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I have a Miller Dial Arc HF AC / DC 12.4 KW 200 /230 60 HZ Serial # JGO 85495 I bought it about 1985 and have owned it for over 30 yrs it has served me well. Mostly thin wall 4130 tubing stainless .035 exhaust tubing and aluminum components for aircraft parts fabrication. Both for amateur and certified aircraft.
In the Manual for my welder.
On page 20 PDF File a depiction of the Hi Frequency selector switch is shown, it has a Start position with the switch up, a middle Off position, and a down Continuous position. When switched in the past there was a definite click, I assume it is a relay closing when switched from start to continuous in either direction. It currently is in the Continuous position and will weld aluminum fine, but will not switch back to Start. I have checked the toggle switch and it seems to work and have continuity, I suspect it might be the relay, on my machine the relay is a Porter Brumfield KUP11A55 with details as follows. Mine says 24Volt 50/60HZ Industrial Rated 3A 1/2 HR 600VAC 1/3 GP 120V AC Made in Mexico. But depicted on page 38 PDF File of the Manual is a break down of these relays, and I think the one that controls this function might be the #9 relay that is not working, Its PT# calls out for CR3 006393 relay 24VAC DPDT 10A/120VAC in the manual.
The difference between the two could easily be the serial # when produced as it says when ordering parts to make sure the correct serial number is included, I am not an electrician, and am just guessing, so any help would be much appreciated as I have no idea where to take it for repair. I am located in the Portland Oregon Area thanks in advance for any helpful comments. Dave
In the Manual for my welder.
On page 20 PDF File a depiction of the Hi Frequency selector switch is shown, it has a Start position with the switch up, a middle Off position, and a down Continuous position. When switched in the past there was a definite click, I assume it is a relay closing when switched from start to continuous in either direction. It currently is in the Continuous position and will weld aluminum fine, but will not switch back to Start. I have checked the toggle switch and it seems to work and have continuity, I suspect it might be the relay, on my machine the relay is a Porter Brumfield KUP11A55 with details as follows. Mine says 24Volt 50/60HZ Industrial Rated 3A 1/2 HR 600VAC 1/3 GP 120V AC Made in Mexico. But depicted on page 38 PDF File of the Manual is a break down of these relays, and I think the one that controls this function might be the #9 relay that is not working, Its PT# calls out for CR3 006393 relay 24VAC DPDT 10A/120VAC in the manual.
The difference between the two could easily be the serial # when produced as it says when ordering parts to make sure the correct serial number is included, I am not an electrician, and am just guessing, so any help would be much appreciated as I have no idea where to take it for repair. I am located in the Portland Oregon Area thanks in advance for any helpful comments. Dave
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