My name is olalekan am a technician with nigerdock FZE NIGERIA.i want to how to correct help 21 from dynasty 350 welding machine.

Question edited for clarity.

Try straightening out the cables. Also, Clean and tighten all weld connections (see Section 9-1). Check for and remove anything blocking fan.

Dynasty 400 Maxstar 400

Miller Welding https://www.millerwelds.com > owners-manuals
Jan 16, 2017 - An error relate to the weld cables has been sensed. Straighten out or shorten weld cables. [SEE] [O.M.] See Owner's Manual: See. Section 9-4.
68 pages

https://forum.millerwelds.com/forum/welding-discussions/6001-dynasty-dx-%7Bhel%7D-%7Bp10

voltage control failure
have a technician test to find the fault

Use the best argon gas, ac polarity, continous frequency, tungstene must round and not sharp, rather use the zirconiated than the thoriated and make sure you got the size or diameter of tungstene according to your welding amps

When the display shows RMT it means that the torch trigger is depressed. If that is not the case then the trigger might be bad or shorted.
http://www.millerwelds.com/om/o245729c_mil.pdf

Yes the HF can be adjusted. Also many other things can be controlled to improve the ending arc. See section 6, page 38. https://www.millerwelds.com/files/owners-manuals/O216869AN_MIL.pdf

Wow what a great machine. You have so many options that you should be able to control the ending arc. Yes, you should be able to adjust the intensity of the HF. Also if you use the Sequencer Control, you should be able to finish the weld in a slope manner. I am including the owners manual. Operation starts on page 38. Miller has a team of welding engineer that will be able to help you set up your machine. Wish I had one.

According to my technical manual a help 11 code indicates that the output selector is not in the correct position. What this means is that say you have your aluminum piece all ready to be welded, you lean over and make a little adjustment to your balance and this code pops up, its because your output selector switch (the big handled 3 position rotary switch on the fron of the machine) is in the wrong position. Either DCEN or DCEP when you in fact need AC.
I see this all the time on the dynasty 200's we have in the lab when people are set for DC straight current welding and try to adjust AC parameters. Such as balance and frequency.


Throwing this code does NOT mean there is anything wrong with the machine and I would not recommend bringing it somewhere for someone to look at. Just double check your settings and that should be it.



-Ross


ps, you might want to just go ahead and grab that handle and see if you can feel the knives on the inside of that switch engaging. Also make sure it is not off one way or another and is engaged fully.

On this page enter your serial number and you will be able to download your manual http://www.millerwelds.com/service/ownersmanuals.php In the Dynasty 350 manual I see no "Help 12", there is a 32 and 22. If the Help 12 is only displayed when you push a button, it is saying the combination you have selected is not valid.

Have you turned it off and try blowing compressed air on the cooling fins?