Lincoln Electric SVM194-A service manual 49TROUBLESHOOTING and REPAIRF-49

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F-49TROUBLESHOOTING AND REPAIRF-49

EXCITER STATOR SHORT CIRCUIT & GROUND TEST PROCEDURE

WARNING

Service and repair should be performed only by 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 1-888-935-3877.

TEST DESCRIPTION

This test will determine if there are undesirable electrical connections between the exciter stator windings and chassis ground, or between individual windings within the exciter sta- tor.

This test should be performed if flashing voltage is present at the rotor slip rings, rotor resistance, the D1 field bridge rectifier, and all associated wiring are proven to be good, but the exciter stator output voltage fails to build-up to normal levels, or is too high in one or more of the windings.

MATERIALS NEEDED

Miscellaneous hand tools

Multimeter

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CLASSIC® 300D & 300G