Lincoln Electric SVM186-A service manual Troubleshooting and Repair

Models: SVM186-A

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F-9

TROUBLESHOOTING AND REPAIR

F-9

 

 

Observe Safety Guidelines detailed in the beginning of this manual.

 

 

 

 

 

 

 

 

 

 

 

PROBLEMS

 

POSSIBLE AREAS OF

 

RECOMMENDED

 

 

(SYMPTOMS)

 

MISADJUSTMENT(S)

 

COURSE OF ACTION

 

 

 

 

 

 

 

 

 

 

 

OUTPUT PROBLEMS

 

 

 

The arc "flutters" when TIG weld-

1.

The tungsten electrode may be

1.

Check the polarity switch for

 

ing.

 

 

too large in diameter for the cur-

 

proper operation and loose or

 

 

 

rent setting.

 

faulty lead connections. See

 

 

 

 

 

 

wiring diagram.

 

 

 

2.

The tungsten tip may not be

 

Perform the SCR Bridge Test.

 

 

 

"sharp" enough.

2.

 

 

 

 

3. Check for loose or faulty con-

 

 

 

3.

The gas shielding may be insuf-

 

nections at the shunt. ( leads

 

 

 

 

ficient. Increase the gas flow

 

#221 and #222 ).

 

 

 

 

and or reduce the tungsten

 

 

 

 

 

 

stickout beyond the gas cup.

4.

Check components R3 and C4

 

 

 

 

 

in the high voltage transformer

 

 

4.

Check for contaminated gas or

 

primary circuit. Replace if nec-

 

 

 

leaks in the gas line, torch, or

 

essary. See wiring diagram.

 

 

 

 

connections.

 

 

 

 

 

 

 

5. The control board may be

 

 

 

5.

If a helium blend is used as a

 

faulty. Replace.

 

 

 

 

shielding gas then reduce the

 

 

 

 

 

 

percentage of helium.

 

 

 

 

 

 

 

 

The arc "pulsates" when AC TIG

1.

Make sure the gas and proce-

1.

Check the micro switch S2A on

welding.

 

 

dure are correct for the process

 

the polarity switch. It may be

 

 

 

 

being used.

 

stuck closed. See wiring dia-

 

 

 

 

 

gram.

 

 

 

 

 

 

 

 

CAUTION

If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact the Lincoln Electric Service Department for technical troubleshooting assistance before you proceed. Call 1-888-935-3877.

PRECISION TIG® 225

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Lincoln Electric SVM186-A service manual Troubleshooting and Repair

SVM186-A specifications

The Lincoln Electric SVM186-A is a versatile and highly efficient welding machine that stands out in the competitive landscape of industrial welding equipment. Designed to meet the needs of both professionals and hobbyists, this machine combines advanced technology with robust construction, delivering outstanding performance in various welding applications.

One of the standout features of the SVM186-A is its multi-process capability. This welding machine can handle MIG, TIG, and Stick welding processes, making it suitable for a diverse range of projects, from light fabrication to heavy-duty work. This flexibility reduces the need for multiple machines, saving time and space for users who require versatility in their welding operations.

The SVM186-A is powered by a reliable and durable inverter technology, which ensures a stable arc and efficient operation across different materials, including stainless steel, aluminum, and mild steel. This inverter technology not only enhances performance but also reduces energy consumption, making it an environmentally friendly choice.

Another notable characteristic of the SVM186-A is its user-friendly interface. The digital display provides real-time information on voltage and wire feed speed, allowing welders to easily adjust settings for optimal results. This intuitive control panel design makes it accessible for both novice welders and seasoned professionals who value precision.

The machine is also built with safety features in mind. It comes equipped with overcurrent protection and thermal overload protection to prevent damage during operation. This ensures that users can work confidently, knowing that the equipment is designed to handle demanding tasks while prioritizing safety.

Portability is another advantage of the SVM186-A. Weighing in at a relatively light weight compared to other industrial welders, this machine is designed for ease of transport. Whether working on-site or in a workshop, welders can easily move the equipment as needed.

In summary, the Lincoln Electric SVM186-A is a sophisticated welding machine that merges technology and practicality. Its multi-process capability, inverter technology, user-friendly interface, safety features, and portability make it a top choice for those seeking dependable and efficient welding solutions. Whether for professional fabrication or personal projects, the SVM186-A is equipped to handle the demands of modern welding tasks with exceptional ease and effectiveness.