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Miller dynasty dx 300 that began throwing help code 7, which is too high of voltage. The voltage reads 246 volts coming in to the welder. It keeps blowing diode pack pm2. Any ideas what could be the problem?

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The Voltage refered to is the Arc Voltage not the input voltage, for dip transfer the arc voltage needs to be 18-20v for spray transfer try 25-38volts both depending an the WFS setting. arc voltage is set on the voltage control dial. lets know how this turns out.#
Ken

Posted on Feb 02, 2010

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Help code 24 ?


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Hi, starts to weld fine after a few seconds hi


It sounds like you need to change out your SCR chip on your motherboard; Miller makes one that i have installed on all our 350xl's, I don't have the number on hand but i can get it for you tomorrow.

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I have a miller dynasty inverter tig welder   It has a help code that comes on when I turn it on the code is p-2


From the user manual for a generic dynasty model welder:
2 Help 2 Display
Indicates an open in the thermal protection
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Contact a Factory Authorized Service
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So you could have anything from a broken or disconnected wire to a bad thermal switch.

You can get user manuals specific to your welder at www.millerwelds.com

Rank this answer please,
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