Lincoln Electric TIG 275 manual HI-FREQ Problems

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E-4		TROUBLESHOOTING	E-4

	Observe all Safety Guidelines detailed throughout this manual

	PROBLEMS	POSSIBLE	RECOMMENDED
	(SYMPTOMS)	CAUSE	COURSE OF ACTION

HI-FREQ PROBLEMS

No hi-freq	1. Circuit breaker CB1 open
	2.	Bad connection at P12 of Control
		PC board
	3.	Spark gaps shorted
	4.	Faulty Control PC board

Hi-freq intensity too weak	1. Dirty spark gap or improper gap
		setting
	2.	Faulty Arc Starter assembly

Hi-freq on continuously in DC Tig	1. Bad connection at P11 of Control
		PC board
	2.	Micro-switch S2A is not engaged &
		disengaged properly when switch-
		ing between DC & AC polarity.
		(S2A locates on the Polarity
		switch)
	3.	Faulty Control PC board

Hi-freq shuts off after starting in AC	1. Micro-switch S2A is not engaged &
Tig		disengaged properly when switch-
		ing between DC & AC polarity.
		(S2A locates on the Polarity
		switch)

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 275

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Contents Precision TIG IP21SSafety California Proposition 65 WarningsElectric Shock can kill Cylinder may explode if damaged Précautions DE Sûreté Sûreté Pour Soudage a L’ArcSafety Safety Thank You Table of Contents Installation Rated Input Single Phase onlyPrecision TIG Recommended Input Wire and Fuse Sizes Physical DimensionsTemperature Ranges Additional Output CapacitySafety Precautions Input and Grounding Connections Work Cable Connection Stick Electrode Cable ConnectionOutput CABLES, Connections and Limitations TIG Torch Connection Figure A.2Auxiliary Power Connections Figure A.3Robotic Interface Connection Figure A.4Operation Product DescriptionPipe Thawing Welding SparksRecommended Processes and Equipment Recommended ProcessesProcess Limitations Equipment LimitationsControls and Settings Figure B.1 Control PanelOperation Do not USE 4-STEP if Using AN Amptrol Remote Advanced Panel ControlsOperation Internal SET UP Controls Stick Welding FeaturesTIG Welding Features Figure B.3 Figure B.4 TIG Weld Cycle Chart Setup Guidelines for TIG Welding with AN AmptrolUsing the Start Pedal Foot Amptrol K870-1 Figure B.5 Making a TIG Weld with AN Amptrol Recommended Electrode Amperage Ranges Precision TIGAccessories Factory Installed OptionsField Installed Options Optional EquipmentMaintenance Safety PrecautionsRoutine and Periodic Maintenance Overload ProtectionService Procedures Component AccessSpark GAP Adjustment UNDER-COOLER ServiceTroubleshooting HOW to USE Troubleshooting GuideSymptoms Output ProblemsCourse of Action Meter Problems GAS ProblemsHI-FREQ Problems Preset & Output Control Problems Stick Welding Problems TIG Welding ProblemsTIG Problems Wiring Diagram Precision TIG 275 Wiring Diagram for CodeDimension Print L11660Precision TIG Precision TIG Warnung Aviso DE