Lincoln Electric SVM179-B service manual Removal Procedure, Figure F.6 Control BOX

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F-20	TROUBLESHOOTING & REPAIR	F-20

CONTACTOR REMOVAL AND REPLACEMENT PROCEDURE (CONTINUED)

FIGURE F.6 – CONTROL BOX

CONTROL BOX

REMOVAL PROCEDURE

1.Perform the Case Removal Procedure.

2.Remove the 5 #10-24 x .50 screws holding the control box cover to access the contactor leads. See Figure F.2.

3.Disconnect both of the buss bar connectors. DO NOT loosen the mounting block before loosening the buss bar. See Figure F.6.

4.Remove the five #10-24 x .50 screws from the wire drive panel, and separate the panel from the control box.

5.Remove the two #10-24 x .50 screws at the base of the control box that holds the contac- tor and remove the contactor.

6.Disconnect the coil leads, and the buss bars from the contactor.

LN-25™ PRO

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Contents LN-25PRO Wire Feeder Safety LN-25 PROElectric Shock can kill ARC Rays can burn For Electrically Welding CuttingIii Précautions DE Sûreté Sûreté Pour Soudage a L’ArcMaster Table of Contents for ALL Sections Table of Contents Installation Section Installation Safety Precautions High Frequency ProtectionLocation ELECTRIC SHOCK can KillWire Drive Configuration Cable ConnectionsShielding GAS Connection Changing the GUN Receiver BushingProcedure to Install Drive Rolls Wire GuidesLoading Spools of Wire Pressure ARM AdjustmentGUN Connection Across the ARC SET-UPS Power Source to LN-25 PRO Cable Connection DiagramsDescription Figure A.7 Table of Contents Operation Section Safety Precautions OperationGeneral Description Description Wire Feed Speed KnobAnalog Voltmeter Wire Feed Speed, CC Operation See Figure B.2 or Figure B.2Table B.2 VV CC Wire Speed Setting Constant Current VS Constant Voltage Wire Welding Figure B-3PIN GUN Trigger Connector See Figure B.1 Wire Feed Speed Range Switch K2613-5 and K2613-7 onlyWork Sense Lead Thermal LED, Motor Overload See Figure B.1Internal Controls Figure B.4Step Trigger Interlock Switch CV/CC SwitchInternal Controls Description Cold Feed PushbuttonOptional PREFLOW, Burnback Postflow Timer KIT K2330-2 Preflow TimerRear Controls Figure B.5POWER-UP Sequence GAS Purge PushbuttonFlow Meter ScfhLN-25 PRO Table of Contents Accessories Section Accessories Factory Installed EquipmentWire Type Drive Roll KitsAccessories Accessories K435 Spindle Adapter, for mounting Installation of the K590-6 Water Cooling KIT Table of Contents Maintenance Section Maintenance Routine MaintenancePeriodic Maintenance Calibration SpecificationCover Wire Feed SpeedBoard Figure D.3. Major Component Location 1TABLE of CONTENTS-THEORY of Operation Section E-1 Control BoardTheory of Operation Figure E.2 General DescriptionInput Power TRIGGER CIRCUITFeedback and Control CIR- Cuits Figure E.4 Feedback & Control CircuitsOptional Circuits Figure E.5 Optional Circuits & Digital Display BoardLN-25 PRO Table of Contents Troubleshooting & Repair Troubleshooting & Repair HOW to USE Troubleshooting GuidePC Board Troubleshooting Procedures Fault Code Description Possible Adjustment Motor Solenoid Test Possible Areas Misadjustments Problems SymptomsRecommended Course of Action LN-25 PRO Test Description Case Removal ProcedureMaterials Needed Procedure Figure F.1 Case RemovalGAS Solenoid Test GAS Solenoid Control BOX Control BOX Cover Contactor Test Control BOX Contactor Drive Motor and Tach Feedback Test Case Control BOX Assembly Motor Overload Test Figure F.5 Control BOX Assembly Contactor Removal and Replacement Procedure Removal Procedure Figure F.6 Control BOXReplacement Procedure Figure F.7 Buss BAR and Mounting BlockLN-25 PRO Front Panel Removal and Replacement Procedure Front Panel Troubleshooting & Repair Gas Hose Control BOX Wire Drive Panel Drive Gear Cover LN-25 PRO PC Board Removal and Replacement Procedure PC BOARD Removal and Replacement Procedure Figure F.11 Control PC Board LocationGAS Solenoid Removal and Replacement Procedure GAS Solenoid GAS Hose Control BOX Lock NUT SET UP Retest After RepairRetest a machine Operation VerificationLN-25 PRO Table of Contents Diagram Section Wiring Diagram LN-25 PRO WiriNG DiaGram lN-25 prO CODEs 11507, 11508 G5681-1 Wiring DIAGRAM- LN-25 PRO Analog WiriNG DiaGram lN-25 prO CODEs 11746, 11747 G5681-3 LN-25 PRO Wire Feeder G5683LN-25 PRO Wire Feeder ElECTriCal DiaGrams G5683-1 Pushbutton G5683-2 LN-25 PRO AnalogG5683 G5683-3 Circuitryconfidential Equipmenttype Xres RXD Work 624 4783-1C0 Flexiblepowerfeede R 50V OF05 Circuitryconfidential S27505-1B0 R2 CW