20 Most Recent RTO Esab Handy Plasma 550 W/25' Pt 31XL Torch 0558002612 Questions & Answers

Hi, when this happens it is usually a problem with the, electronics, often some, one? of the high power semiconductors, often the output ones, and it can often be a thermal cut out problem, however without actually testing and troubleshooting it's pretty hard to tell? These type of issues are among the most difficult to analyse, it's always easier when a device has failed completely, as this make finding the fault more clear cut.
Most often board replacement is the only way to repair, board level, & component replacement unless very skilled, is difficult so board replacement really is the only way to go. This is why one MUST get a service manual, if only for the parts numbers.

If you insist on DIY then you must obtain a service manual, use this and work through the troubleshooting procedures to try your isolate the issue.
Otherwise get a "Quote" from a professional, this way at least you can be appraised of exactly whats wrong, and also prospective costings and go from there?

RTO Esab Handy... | Answered on Sep 06, 2011

inside the unit their is a part witch looks like a spark gap and that is what it is if this part gets dirty of has like a magnetic fuzz in it it will need to be cleaned as well the gap should be reset you will need to contact the manufacture for the specks do to different units have different settings wile you have the side off look for lose connections as well as arking marks for passable shorts their is a variety of things that can go wrong with thease units but what i said is most common do not use high pressure ari to blow clean a metal chip can damage transformer windings and then short out be careful of capacitors they can hold a nasty charge and aslo can be lethal if your not sure i highly suggest you take to a service center for the unit you have hope this helps.

RTO Esab Handy... | Answered on Aug 30, 2010

unlikely, the switch poles are not making contact or a wire has come adrift from one of the swiutch poles.

RTO Esab Handy... | Answered on Jun 23, 2009

Sounds like one or two of the power diodes are defective (open), producing a half wave pulse instead of full wave, giving it a dotting effect.

RTO Esab Handy... | Answered on May 15, 2009

There is a resettable breaker inside the machine that cuts off power to the plasmahead when tripped. Check that and make sure the head is secore to cable and cable is secure to machine.

If it still fails to function check the coil in the contactor to make sure it has not burned out. Also check the pressure switch to make sure it closes contacts to make the circuit when the unit is pressurized If switch is not functional the head will not operate. Also check gas solenoid or solenoids to make sure they do not have burned out coils as well. An Ohmmeter should show about 2000 ohms give or take some. The main contactor winding also. It may be the main contactor needs replacement- a loose power connection can lead to burned contacts. So if you hear the machine click when you press the trigger, but no power to head, and all the other items mentioned still leaves you with no power at the head, that main contactor is the likely culprit.

If IGBT's had failed- they would blow apart part of their plastic case.So a quick visual is usually adequate for those.

RTO Welding... | Answered on Sep 27, 2012

A micro welding torch should be a smaller version of a full size welding torch - identical apart from size. It is most important a user thoroughly familiarises himself or herself with the correct usage and safety precautions because failure to observe the correct procedure can result in extreme danger. A flashback can have potentially serious consequences...

A person who is thoroughly conversant with the procedure and safety will know how to connect the hoses to the welding torch and to the cylinders - if it is a quality unit, it is an intuitive process due to the fuel gas fittings being left hand thread and the oxygen normal or right hand thread and the hoses are or should be different colours with blue being the norm for oxygen and red or orange for the fuel gas.

One final word - never, ever, under any circumstances use a lubricant on the threads of the oxygen bottle or associated fittings...

Welding Tools | Answered on Dec 26, 2020

A great many older home mig welders were produced with a live torch, ie. the manufacturer had saved the cost of the contactor, the high current electromechanical relay that switches the welding current on or off in response to the torch trigger...

It was inevitable some manufacturers would replace the rectifiers and contactor with thyristors (SCRs) and obtain both functions from a single modification.

The trigger switch controls the wire motor and the contactor so if the wire motor is working ok it is unlikely the fault is there and if your welder has a contactor it could be stuck or a wiring fault has caused the coil to be permanently energised or if your welder uses the solid state version, either one or more of the thyristors have failed or a circuit fault has caused the supply to the gate to be permanent causing them to be permanently switched on.

Welding Tools | Answered on Dec 22, 2020

If you need plasma cutters visit this site

Welding Tools | Answered on Dec 02, 2020

This is one is a common issue you have to read the tig welder guide and I am sure you will find something. https://myweldingyard.com/best-tig-welder

Welding Tools | Answered on Nov 11, 2020

Contact Mastercraft directly to inquire.

Welding Tools | Answered on Nov 04, 2020

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