Lincoln Electric CV-250 manual Possible Areas Recommended Symptoms

Page 23

E-4

 

TROUBLESHOOTING

 

E-4

 

 

 

 

 

 

 

Observe all Safety Guidelines detailed throughout this manual

 

 

 

 

 

 

 

PROBLEMS

 

POSSIBLE AREAS OF

 

RECOMMENDED

 

(SYMPTOMS)

 

MISADJUSTMENTS(S)

 

COURSE OF ACTION

 

 

 

 

 

 

 

 

 

PROBLEMS

 

 

Thermal Protection Indicator light is

1.

Thermostat circuit has opened.

1.

Allow machine to cool. Be sure to

on.

 

 

 

provide adequate ventilation for

 

 

 

 

 

machine.

 

 

2.

Faulty Control PC Board.

2.

See PC Board Troubleshooting

 

 

 

 

 

Procedure.

Machine does not have maximum

1.

Faulty Control PC Board.

1.

See PC Board Troubleshooting

output

 

 

Procedure.

 

 

2.

Voltage Adjust potentiometer

2.

Check and replace if faulty.

 

 

 

defective.

 

 

 

 

3.

Voltage Adjust potentiometer

3.

Check and repair broken leads.

 

 

 

leads open.

 

 

 

 

 

 

 

Machine will not shut off.

1.

Defective power switch.

1.

Replace.

 

 

 

 

 

Variable or sluggish welding arc.

1.

Poor work or electrode

1.

Check and clean all connections.

 

 

 

connection.

 

 

 

 

2.

Welding leads too small.

2.

Check table in this manual.

 

 

3.

Welding current or voltage

3.

Check procedures for recommended

 

 

 

too low.

 

settings.

 

 

4.

Defective SCR bridge.

4.

Check and replace if defective.

 

 

 

 

 

Digital meters do not light

1.

Faulty Meter PC board.

1.

See PC Board Troubleshooting

- or -

 

 

 

Procedure.

Digital meter display is incorrect.

2.

Faulty Control PC Board.

2.

See PC Board Troubleshooting

 

 

 

 

 

 

 

Procedure.

 

 

 

 

 

 

 

 

 

 

 

 

CAUTION

If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your Local Lincoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed.

CV-250

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Contents Idealarc Safety Depends on YouCalifornia Proposition 65 Warnings SafetyElectric Shock can kill Iii Welding Sparks can cause fire or explosionSûreté Pour Soudage a L’Arc Précautions DE SûretéThank You Table of Contents Technical Specifications Idealarc CV-250 InstallationStacking Safety PrecautionsSelect Suitable Location Input ConnectionsOutput Connections Field Installed OptionsParalleling General Warnings OperationOperating Instructions General Description Operational Features and ControlsDesign Features Power Source OperationThermal Protection Indication Light Controls and SettingsVoltage Control Indicates Warning Information Located on Right Case SideOutput Panel Connections C. Output ConnectorsOverload Protection Auxiliary PowerStarting the Machine Compatible Lincoln Equipment AccessoriesFactory Installed OPTIONS/ACCESSORIES Machine and Circuit Protection MaintenanceGeneral Maintenance Safety PrecautionsHOW to USE Troubleshooting Guide 1TROUBLESHOOTINGE-1Error Code Trouble Remedy TroubleshootingBUILT-IN Diagnostic Routines and Error Codes Problems Machine Troubleshooting GuidePossible Areas Recommended Symptoms Poor arc striking with semiautomatic Poor work connection Options Troubleshooting Guide Meter PC Board Control PC BoardChecking Snubber Circuit Fault Protection OperationOptional K857 Remote Control Check Output VoltageWiring Diagram CV 250 60Hz CV Power Source to AN LN-7 and K857 DiagramsAdapter Source to a K867Power Source to a K867 / K775 / LN 250 CV Power Source to AN LN-25CV Power Source to AN LN-25 / K444-1 Lincoln Power Source PIN Amphenol Installation Instructions TWIST-MATE Cable Plug Installation Instructions Connection of NON-LINCOLN Wire Feeders Dimension Print $700.00 How To Read Shop DrawingsPrecaucion Warnung