Test Procedures; Input Filter Capacitor Discharge Procedure - Lincoln Electric POWER WAVE SVM135-B Service Manual

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