HI-FREQ Problems | Lincoln Electric IM936 manual

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

Image 35

Lincoln Electric IM936 manual HI-FREQ Problems

Contents

Precision TIG California Proposition 65 Warnings Safety Electric Shock can kill Welding and Cutting Sparks can Cause fire or explosion Sûreté Pour Soudage a L’Arc Précautions DE Sûreté Thank You Table of Contents Additional Output Capacity InstallationRated Input Single Phase only Rated Output IEC Storage Temperature Range Recommended Input Wire and Fuse SizesTemperature Ranges Operating Temperature Range 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 Select 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 Recommended Electrode Amperage Ranges Precision TIG Making a TIG Weld with AN Amptrol 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 Possible Areas Meter Problems GAS Problems HI-FREQ Problems Preset & Output Control Problems TIG Welding Problems Stick Welding Problems TIG Problems Precisiontig 375 Wiring Diagram Wiring Diagram Dimension Print Precision TIG Warnung Aviso DE