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F-4

TROUBLESHOOTING AND REPAIR

F-4

Observe Safety Guidelines detailed in the beginning of this manual.

 

 

 

 

 

 

PROBLEMS

POSSIBLE AREAS OF

RECOMMENDED

 

(SYMPTOMS)

MISADJUSTMENT(S)

COURSE OF ACTION

 

 

 

 

 

 

 

 

OUTPUT PROBLEMS

 

 

Both the weld and auxiliary

Make sure the engine is

Perform the Engine RPM

 

output voltages are low

operating at the correct high idle

Adjustment Test.

 

 

 

speed.

Perform the Brush and Slip

 

 

 

Make sure that no load is

 

 

 

Ring Service Procedure.

 

 

 

connected to either the weld or

Perform the Exciter Rotor

 

 

 

auxiliary outputs.

 

 

 

 

Voltage Test.

 

 

 

 

Perform Exciter Rotor

 

 

 

 

Resistance and Ground Test.

 

 

 

 

 

There is no, or very low weld

Check that the electrode polarity

Perform the Brush and Slip

 

output, and no auxiliary output.

switch is not in the off position,

Ring Service Procedure.

 

 

 

and that the remote/local switch

Perform the Exciter Rotor

 

 

 

is in the local control position.

 

 

 

Check that the auxiliary power

Voltage Test.

 

 

 

circuit breakers and GFCIs (if so

Perform the Exciter Rotor

 

 

 

equipped) are not tripped.

 

 

 

Resistance and Ground Test.

 

 

 

 

 

 

 

NOTE: GFCIs will not reliably

 

 

 

 

reset, unless engine is operating

 

 

 

 

at high idle RPM.

 

 

 

 

Check all leads and cables for

 

 

 

 

damaged or poor connections.

 

 

 

 

 

 

There is no, or very low weld

Check the polarity switch; make

Perform the Shunt Field Coil

 

output voltage.

The auxiliary

sure it is not in the off position.

Resistance and Ground Test.

 

output is normal.

Check that the remote/local

Perform the Shunt Field Circuit

 

 

 

 

switch is positioned correctly.

Voltage Test.

 

 

 

If a remote current control is

Perform the Welding Generator

 

 

being used, try switching to

Brush and Commutator

 

 

 

local control. The remote

Inspection and Service

 

 

 

current control may be faulty.

Procedure.

 

 

 

Check all leads and cables for

Check for damaged or poor

 

 

 

damaged or poor connections.

connections at the brush

 

 

 

 

holders, series and interpole

 

 

 

 

coils, weld output control unit,

 

 

 

 

weld output terminals, and all

 

 

 

 

the conductors connecting these

 

 

 

components.

 

 

 

 

The Armature may be faulty.

 

 

 

 

 

 

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.

SAE-400 SEVERE DUTY

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Lincoln Electric SVM187-A service manual Adjustment Test

SVM187-A specifications

The Lincoln Electric SVM187-A is a cutting-edge welding machine designed for professional welders and industrial applications. Known for its reliability and performance, it stands out in the competitive welding equipment market. This versatile machine is structured to handle various welding processes, making it a popular choice among users.

One of the primary features of the SVM187-A is its multifunctional capabilities. It supports MIG, TIG, and Stick welding, allowing users to switch between different welding techniques seamlessly. This flexibility makes it suitable for diverse applications, whether working on automotive repairs, metal fabrication, or construction projects. Additionally, the machine is equipped with a robust power output, ranging from low to high amperage settings, enabling users to tackle a wide array of materials, including mild steel, stainless steel, and aluminum.

The SVM187-A incorporates advanced inverter technology, which ensures increased efficiency and reduced energy consumption. This technology leads to a more compact design, making the unit portable and easy to transport. The lightweight construction of the machine does not compromise its durability; it is built with high-quality materials to withstand the rigors of a professional workshop.

Another notable characteristic of the SVM187-A is its user-friendly interface. The intuitive control panel includes digital displays for precise settings adjustments, ensuring accuracy during operation. Beginners and seasoned welders alike can benefit from the clear and straightforward design, reducing training time and enhancing productivity.

Safety features are paramount in the SVM187-A's design. The machine is equipped with thermal overload protection, ensuring that it operates within a safe temperature range to prevent damage and promote longevity. Additionally, it features automatic voltage regulation, which maintains a stable arc even under varying input voltage conditions.

In summary, the Lincoln Electric SVM187-A is a versatile, efficient, and user-friendly welding machine suited for both professional and industrial applications. Its multifunctionality, inverter technology, and robust safety features set it apart from competitors, making it a reliable choice for welders seeking to elevate their craftsmanship while ensuring safety and efficiency. This machine represents the innovation and quality that Lincoln Electric is renowned for in the welding industry.