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F-53

TROUBLESHOOTING AND REPAIR

F-53

TACH FEEDBACK TEST

WARNING

Service and repair should only be performed by Lincoln Electric factory trained personnel. Unauthorized repairs performed on this equipment may result in dan- ger to the technician or machine operator and will invalidate your factory warran- ty. 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 per- form the test/repairs safely, contact the Lincoln Electric service department for technical troubleshooting assistance before you proceed. Call 216-383-2531 or 1-800-833-9353(WELD).

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TEST DESCRIPTION

This test will determine if the tach unit is receiving the correct supply voltage from the control board, and also if the tach unit is sending feedback information to the control board.

This procedure takes approximately 7 minutes to perform.

MATERIALS NEEDED

3/8 in. nutdriver Volt-Ohmmeter

POWER WAVE 455/POWER FEED 10

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Lincoln Electric SVM135-B service manual Tach Feedback Test