Lincoln Electric IM703-A manual TIG Problems

Page 37

E-7

 

TROUBLESHOOTING

E-7

 

 

 

 

 

 

Observe all Safety Guidelines detailed throughout this manual

 

 

 

 

 

 

PROBLEMS

POSSIBLE AREAS OF

RECOMMENDED

 

 

(SYMPTOMS)

MISADJUSTMENTS

COURSE OF ACTION

 

 

 

 

 

 

TIG PROBLEMS

Arc "pulsates" in AC polarity,

DC

1.Micro switch S2A on polarity switch

polarity is o.k.

 

 

does not open in AC polarity

 

 

 

 

 

Black area along weld bead

 

1.

Oily or organic contamination from

 

 

 

work piece

 

 

 

 

2.

Tungsten electrode may be conta-

 

 

 

minated

 

 

 

 

3.

Leaks in gas line, torch, or con-

 

 

 

nections

 

 

 

 

 

Output quits momentarily; gas flow

1.

May be caused by hi-freq interfer-

and hi-freq are also interrupted

 

 

ence. Check that machine is

 

 

 

grounded

properly. Surrounding

 

 

 

machines that generate hi-freq

 

 

 

also should be properly grounded.

 

 

2.

Ground connection of Protection

 

 

 

PC board may has become loose

 

 

3.

Ground

connection

of

 

 

 

Bypass/Stabilizer PC board

may

 

 

 

has become loose.

 

 

 

 

 

 

 

 

 

 

 

 

 

If all recommended possible areas of misadjustment have been checked and the problem persists, Contact your local Lincoln Authorized Field Service Facility.

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.

PRECISION TIG 375

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Contents Precision TIG 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 Rated Input Single Phase only InstallationDuty Cycle-Applications Volts at Rated Amperes AmpsPhysical Dimensions Recommended Input Wire and Fuse SizesTemperature Ranges Additional Output CapacitySafety Precautions Input and Grounding Connections Work Cable Connection Output CABLES, Connections and LimitationsStick Electrode Cable Connection Figure A.2 TIG Torch ConnectionFigure A.3 Auxiliary Power ConnectionsFigure A.4 Robotic Interface ConnectionProduct Description OperationPipe Thawing Welding SparksRecommended Processes Recommended Processes and EquipmentProcess Limitations Equipment LimitationsFigure B.1 Control Panel Controls and SettingsMinimum Output Control and Display Switch Advanced Panel Controls Do not USE 4-STEP if Using AN Amptrol RemotePulse Background Current Control TIG Welding Features Internal SET UP ControlsStick Welding Features Figure B.3 Figure B.4 Setup Guidelines for TIG Welding with AN Amptrol TIG Weld Cycle ChartUsing the Start Pedal Foot Amptrol K870-1 Figure B.5 Smaw Process Making a TIG Weld with AN AmptrolGtaw Process Factory Installed Options AccessoriesField Installed Options Optional EquipmentSafety Precautions MaintenanceRoutine and Periodic Maintenance Overload ProtectionComponent Access Service ProceduresSpark GAP Adjustment UNDER-COOLER ServiceHOW to USE Troubleshooting Guide TroubleshootingOutput Problems SymptomsPossible Areas Course of ActionGAS Problems Meter ProblemsHI-FREQ Problems Preset & Output Control Problems TIG Welding Problems Stick Welding ProblemsTIG Problems Precision TIG 375 Wiring Diagram for Code MID TIG PrecisionDimension Print K1833-1 DOMESTIC, K1833-2 Canada and K1834-1 Export Precision TIG Warnung Aviso DE
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