LN-25 | Lincoln Electric SVM114-C manual

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			F-52

LN-25™

NOTES

F-52

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Lincoln Electric SVM114-C service manual LN-25

Contents

Semiautomatic Wire Feeder Safety California Proposition 65 Warnings Electric Shock can kill Fumes and GasesCan be dangerous Welding and Cutting Sparks can Cause fire or explosion Cylinder may explode if damagedIii Précautions DE Sûreté Sûreté Pour Soudage a L’Arc Master Table of Contents for ALL Sections Table of Contents Installation Section Wire Feed Speed InstallationTechnical Specifications LN-25 Currentrent Safety Precautions Power Source Connection With CV Adapter INVERTEC, CV300 and Other Newer Lincoln Power SourcesGUN Cable Connection to Feeder For GMA GUN and Cables Electrode Cable Connection Wire Feed Drive Roll and Guide Tube KitsWeld Cable Connection Work Cable Connection LN-25 Operation Section Operation Welding CapabilityRead and Understand Entire Section Before Operating Machine Wire Speed Dial and Range Switch Electrode Polarity SwitchWire Feed Mode Switch LN-25 Instruments Controls AWG GAS Post PRE-FLOW Timers OptionalWork Clip Lead Remote ARC Voltage Control Optional Mounting 22 to 30 LB READI-REELCOILS Sequence of OperationLoading Electrode Mounting 10 to 30 LB Spools Grooves READI-REEL Inside Cage Wires Loading Wire DriveIdle Roll Pressure Setting 6OPERATIONB-6 Setting ARC Sensing Wire Feed Speed CC Mode Presetting Wire Feed SpeedSetting Constant Wire Feed Speed CV Mode Minimum Arc Volts Figure B.4 VV CC Wire Speed Setting Making a Weld Procedure AT END of Coil WeldingCylinder may explode if damaged Circuit Protection and Automatic Shutdown Overvoltage ShutdownMotor Overload Shutdown Accessories Section Accessories Section C How to use Table C.1 AccessoriesLN-25 Option Chart Table C.1 Optional Accessories K434-1 GAS Flow Timer KITGAS Solenoid KIT K430-2 for Codes Remote Output Control Options and Control Cable Assemblies K433 Power Source Remote BOXK432 Remote Control Cable Assembly LN-25 Contactor KIT K443-1 for Codes K624-1 42V Remote Output Control Module K439 Remote Extension Cable AssemblyK625, K626, K627 Remote Control Cable Assembly K444, K444-1 or K444-2 Remote Voltage Control KIT Style a Connector Must be Insulated in this AreaTo GUN Switch Connect Leads to Pins a and C DIA. Hole Maintenance Section Maintenance Routine MaintenanceAdjusting Speed Sensor Module Calibration of LN-25 Wire Speed Dial LN-25 Figure E.1 Theory of Operation Block Diagram Theory of Operation Section General Description Input Power CircuitTheory of Operation Control Circuit Operation Feedback and Control Circuits Trigger Circuit GAS Solenoid Optional CircuitsContactor Later Models Protective Devices Circuits Control PC Board Fuses LN-25 Troubleshooting and Repair Section 2TROUBLESHOOTING and REPAIRF-2 HOW to USE Troubleshooting Guide Troubleshooting and Repair PC Board Troubleshooting Procedures Feeding Problems Feeding Problems Hall Effect Materials Needed GAS Solenoid Valve and Solenoid PC Board TestTest Description For Codes below 10500 only Case Door Test ProcedureScrew Wire Reel Retaining Collar GAS Solenoid Valve Figure F.2 Solenoid Leads Troubleshooting and Repair 624A 621 J11 GAS Solenoid Valve and Solenoid PC Board Test512 PC Board for K430 GAS Solenoid KIT LN-25 GAS Solenoid Valve and Control PC Board Test For Codes Above 10500 only For Codes Above 10500 only Figure F.5 Control BOX Cover Removal Solenoid Leads Figure F.6. Solenoid Leads Figure F.7. Applied Voltage Polarity Control PC Board Solenoid Circuitry Test G3425 667 555 691 621 500 512 690 LN-25 Hall Effect Module Test Hall Effect Module Test G2196 539 541 500539 G1757 Figure F.11 Control PC Board Codes Above LN-25 Wire Drive Motor Test Drive Motor Lead IN-LINE Connector Hall Effect Module Contactor & Contactor PC Board Test Contactor Test Procedure Contactor & Contactor PC Board Test S20963 Contactor Coil Leads 28TROUBLESHOOTING and Repair F-28 Contactor PC Board Test667 J14 LN-25 Contactor PC Board Replacement Tools Required Contactor PC Board Replacement Repair Procedure 33TROUBLESHOOTING and Repair F-33 Figure F.17 Control PC Board Replacement Control PC Board Replacement Figure F.21. Control PC Board Codes 9812 and below Figure F.22. Plug Locations for L12253- Control Board J14 Figure F.24. Control Board Replacement PC Board Screw Contactor Replacement For Codes below 40TROUBLESHOOTING and Repair F-40 Contactor Replacement For Codes Above Figure F.26 Phillips Head Screwdriver Wrench Pliers GAS Solenoid Valve AND/OR Solenoid PC Board if Present ReplacementPurge Switch Leads Solenoid Plug J11 GAS Solenoid Figure F.29. Solenoid Assembly Wiring Codes 9812 and below Figure F.31. GAS Solenoid Assembly for Earlier Codes Phillips Head Screwdriver Wrench Slot Head Screwdriver Hall Effect Module 48TROUBLESHOOTING and Repair F-48Drive Motor and Gearbox Replacement and Access to Mylar Insulation Electrode Cable G1757 Figure F.34. Drive Motor Replacement Retest After Repair LN-25 Electrical Diagrams Table of Contents Electrical Diagrams Section Wiring Diagram Above Code 11140 G4679 Optional 42 Volt Remote Output Control Wiring Diagram Code 10556 Thru 10500 L10925 Wiring Diagram Code 10100 Thru 10500 L9644 Wiring Diagram below Code 9900 L7545 Schematic Complete Machine Codes Above 11140 G5366 LN-25 Across the ARC Model Schematic Complete Machine below Code 9900 only G1833 Schematic Control PC BD Above Code 11140 G4616-5 Schematic Control PC BD Code 10556 Thru 10558 G3424-3 Schematic Control PC BD Code 10100 Thru 10500 G2194 PC Board Assembly Control Abovr Code 11140 L12253-3 L12253L12253-3 PC Board Assembly Control Code 10556 Thru 10558 G3425-3 G3425 PC Board Assembly Control Code 10100 Thru 10500 G2196-1 PC Board Assembly Control below Code 9900 G1757-6 LN-25 Control Schematic Contactor PC BD Above Code 10500 M10965 Contactor Schematic Contactor PC BD Code 10100 Thru 10500 M17621 Electrical Diagrams Electrical Diagrams PC Board Assembly Contactor Above Code 10500 L10863-1 L10863 PC Board Assembly Contactor Code 10100 Thru 10500 L9670-1 PC Board Assembly Contactor below Code 9900 L9185-2