Contactor & Contactor PC Board Test | Lincoln Electric SVM114-C

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F-26

TROUBLESHOOTING AND REPAIR

F-26

CONTACTOR & CONTACTOR PC BOARD TEST (continued)

FIGURE F.13. – CONTACTOR LEAD IN-LINE CONNECTORS.

IN-LINE

CONNECTORS

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CONTACTOR TEST PROCEDURE

1.Open the case door. Remove the wire reel by removing the retaining collar. See Figure F.5.

2.Remove the screws holding the control box cover in place and remove the control box cover. See Figure F.5.

3.Separate the two in-line connectors located behind the reel stand assembly. See Figure F.13. For codes 9812 and below, remove the two contactor coil leads from the contactor PC board. See Figure F.14.

LN-25™

Image 64

Lincoln Electric SVM114-C service manual Contactor & Contactor PC Board Test, Contactor Test Procedure

Contents

Semiautomatic Wire Feeder Safety California Proposition 65 Warnings Fumes and Gases Electric Shock can killCan be dangerous Cylinder may explode if damaged Welding and Cutting Sparks can Cause fire or explosionIii Précautions DE Sûreté Sûreté Pour Soudage a L’Arc Master Table of Contents for ALL Sections Table of Contents Installation Section Installation Technical Specifications LN-25Wire Feed Speed Currentrent Safety Precautions Power Source Connection INVERTEC, CV300 and Other Newer Lincoln Power Sources GUN Cable Connection to FeederWith CV Adapter For GMA GUN and Cables Wire Feed Drive Roll and Guide Tube Kits Weld Cable ConnectionElectrode Cable Connection Work Cable Connection LN-25 Operation Section Welding Capability OperationRead and Understand Entire Section Before Operating Machine Electrode Polarity Switch Wire Feed Mode SwitchWire Speed Dial and Range Switch LN-25 Instruments Controls GAS Post PRE-FLOW Timers Optional Work Clip LeadAWG Remote ARC Voltage Control Optional Sequence of Operation Loading ElectrodeMounting 22 to 30 LB READI-REELCOILS Mounting 10 to 30 LB Spools Loading Wire Drive Idle Roll Pressure SettingGrooves READI-REEL Inside Cage Wires 6OPERATIONB-6 Presetting Wire Feed Speed Setting Constant Wire Feed Speed CV ModeSetting ARC Sensing Wire Feed Speed CC Mode Minimum Arc Volts Figure B.4 VV CC Wire Speed Setting Making a Weld Welding Procedure AT END of CoilCylinder may explode if damaged Overvoltage Shutdown Circuit Protection and Automatic ShutdownMotor Overload Shutdown Accessories Section Accessories Section C Accessories LN-25 Option ChartHow to use Table C.1 Table C.1 K434-1 GAS Flow Timer KIT Optional AccessoriesGAS Solenoid KIT K430-2 for Codes K433 Power Source Remote BOX K432 Remote Control Cable AssemblyRemote Output Control Options and Control Cable Assemblies LN-25 Contactor KIT K443-1 for Codes K439 Remote Extension Cable Assembly K625, K626, K627 Remote Control Cable AssemblyK624-1 42V Remote Output Control Module K444, K444-1 or K444-2 Remote Voltage Control KIT Connector Must be Insulated in this Area To GUN Switch Connect Leads to Pins a and CStyle a DIA. Hole Maintenance Section Routine Maintenance 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 Input Power Circuit Theory of OperationGeneral Description Control Circuit Operation Feedback and Control Circuits Trigger Circuit Optional Circuits ContactorGAS Solenoid 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 GAS Solenoid Valve and Solenoid PC Board Test Test DescriptionMaterials Needed For Codes below 10500 only Test Procedure Screw Wire Reel Retaining CollarCase Door GAS Solenoid Valve Figure F.2 Solenoid Leads Troubleshooting and Repair GAS Solenoid Valve and Solenoid PC Board Test 512624A 621 J11 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 G2196 539 541 500 Hall Effect Module Test539 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 Contactor PC Board Test 28TROUBLESHOOTING and Repair F-28667 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 Present Replacement Purge Switch Leads Solenoid Plug J11GAS Solenoid Valve AND/OR Solenoid PC Board if 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 48TROUBLESHOOTING and Repair F-48 Drive Motor and Gearbox Replacement and Access toHall Effect Module 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 L12253 PC Board Assembly Control Abovr Code 11140 L12253-3L12253-3 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