Lincoln Electric IM490-C manual Maintenance, Input Filter Capacitor Discharge Procedure

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D-1

 

MAINTENANCE

 

D-1

 

 

 

 

 

WARNING

ELECTRIC SHOCK can kill.

Have an electrician install and service this equipment.

Turn the input power off at the fuse box before working on equipment.

Do not touch electrically hot parts.

Prior to Performing preventative main- tenance, perform the following capaci- tor discharge procedure to avoid elec- tric shock.

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INPUT FILTER CAPACITOR

DISCHARGE PROCEDURE

1.Turn off input power or disconnect input power lines.

2.Remove the 5/16" hex head screws from the side and top of the machine and remove wrap-around machine cover.

3.Be careful not to make contact with the capacitor terminals that are located in the top and bottom of the Power Board.

4.Obtain a high resistance and high wattage resistor (25-1000 ohms and 25 watts minimum). This resis- tor is not supplied with machine. NEVER USE A SHORTING STRAP FOR THIS PROCEDURE.

5.Locate the four capacitor terminals (large hex head cap screws) shown in Figure D.1. One pair at the top and one pair at the bottom of the Power Board.

6.Use electrically insulated gloves and insulated pli- ers. Hold body of the resistor and connect resistor leads across the two capacitor terminals. Hold resistor in place for 10 seconds. DO NOT TOUCH CAPACITOR TERMINALS WITH YOUR BARE HANDS.

7.Repeat discharge procedure for the capacitor on other two terminals.

8.Check voltage across terminals of all capacitors with a DC voltmeter. Polarity of capacitor terminals is marked on PC board above terminals. Voltage should be zero. If any voltage remains, repeat this capacitor discharge procedure.

FIGURE D.1 — LOCATION OF INPUT FILTER CAPACITOR TERMINALS.

POWER

UPPER

BOARD

CAPACITOR TERMINALS

LOWER

CAPACITOR

TERMINALS

POWER

RESISTOR

RIGHT SIDE OF MACHINE

INSULATED

 

PLIERS

INSULATED

GLOVES

INVERTEC V250-S

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Contents INVERTECV250-SFebruary Safety California Proposition 65 WarningsElectric Shock can kill Cylinder may explode if damaged Précautions DE Sûreté Sûreté Pour Soudage a L’ArcThank You Invertec V250-STable of Contents Installation Three Phase Single PhaseThree Phase Technical Specifications Invertec V250-S K1437-2 Safety Precautions Select Suitable LocationInput Connections Input Voltage Reconnect Procedure Input Fuse and Supply WirePower Input Connection for 50/60 HZ Machines Quick Disconnect Plugs Remote Control ReceptacleOutput Connections Output CablesSafety Instructions OperationGeneral Description Controls and Settings Figure B.1 Case Front ControlsAIR Carbon ARC Cutting Constant Current ProcessesManual ARC Welding Stick TIG WeldingParallel Operation Overload ProtectionThermal Protection Remote Controls AccessoriesOptions / Accessories Cable PlugsMaintenance Input Filter Capacitor Discharge ProcedureRoutine Maintenance Filter Capacitor ConditioningFigure D.2 Location of Maintenance Components Troubleshooting & Repair PC Board Troubleshooting ProceduresSymptoms Possible AreasTroubleshooting & Repair Troubleshooting & Repair See Installation Section of this Troubleshooting & Repair Welding Problems Diagrams Wiring DIAGRAM- Codes 10102Wiring Diagram Invertec V250-S Electrical Diagrams Electrical Diagrams Wiring DIAGRAM- CodeDimension Print Invertec V250-S How To Read Shop Drawings Basic CoursePrecaucion Warnung