Lincoln Electric SVM114-C service manual Hall Effect

Page 44

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F-6

TROUBLESHOOTING AND REPAIR

 

 

F-6

 

 

 

 

 

 

 

 

 

Troubleshooting Guide – See Wiring Diagrams for location of specified

 

Observe Safety Guidelines

components. See Wiring Diagrams for troubleshooting of specific circuits.

 

 

detailed in the beginning of this manual.

 

 

 

 

 

 

PROBLEMS

POSSIBLE AREAS OF

 

 

RECOMMENDED

 

(SYMPTOMS)

MISADJUSTMENT(S)

 

 

COURSE OF ACTION

 

 

 

 

 

 

 

 

 

 

 

FUNCTION PROBLEMS (Continued)

 

 

 

 

 

The wire feed motor runs at a

1. Make sure the mode switch

 

1. Perform

the

Hall

Effect

constant speed with no control.

(S3) is in the CV mode.

 

Module Test.

 

 

NOTE:Loss of tach feedback may

2. Make sure the wire speed

 

2. Perform the Wire Drive Motor

 

result in MAX speed or a

control and the wire speed

 

Test.

 

 

 

 

motor voltage of approx.

range switch (S2)

are set

 

3. The control

board

may be

 

14VDC depending on the

correctly.

 

 

 

 

 

faulty. Replace.

 

 

Control Board being used.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The gas solenoid valve will not

1. Make sure the LN-25™ is

 

1a.Perfor m the Solenoid PC

function.

equipped with a gas solenoid

 

Board and

Gas Solenoid

 

 

valve and properly connected.

 

Valve Test

 

 

 

 

2. Make sure the gas supply is

 

NOTE:Test is code specific.

 

 

adequate and the gas hoses

 

Codes above 10100 may

 

 

are not loose or kinked.

 

or may not have a

 

 

NOTE:Control Boards L12253-[ ]

 

Solenoid PC Board.

 

 

 

 

 

 

 

 

 

or higher do not use a Gas

 

2. If a K434-1 gas flow timer kit is

 

 

Solenoid PC Board.

 

installed in the unit, disconnect

 

 

 

 

 

and plug in the timer jumper

 

 

 

 

 

plug. If the gas solenoid

 

 

 

 

 

functions,

then replace the

 

 

 

 

 

K434-1 kit.

 

 

 

 

 

 

 

3. The contactor board or remote

 

 

 

 

 

control board (if used) may be

 

 

 

 

 

faulty.

 

 

 

 

 

 

 

 

4. The control board may be

 

 

 

 

 

faulty. Replace.

 

 

 

 

 

The contactor does not function.

1. Make certain the LN-25™ is

 

1. Perform the Contactor Test.

 

 

equipped with a contactor and

 

NOTE:Test

is

code

specific.

 

 

properly connected.

 

 

 

 

 

 

Codes above 10100 may

 

 

 

 

 

 

 

2. Check the connections to the

 

or may not have a

 

 

contactor PC board.

 

 

Contactor PC Board.

 

 

NOTE:Control Boards L12253-[ ]

 

2. The Contactor PC board or the

 

 

or higher do not

use a

 

Control Board may be faulty.

 

 

Contactor PC Board.

 

Replace.

 

 

 

 

 

 

 

 

 

 

 

 

CAUTION

If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact the Lincoln Electric Service Department for technical troubleshooting assistance before you proceed. Call 1-888-935-3877.

