HI-FREQ Problems | Lincoln Electric TIG 375 manual

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 375

Image 35

Lincoln Electric TIG 375 manual HI-FREQ Problems

Contents

Precision TIG Safety Depends on You California Proposition 65 Warnings Safety Electric Shock can kill Iii Welding and Cutting Sparks can Cause fire or explosion Sûreté Pour Soudage a LʼArc Précautions DE Sûreté Thank You Table of Contents Precision TIG InstallationRated Input Single Phase only Duty Cycle-Applications Volts at Rated Amperes Amps Additional Output Capacity Recommended Input Wire and Fuse SizesPhysical Dimensions Temperature Ranges Safety Precautions Input and Grounding Connections Stick Electrode Cable Connection Output CABLES, Connections and LimitationsWork Cable Connection Figure A.2 TIG Torch Connection Figure A.3 Auxiliary Power Connections Figure A.4 Robotic Interface Connection Welding Sparks OperationProduct Description Pipe Thawing Equipment Limitations Recommended Processes and EquipmentRecommended Processes Process Limitations Figure B.1 Control Panel Controls and Settings Operation Display TIG Mode Menu Advanced Panel Controls Do not USE 4-STEP if Using AN Amptrol Remote Operation 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 Chart Figure B.6 Gtaw Process Making a TIG Weld with AN AmptrolSmaw Process Optional Equipment AccessoriesFactory Installed Options Field Installed Options Overload Protection MaintenanceSafety Precautions Routine and Periodic Maintenance UNDER-COOLER Service Service ProceduresComponent Access Spark GAP Adjustment HOW to USE Troubleshooting Guide Troubleshooting Course of Action SymptomsOutput Problems GAS Problems Meter Problems HI-FREQ Problems Preset & Output Control Problems TIG Welding Problems Stick Welding Problems TIG Problems Wiring Diagram Wiring Diagram Dimension Print K2622-1 Domestic Precaucion Aviso DE