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TROUBLESHOOTING AND REPAIR |
OUTPUT CONTROL UNIT (VARIABLE REACTOR)
INSPECTION AND SERVICE PROCEDURE
WARNING
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 electrical 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 trou- bleshooting assistance before you proceed. Call
TEST DESCRIPTION
The output control unit, also known as a variable reactor, functions like a very high cur- rent, highly specialized rheostat. It works together with the series coils in the generator to regulate the weld output and the weld output volt/amp curve. See the theory of operation section of this manual for a more complete description.
This procedure should be performed if a visual inspection of the unit indicates excessive wear, dirt, or damage. It should also be performed if the output control unit fails a ground test, or if called for in the dead short, first step, or open reactor tests. It should also be done if the weld output is low or erratic, and the auxiliary output is normal.
MATERIALS NEEDED
Miscellaneous Hand Tools 400 to 600 Grit sand paper Ohm meter
