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F-2
TROUBLESHOOTING & REPAIR
F-2
POWER-ARC 4000
CAUTION
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. Symptoms are
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 exter-
nal possibilities that may contribute to the
machine symptom. Perform these tests/checks
in the order listed. In general, these tests can
be conducted without removing the case wrap-
around cover.
Step 3. PERFORM COMPONENT TESTS.
The last column, labeled “Recommended
Course of Action lists the most likely compo-
nents 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 com-
ponents, 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, termi-
nal 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.
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 1-800-833-9353.
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.
WARNING