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agb1758c
Junior Member
Last Activity: 09-21-2022, 08:09 PM
Joined: 08-23-2022
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  • agb1758c
    replied to Miller Dynasty 280 DX
    Seems to be running correctly, it was updated, cool mate pump motor replaced. Ran for over a hour with no error codes. Thanks for the information Bushytails on the center tapped ground, I was afraid of something being wrong with welder.

    Thanks everyone for the help!
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  • agb1758c
    replied to Miller Dynasty 280 DX
    The motor replaced for the coolmate, it is now working and pumping when connected to separate power source. The aux. plug on the welder is showing 1) Ground to positive 76 to 98 vac, 2) Ground to neutral 76-98 vac, 3) Neutral to positive 133.5 vac. For some reason welder is feeding power to neutral...
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  • agb1758c
    replied to Miller Dynasty 280 DX
    The pump motor burned out. I believe it shorting out is what caused the problem inside main unit. I am waiting on new motor now. When hooked up to power by itself power inside cool mate matches input power from separate power source....
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  • agb1758c
    replied to Miller Dynasty 280 DX
    The error codes 1.4.5 (Input under voltage) and 1.5.2 (CPS output over current). After doing update, it did change the output voltage to 47 from 59 (positive to ground and neutral to ground) and stopped the rapid change of voltage between positive and neutral, now neutral to positive shows steady 0.0...
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  • agb1758c
    replied to Miller Dynasty 280 DX
    Went to Miller site, now have machine updated. After update the 115v plug is reading Positive to ground 47 volts ac, Neutral to ground 47 volts ac, positive to neutral 0 volts ac. There was some change after update....
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  • agb1758c
    replied to Miller Dynasty 280 DX
    I don't believe it has ever been updated. My son uses it in his business, I only get to see it when he has a problem with one of his machines. I will need to check with him.
    Quick update: I will check the current firmware and I have located the updated firmware from Miller. I will let you know...
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    Last edited by agb1758c; 09-03-2022, 10:04 AM.

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  • agb1758c
    started a topic Miller Dynasty 280 DX

    Miller Dynasty 280 DX

    I have a Miller Dynasty 280 DX with a 1.3 Cool-Mate, SN# MH270162301153U. I have been getting error codes 1.4.5 (Input under voltage) and 1.5.2 (CPS output over current). I have discovered the pump motor on the Cool-Mate does not work, gets hot so figuring internal short. Upon testing the 115 volt...
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