Thermal arc.175 SE master.

[plumbum]

Hi, I have a Thermal arc master 175 SE which when striking an arc goes straight to overheat mode,help please.

 

[Relic]

inverter type?
if so, you could have a number of issues.
a faulty over temp sensor or its connections.
bad power supply rectifier or capacitors.
faulty soft start relay contacts.
failed IGBTS or mosfet.
faulty transformer(s).
faulty oscillator control board.
often overlooked is shunt feed back to control board.
open unit up and look for bulged capacitor or anything black and chard.
post some photos.

 

[Relic]

The fact that oc lights when arc struck points to current feed back.
Photo of your control board would help.
Have half an idea thermal arc is the same as Cigweld.

 

[angellonewolf]

repair of thermal arc stick and tig

tryed googleing Mek Pack resin nothing comes up ?

www.mig-welding.co.uk

if it helps later when hes added pics

ive got the same one in this thread thatr i fixed the board on if you need or cant see blown parts

 

[plumbum]

thank you all, will have another close look at workings.