Lincoln Electric IM936 manual HI-FREQ Problems

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E-4		TROUBLESHOOTING	E-4

	Observe all Safety Guidelines detailed throughout this manual

	PROBLEMS	POSSIBLE AREAS OF	RECOMMENDED
	(SYMPTOMS)	MISADJUSTMENTS	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 375

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Contents Precision TIG California Proposition 65 Warnings SafetyElectric Shock can kill Welding and Cutting Sparks can Cause fire or explosion Sûreté Pour Soudage a L’Arc Précautions DE SûretéThank You Table of Contents Additional Output Capacity InstallationRated Input Single Phase only Rated Output IECStorage Temperature Range Recommended Input Wire and Fuse SizesTemperature Ranges Operating Temperature RangeSafety Precautions Input and Grounding Connections Stick Electrode Cable Connection Output CABLES, Connections and LimitationsWork Cable Connection Figure A.2 TIG Torch ConnectionFigure A.3 Auxiliary Power ConnectionsFigure A.4 Robotic Interface ConnectionWelding Sparks OperationProduct Description Pipe ThawingEquipment Limitations Recommended Processes and EquipmentRecommended Processes Process LimitationsFigure B.1 Control Panel Controls and SettingsOperation Select Advanced Panel Controls Do not USE 4-STEP if Using AN Amptrol RemoteOperation Stick Welding Features Internal SET UP ControlsTIG Welding Features Figure B.3 Figure B.4 Setup Guidelines for TIG Welding With AN Amptrol TIG Weld Cycle ChartFigure B.6 Recommended Electrode Amperage Ranges Precision TIG Making a TIG Weld with AN AmptrolOptional Equipment AccessoriesFactory Installed Options Field Installed OptionsOverload Protection MaintenanceSafety Precautions Routine and Periodic MaintenanceUNDER-COOLER Service Service ProceduresComponent Access Spark GAP Adjustment HOW to USE Troubleshooting Guide TroubleshootingCourse of Action SymptomsOutput Problems Possible AreasMeter Problems GAS ProblemsHI-FREQ Problems Preset & Output Control Problems TIG Welding Problems Stick Welding ProblemsTIG Problems Precisiontig 375 Wiring Diagram Wiring DiagramDimension Print Precision TIG Warnung Aviso DE