Kempotig 250 AC/DC wont start

[d.geertsma]

Hi everyone,

Iam new to this forum but already have a question

I have a kempotig 250 ac/dc tig welder that always worked fine. Now i have not used it for a while it wont start anymore. When i press the start button gas flows (i also hear the relay of gas clicking) but it wont start (high frequent start as well as strike start).

Also there is a light burning of H7 it says in the manual, "pressure guard", so i thought my water pressure measure gauge was broken, but it was already connected true (see picture).

I already checked the 3 circuits in the picture, but i cannot find a visual defect on any of the capacitors. (https://www.mig-welding.co.uk/forum/threads/my-own-kempotig-250-ac-dc-problems.33500/)



Can anyone help me with a wire schematic or a tip what i can check and why this light is burning?

Thanks ahead!

 

[Screwdriver]

I have the same unit and have posted all the information I have on it in this forum. If you do a search you will know everything I know.

<edit> I had a similar fault which turned out to be a blown internal electrode in the torch connection hose. There's a fuse in there as well which can become corroded.

 

[d.geertsma]

I have the same unit and have posted all the information I have on it in this forum. If you do a search you will know everything I know.

<edit> I had a similar fault which turned out to be a blown internal electrode in the torch connection hose. There's a fuse in there as well which can become corroded.

Thanks, didnt now that. Will try it tomorrow and let you know.

 

[d.geertsma]

Unfortunately there is no fuse in my torch. But thanks anyway.

 

[Screwdriver]

On mine there is an electrode (wire) which runs inside the watercooled hose which needed repair. In the hose connection I found a component which I assume is a fusible link (on the grounds that it had blown).

 

[Bernhard]

.

 

[eddie49]

Translation of Post #6:

"Hello d.geertsma,
Sorry to hear that your Kempotig is not working properly.

I also have a Kempotig AC/DC250 myself and want to try it. Now I'm not a welder, but I want to learn. Can you help me with a Dutch or English manual? I've searched the entire internet and found an explanation of the buttons and a user manual in Swedish (see attachment) I hope you can help me.
Thanks in advance for your response. Regards, Ben Thiemann"

Ben, the Forum member d.geertsma has not been online here for 3 years, so I don't think you will get a reply from him.
I have added an update to your other thread about the Kempotig:

Manual Kempotig AC/DC 250

Hello everybody, Is there anybody who can help me with an English manual for my Kempotig AC/DC 250? Thanks in advance. Kindest regards, Ben

www.mig-welding.co.uk

 

[Bernhard]

Hi eddy49,

Thanks for your answer.

 

[Screwdriver]

Hi eddy49,

Thanks for your answer.

You're welcome.

 

[Dutch Welder]

Hi Bernhard, what do you need to know.
Do you think something is wrong with the machine, or are you unsure how to set it up/
What do you want to weld??

 

[Dutch Welder]

Why remove my dutch translation of the above comments, but don't remove them earlier??