Troubleshooting Section - Lincoln Electric SQUARE WAVE TIG 175 PRO Operator's Manual

12
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.
__________________________________________________________________________
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 pos-
sible symptoms that the machine may exhib-
it. Find the listing that best describes the
symptom that the machine is exhibiting.
Symptoms are grouped into the following
categories: output problems, function prob-
lems, TIG mode problems, TIG welding prob-
lems and Stick welding 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.
DO NOT use a volt-ohm meter to measure output voltages in TIG mode. The High
Frequency Arc Starter voltage can damage the meter.
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your Local
Lincoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed.
TROUBLESHOOTING
WARNING
CAUTION
CAUTION
SQUARE WAVE TIG 175 PRO
Step 3. RECOMMENDED COURSE OF
ACTION
If you have exhausted all of the items in step
2. Contact your Local Lincoln Authorized
Field Service Facility.
12