Lincoln Electric TIG 375 manual Symptoms, Course of Action, Output Problems

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E-2

 

TROUBLESHOOTING

E-2

 

 

 

 

 

 

Observe all Safety Guidelines detailed throughout this manual

 

 

 

 

 

 

PROBLEMS

POSSIBLE

RECOMMENDED

 

 

(SYMPTOMS)

CAUSE

COURSE OF ACTION

 

 

 

 

 

 

OUTPUT PROBLEMS

Thermal light comes on

1.

Thermal shut down. Dirt and dust

 

 

 

 

may have clogged the cooling

 

 

 

 

channels inside machine; air

 

 

 

 

intake and exhaust louvers may

 

 

 

 

be blocked.; welding application

 

 

 

 

may exceed recommended duty

 

 

 

 

cycle. Wait until machine cool

 

 

 

 

down and thermal light goes out.

 

 

 

 

Blow out machine with clean, dry

 

 

 

 

low pressure air; check air intake

 

 

 

 

and louvers; stay within recom-

 

 

 

 

mended duty cycle.

 

 

 

2.

Bad thermostat or its connections

 

 

 

 

 

Meter doesnʼt light up

1.

Losing AC supply to Control PC

 

 

 

 

board

 

 

 

2.

Loosing input to machine

 

 

 

3.

Faulty Control PC board

 

 

 

 

 

Has output in

No gas & no hi-freq

1.

Faulty trigger or hand/foot Amptrol

Stick mode

 

 

or connections.

but no output

 

 

 

in Tig mode

 

2.

Faulty Protection PC board or

 

 

 

 

bad connection to Control PC

 

 

 

 

board

 

 

 

3.

Losing trigger supply to Control

 

 

 

 

PC board

 

 

 

 

 

 

 

Gas & hi-freq are o.k.

1.

Faulty Control PC board

 

 

 

 

No output in both Stick and Tig

1.

Bad connection at P4 of Control

modes

 

PC board

 

 

 

2.

Faulty Control PC board

 

 

 

 

 

 

 

 

 

 

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 and Cutting Sparks can Cause fire or explosionSûreté Pour Soudage a LʼArc Précautions DE SûretéThank You Table of Contents Rated Input Single Phase only InstallationDuty Cycle-Applications Volts at Rated Amperes Amps Precision TIGPhysical Dimensions Recommended Input Wire and Fuse SizesTemperature Ranges Additional Output CapacitySafety Precautions Input and Grounding Connections Output CABLES, Connections and Limitations Work Cable ConnectionStick 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 SettingsOperation Display TIG Mode MenuAdvanced Panel Controls Do not USE 4-STEP if Using AN Amptrol RemoteOperation Internal SET UP Controls TIG Welding FeaturesStick Welding Features Figure B.3 Figure B.4 Setup Guidelines for TIG Welding With AN Amptrol TIG Weld Cycle ChartFigure B.6 Making a TIG Weld with AN Amptrol Smaw ProcessGtaw 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 TroubleshootingSymptoms Output ProblemsCourse of Action GAS Problems Meter ProblemsHI-FREQ Problems Preset & Output Control Problems TIG Welding Problems Stick Welding ProblemsTIG Problems Wiring Diagram Wiring Diagram Dimension Print K2622-1 Domestic Precaucion Aviso DE