Lincoln Electric SVM157-A service manual Operation, Wear eye, ear and body protec- tion

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B-2

OPERATION

B-2

Read entire Operation section before operating the POWER MIG 200.

WARNING

ELECTRIC SHOCK can kill.

•Do not touch electrically live parts or electrode with skin or wet clothing. Insulate yourself from work and ground.

•Always wear dry insulating gloves.

FUMES AND GASES can be dangerous.

• Keep your head out of fumes.

•Use ventilation or exhaust to remove fumes from breathing zone.

WELDING SPARKS can cause fire or explosion.

•Keep flammable material away.

•Do not weld on closed containers.

ARC RAYS can burn eyes and skin.

• Wear eye, ear and body protec- tion.

Observe all safety information throughout this manual.

POWER MIG 200

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Contents Power MIG Safety Depends on YouSafety California Proposition 65 WarningsElectric Shock can kill ARC Rays can burnCylinder may explode if damaged IiiPrécautions DE Sûreté Sûreté Pour Soudage a L’ArcMaster Table of Contents for ALL Sections Table of Contents Installation SectionInstallation Technical Specifications Power MIG3INSTALLATIONA-3 Figure A.1 Dual Voltage Machine Input Connections Output Polarity Connections Figure A.2 Triple Voltage Machine Input ConnectionsCylinder may explode if damaged GUN and Cable InstallationShielding GAS Operation Section Operation Section BOperation Wear eye, ear and body protec- tionProduct Description Wire Drive RollWire Size Conversion Parts Recommended Processes and EquipmentTo Start the Welder Procedure for Changing Drive and Idle Roll SetsWire Reel Loading READI-REELS, Spools or Coils Feeding Wire Electrode Making a Weld Idle Roll Pressure SettingFAN Control Avoiding Wire Feeding ProblemsWire Feed Overload Protection Input Line Voltage VariationsAccessories Section K363P READI-REEL Adapter AccessoriesDrive Roll Kits Dual Cylinder Mounting KIT K1702-1Installed Adapter KIT and Spool GUNPower MIG Maintenance Section Maintenance This screw should only be gently tightened Cause poor wire feedingLiner Removal and REPLACE- Ment Overtightening will split or collapse the linerGUN Handle Disassembly English Metric Description SizeMaintenance Power MIG Line Switch Theory of Operation SectionTheory of Operation Output Rectification Contactor and Control Board Motor Control BoardControl BOARD, GUN Trigger and Wire Drive Motor Figure E.4 Optional CircuitsWirefeed Overload Protection Thermal and Overload ProtectionPower MIG Troubleshooting and Repair Section Troubleshooting and Repair Section FTroubleshooting and Repair How To Use Troubleshooting GuidePC Board Troubleshooting Procedures Perform the Main Transformer Perform the Output Contactor Your body These capacitors is toxicAvoid contact with any portion Function Problems Tachometer Feedback Test Welding Problems Weld bead is narrow or ropy Make sure the welding proce Materials Needed Main Transformer TestTest Description ON/OFF Power Switch will be hot during these tests Main Transformer TestX10 Table F.1. Test Points Input Voltage Test PointsWire Drive Motor and Tachometer Feedback Test Test Procedure Figure F.4. Plug J4Disconnect the main AC input power to the machine Test for Supply Voltage to TachometerTest for Feedback Voltage to Control Board VDCOutput Bridge Rectifier Test Test Procedure Output Bridge Rectifier TestContactor Test Contactor Test Figure F.7. Contactor Terminals and LeadsVolts 10.0 Typical Output Voltage Waveform Machine Loaded MAX TAP GVolts 20.0 Normal Open Circuit Voltage Waveform MAX TAP GMachine Loaded to 180 Amps AT 16 VDC Scope Settings Volts 20.0 Control Board Replacement DescriptionControl Board Replacement ProcedureWire Drive Motor Assembly Replacement Wire Drive Motor Assembly Replacement Wire DriveBolt Gas Hose TOC Output Diode Bridge Rectifier Replacement Output Diode Bridge Rectifier Mounting Bracket Mounting Bolts Rectifier Power MIG Output Capacitors Replacement Output Capacitors Replacement Figure F.14. Capacitor Bank LocationLead Mounting Bolts Nuts & Lock washers Places Power MIG 41TROUBLESHOOTING and REPAIRF-41 Main Transformer ReplacementMain Transformer Replacement See Figure F.17Replacement Figure F.17. Leads X9, X10, 104B,104C, & H1BX2 X3 X4 X5 X6 X7 Lead Power MIG FAN BLADE/MOTOR Replacement FAN BLADE/MOTOR Replacement Perform the Output Capacitor Bank Removal ProcedureOutput Contactor Replacement Output Contactor Replacement Figure F.24Mounting Bolts Retest After Repair Electrical Diagrams Table of Contents Electrical Diagrams SectionPower MIG 200 208/230V Wiring DiagramSchematic Control PC Board PC Board ASSEMBLY-CONTROL G3851-1SVM Error Reporting Form