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TROUBLESHOOTING & REPAIR
F-9 F-9
POWER WAVE 455/R
INPUT FILTER CAPACITOR DISCHARGE 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 1-800-833-9353 (WELD).
DESCRIPTION
This “safety” procedure should be performed before any internal maintenance or repair
procedures are attempted on the Power Wave 455/R. Capacitance normally discharges
within 2 minutes of removing input power. This procedure is used to check that the capac-
itors have properly discharged.
MATERIALS NEEDED
3/8” Nut driver
Volt-ohmmeter
25-1000 ohms @ 25 watts (minimum) resistor
Electrically insulated gloves and pliers
This procedure should take approximately 15 minutes to perform.
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