Input Contactor Test - Lincoln Electric SQUARE WAVE SVM118-A Service Manual

Lincoln electric welder user manual

Table of Contents

F-28

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 or

machine operator and will invalidate your factory warranty. For your safety and to avoid electri-

cal shock, please observe all safety notes and precautions detailed throughout this manual.

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 (WELD).

TEST DESCRIPTION

This test will determine if the input contactor is receiving the correct coil voltage and if the con-

tacts are functioning correctly.

MATERIALS NEEDED

Volt/Ohmmeter (Multimeter)

5/16" Nut driver

External 120 VAC supply

Input Contactor (CR1) Simplified Control Circuit, Figure F.6

Square Wave TIG Wiring Diagram (located in the Electrical Diagrams section of this manual)

TROUBLESHOOTING & REPAIR