LN-25™

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Contents Semiautomatic Wire Feeder Safety California Proposition 65 WarningsCan be dangerous Electric Shock can killFumes and Gases Iii Welding and Cutting Sparks can Cause fire or explosionCylinder may explode if damaged Précautions DE Sûreté Sûreté Pour Soudage a L’ArcMaster Table of Contents for ALL Sections Table of Contents Installation SectionInstallation Technical Specifications LN-25Wire Feed Speed CurrentrentSafety Precautions Power Source ConnectionINVERTEC, CV300 and Other Newer Lincoln Power Sources GUN Cable Connection to FeederWith CV Adapter For GMA GUN and CablesWire Feed Drive Roll and Guide Tube Kits Weld Cable ConnectionElectrode Cable Connection Work Cable ConnectionLN-25 Operation Section Read and Understand Entire Section Before Operating Machine OperationWelding Capability Electrode Polarity Switch Wire Feed Mode SwitchWire Speed Dial and Range Switch LN-25 Instruments ControlsGAS Post PRE-FLOW Timers Optional Work Clip LeadAWG Remote ARC Voltage Control OptionalSequence of Operation Loading ElectrodeMounting 22 to 30 LB READI-REELCOILS Mounting 10 to 30 LB SpoolsLoading Wire Drive Idle Roll Pressure SettingGrooves READI-REEL Inside Cage Wires 6OPERATIONB-6Presetting Wire Feed Speed Setting Constant Wire Feed Speed CV ModeSetting ARC Sensing Wire Feed Speed CC Mode Minimum Arc VoltsFigure B.4 VV CC Wire Speed Setting Making a WeldCylinder may explode if damaged Procedure AT END of CoilWelding Motor Overload Shutdown Circuit Protection and Automatic ShutdownOvervoltage Shutdown Accessories Section Accessories Section CAccessories LN-25 Option ChartHow to use Table C.1 Table C.1GAS Solenoid KIT K430-2 for Codes Optional AccessoriesK434-1 GAS Flow Timer KIT K433 Power Source Remote BOX K432 Remote Control Cable AssemblyRemote Output Control Options and Control Cable Assemblies LN-25 Contactor KIT K443-1 for CodesK439 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 KITConnector Must be Insulated in this Area To GUN Switch Connect Leads to Pins a and CStyle a DIA. HoleMaintenance Section Adjusting Speed Sensor Module MaintenanceRoutine Maintenance Calibration of LN-25 Wire Speed Dial LN-25 Figure E.1 Theory of Operation Block Diagram Theory of Operation SectionInput Power Circuit Theory of OperationGeneral Description Control Circuit OperationFeedback and Control Circuits Trigger CircuitOptional Circuits ContactorGAS Solenoid Later ModelsProtective Devices Circuits Control PC Board FusesLN-25 Troubleshooting and Repair Section 2TROUBLESHOOTING and REPAIRF-2 HOW to USE Troubleshooting GuideTroubleshooting and Repair PC Board Troubleshooting ProceduresFeeding Problems Feeding Problems Hall Effect GAS Solenoid Valve and Solenoid PC Board Test Test DescriptionMaterials Needed For Codes below 10500 onlyTest Procedure Screw Wire Reel Retaining CollarCase Door GAS Solenoid ValveFigure F.2 Solenoid Leads Troubleshooting and Repair GAS Solenoid Valve and Solenoid PC Board Test 512624A 621 J11 PC Board for K430 GAS Solenoid KITLN-25 GAS Solenoid Valve and Control PC Board Test For Codes Above 10500 onlyFor Codes Above 10500 only Figure F.5 Control BOX Cover RemovalSolenoid Leads Figure F.6. Solenoid LeadsFigure F.7. Applied Voltage Polarity Control PC Board Solenoid Circuitry TestG3425 667 555 691 621 500 512 690LN-25 Hall Effect Module Test 539 G1757 Hall Effect Module TestG2196 539 541 500 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 TestS20963 Contactor Coil Leads667 28TROUBLESHOOTING and Repair F-28Contactor PC Board Test J14 LN-25 Contactor PC Board Replacement Tools RequiredContactor PC Board Replacement Repair Procedure33TROUBLESHOOTING and Repair F-33 Figure F.17 Control PC Board Replacement Control PC Board Replacement Figure F.21. Control PC Board Codes 9812 and belowFigure F.22. Plug Locations for L12253- Control Board J14Figure F.24. Control Board Replacement PC Board Screw Contactor Replacement For Codes below40TROUBLESHOOTING and Repair F-40 Contactor ReplacementFor 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 SolenoidFigure 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 CableG1757 Figure F.34. Drive Motor Replacement Retest After Repair LN-25 Electrical Diagrams Table of Contents Electrical Diagrams SectionWiring Diagram Above Code 11140 G4679 Optional 42 Volt Remote Output ControlWiring 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 ModelSchematic 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 L12253-3 PC Board Assembly Control Abovr Code 11140 L12253-3L12253 PC Board Assembly Control Code 10556 Thru 10558 G3425-3 G3425PC Board Assembly Control Code 10100 Thru 10500 G2196-1 PC Board Assembly Control below Code 9900 G1757-6 LN-25 ControlSchematic Contactor PC BD Above Code 10500 M10965 ContactorSchematic Contactor PC BD Code 10100 Thru 10500 M17621 Electrical Diagrams Electrical Diagrams PC Board Assembly Contactor Above Code 10500 L10863-1 L10863PC Board Assembly Contactor Code 10100 Thru 10500 L9670-1 PC Board Assembly Contactor below Code 9900 L9185-2
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