--------x x
| | |
| | |
x x x x--------x------x
|
|
x x
(240V) (480V)


As far as your no power problem look at the main power switch. Of the wires that go to the welder, 3 will go to the power board, and 2 to the control board. When you hook the power cord to the house power you need to make sure to use the 2 cord conductors that will also feed the control board.

I do have an operator's manual for a 300SM, contact me at blandt101@att.net ,and I'll get you a copy.

Tom

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1 Answer

Ticking sound


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