Input Filter Capacitor Discharge Procedure - Lincoln Electric PRO-CUT 25 Service Manual

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INPUT FILTER CAPACITOR DISCHARGE PROCEDURE

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
troubleshooting assistance before you proceed. Call 1-800-833-9353 (WELD).
DESCRIPTION
This procedure will drain off any charge stored in the four capacitors that are part of the
Inverter Board assembly. This procedure MUST be performed, as a safety precaution,
before conducting any test or repair procedure that requires you to touch internal
components of the machine.
MATERIALS NEEDED
4mm Allen Wrench
Volt/Ohmmeter
7mm Nut Driver
Crescent Wrench
Insulated Gloves
Insulated Pliers
High Wattage Resistor - 25 to 1000 ohms, 25 watts minimum
This procedure takes approximately 15 minutes to perform.
TROUBLESHOOTING & REPAIR
WARNING
PRO-CUT 25
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