External Resistance Test (Leads #21 And #67 - Lincoln Electric NA-5N Service Manual

F-50 F-50
TROUBLESHOOTING & REPAIR

EXTERNAL RESISTANCE TEST (LEADS #21 AND #67)

WARNING
Service and repair should be performed only by Lincoln Electric factory trained per-
sonnel. Unauthorized repairs performed on this equipment could result in danger to
the technician or the machine operator and will invalidate your factory warranty. For
your safety and to avoid electrical shock, please observe all safety notes and precau-
tions detailed throughout this manual.
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 assistance before you proceed.
Call (216) 383-2531 or (800) 833-9353 (WELD).
_____________________________________________________________
TEST DESCRIPTION
This test will help the technician to determine if the external voltage sensing leads are con-
nected properly and intact.
This procedure takes approximately 8 minutes to perform.
MATERIALS NEEDED
Volt-Ohmmeter (Multimeter)
5/16" Nutdriver
3/4" wrench
Wiring diagram
NA-5