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F-23

TROUBLESHOOTING AND REPAIR

F-23

TEST PROCEDURES

INPUT FILTER CAPACITOR DISCHARGE PROCEDURE

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 “safety” procedure should be performed before any internal maintenance or repair procedures are attempted on the Power Wave 455. Capacitance normally discharges within 2 minutes of removing input power. This procedure is used to check that the capacitors have properly discharged.

This procedure takes approximately 9 minutes to perform.

MATERIALS NEEDED

3/8 in. nutdriver Volt-Ohmmeter

25-1000 ohms @ 25 watts (minimum) resistor Electrically insulated gloves and pliers

POWER WAVE 455/POWER FEED 10

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Lincoln Electric SVM135-B Test Procedures, Input Filter Capacitor Discharge Procedure, Test Description, Materials Needed