How To Use Troubleshooting Guide - Lincoln Electric 11937 Service Manual

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HOW TO USE TROUBLESHOOTING GUIDE

Service and Repair should only be performed by 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.
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This Troubleshooting Guide is provided to
help you locate and repair possible machine
malfunctions. Simply follow the three-step
procedure 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 the follow-
ing categories: output problems, function
problems, wire feeding problems, welding
problems, gas flow problems and spool gun
problems.
Step 2. PERFORM EXTERNAL TESTS.
The second column labeled "POSSIBLE
AREAS OF MISADJUSTMENT(S)" lists the
obvious external possibilities that may con-
tribute to the machine symptom. Perform
these tests/checks in the order listed. In
general, these tests can be conducted with-
out removing the case wrap-around cover.
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 assis-
tance before you proceed. Call 1-888-935-3877.
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TROUBLESHOOTING AND REPAIR
WIRE FEEDER WELDER (180 MODEL)
WARNING
Step 3. RECOMMENDED
COURSE OF ACTION
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 specified
test points, components, terminal strips,
etc. can be found on the referenced electri-
cal wiring diagrams and schematics. Refer
to the Electrical Diagrams Section Table of
Contents to locate the appropriate diagram.
CAUTION
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