Troubleshooting And Repair; How To Use Troubleshooting Guide - Lincoln Electric POWER-ARC 4000 SVM103-A Service Manual

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HOW TO USE TROUBLESHOOTING GUIDE

Service and repair should be performed by only Lincoln Electric Factory Trained Personnel.
Unauthorized repairs performed on this equipment may result in danger to the technician and machine
operator and will invalidate your factory warranty. For your safety and to avoid Electrical Shock, please
observe all safety notes and precautions detailed throughout this manual.
This Troubleshooting Guide is provided to help
you locate and repair possible machine mal-
functions. Simply follow the three-step proce-
dure listed below.
Step 1. LOCATE PROBLEM (SYMPTOM).
Look under the column labeled " PROBLEM
(SYMPTOMS). This column describes possible
symptoms that the machine may exhibit. Find
the listing that best describes the symptom that
the machine is exhibiting.
grouped into three main categories: Welding
Problems, Engine Problems, and Output
Problems.
Step 2. PERFORM EXTERNAL TESTS. The
second column, labeled "POSSIBLE AREAS OF
MISADJUSTMENT(S)", lists the obvious external
possibilities that may contribute to the machine
symptom. Perform these tests/checks in the
order listed. In general, these tests can be con-
ducted without removing the case wrap-around
cover.
If for any reason you do not understand the test procedures or are unable to perform the test/repairs
safely, contact the Lincoln Electric Service Department for electrical troubleshooting assistance before
you proceed. Call 216-383-2531 or 1-800—833-9353.
POWER-ARC 4000
TROUBLESHOOTING & REPAIR
WARNING
Symptoms are
CAUTION
Step 3. PERFORM COMPONENT TESTS. The
last column, labeled "Recommended Course of
Action lists the most likely components that may
have failed in your machine. It also specifies the
appropriate test procedure to verify that the
subject component is either good or bad. If
there are a number of possible components,
check the components in the order listed to
eliminate one possibility at a time until you
locate the cause of your problem.
All of the referenced test procedures referred to
in the Troubleshooting Guide are described in
detail at the end of this chapter. Refer to the
Troubleshooting and Repair Table of Contents
to locate each specific Test Procedure. All of
the referred to test points. components, terminal
strips, etc., can be found on the referenced
electrical wiring diagrams and schematics.
Refer to the Electrical Diagrams Section Table of
Contents to locate the appropriate diagram.