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F-12

 

 

 

 

 

 

 

 

 

 

 

F-12

TROUBLESHOOTING & REPAIR

 

 

 

 

 

TROUBLESHOOTING GUIDE

 

 

 

 

 

 

Observe Safety Guidelines

 

 

 

 

 

detailed in the beginning of this manual.

 

 

 

 

 

PROBLEMS

POSSIBLE AREAS OF

 

RECOMMENDED

 

(SYMPTOMS)

MISADJUSTMENT(S)

 

COURSE OF ACTION

 

 

 

 

 

 

 

 

 

 

 

 

FUNCTION PROBLEMS

 

 

 

 

 

 

 

The welding arc is “cold.” The

1.

Check for loose or faulty con-

1.

Using a voltmeter, check for the

engine runs normally. The auxiliary

 

nections at the weld output ter-

 

correct OCV at the weld termi-

power is normal.

 

minals and welding cable con-

 

nals.

If

the

correct

voltage is

 

 

nections.

 

 

 

 

present, then check for loose

 

2. The welding cables may be too

 

connections on the heavy cur-

 

 

rent

carrying

leads

inside the

 

 

long or

coiled, causing

an

 

 

 

 

machine.

See the Wiring

 

 

excessive voltage drop.

 

 

 

 

 

 

Diagram.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3.

Check to

make sure that

the

2.

If the OCV is low, perform the

 

 

machine

settings

match

the

 

 

 

Engine

Throttle Adjustment

 

 

weld application.

 

 

 

 

 

 

 

 

Test.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4.

If a remote control

unit is

not

3. Perform the SCR/Diode Bridge

 

 

connected to the machine, make

 

 

 

Test.

 

 

 

 

 

 

 

sure the

Local/Remote switch

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(S1) is in the “LOCAL” position.

4. Perform the Stator Voltage Test.

 

5.

If the remote control unit is con-

5.

Perform the Range Switch Test.

 

 

nected, and the machine oper-

6.

Perform

the

Fine

Control

 

 

ates normally when the switch is

 

 

 

Potentiometer Test.

 

 

 

in the “LOCAL” position, the

 

 

 

 

7. Check fro poor connections at

 

 

remote control cable or unit may

 

 

be faulty. Check or replace.

 

the J1 molex plug at the control

 

 

 

 

 

 

 

board and at the shunt. Also,

 

 

 

 

 

 

 

perform the Shunt Calibration

 

 

 

 

 

 

 

Test.

 

 

 

 

 

 

 

 

 

 

 

8. Check

for

poor connections

 

 

 

 

 

 

 

along lead #204A at the diode

 

 

 

 

 

 

 

bridge and at J6 pin 4 molex at

 

 

 

 

 

 

 

the control pc board. This is

 

 

 

 

 

 

 

control board common.

 

 

 

 

 

 

9. Check for poor connections at

 

 

 

 

 

 

 

J6 pins 1, 2 & 3 molex plug at

 

 

 

 

 

 

 

the control board. Also check

 

 

 

 

 

 

 

leads G1, G2 & G3 to each

 

 

 

 

 

 

 

SCR. These are SCR gate drive

 

 

 

 

 

 

 

outputs.

 

 

 

 

 

 

 

 

 

 

10. Check

for

poor connections

 

 

 

 

 

 

 

along lead #207 at the negative

 

 

 

 

 

 

 

CC output stud, and at the J6

 

 

 

 

 

 

 

pin 10 molex plug at the control

 

 

 

 

 

 

 

board. This is CC arc voltage

 

 

 

 

 

 

 

feedback input. Will not affect

 

 

 

 

 

 

 

welding in the CV tap.

 

 

 

 

 

 

 

 

 

 

 

 

 

CAUTION

If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, con- tact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call 1- 800-833-9353 (WELD).

COMMANDER 400

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Lincoln Electric SVM133-B service manual Local/Remote switch

SVM133-B specifications

The Lincoln Electric SVM133-B is an innovative welding machine designed to meet the diverse needs of welders and fabrication shops. This versatile equipment combines state-of-the-art technology with user-friendly features, making it ideal for both novice and professional welders.

One of the main features of the SVM133-B is its advanced inverter technology. This allows for a more efficient power delivery, which translates into reduced energy consumption and lower operational costs. The machine is capable of delivering optimal welding performance across a range of materials, from thin sheets to heavier sections, making it suitable for various applications in industries such as automotive, construction, and repair.

The SVM133-B supports multiple welding processes, including MIG, stick, and TIG welding. This flexibility ensures that users can adapt to various job requirements without needing multiple machines. The intuitive control panel allows users to switch between modes effortlessly, providing a seamless welding experience.

Another notable characteristic of the SVM133-B is its compact and lightweight design. Weighing significantly less than traditional welding machines, it is highly portable, making it easy to transport to different job sites. Additionally, its rugged construction ensures durability, allowing it to withstand tough working conditions.

The SVM133-B is equipped with advanced safety features, such as overheat and overload protection, which safeguard both the machine and the user during operation. It also includes a digital display that provides real-time feedback on settings, voltage, and amperage, which enhances precision and control during welding tasks.

Lincoln Electric has prioritized ease of use in the SVM133-B, with quick setup guides and clear instructions. This user-centric approach not only facilitates a smoother learning curve for beginners but also optimizes the workflow for experienced welders, enabling them to maximize productivity.

One of the standout features is the capability to weld aluminum with ease, thanks to its spool gun compatibility. This feature sets the SVM133-B apart from many competitors, providing added value for users who require flexibility in their welding projects.

In summary, the Lincoln Electric SVM133-B stands out in the welding machine market due to its inverter technology, multi-process capabilities, portability, and robust safety measures. It embodies the perfect blend of innovation and practicality, making it a top choice for welders looking to enhance their skills and productivity across a wide array of applications. Whether for professional use or hobbyist projects, the SVM133-B offers a reliable solution for high-quality welding tasks.