Lincoln Electric IM602-A manual Trol circuit. #75, #76, #77

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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

PROBLEMS

Variable or sluggish welding arc.	1.	Make sure the mode switch is in
		the proper position for the
		process.
	2.	Make sure the welding cables are
		sized correctly and the connec-
		tions are tight.
	3.	Make sure the welding proce-
		dures are correct.

Output Control Pot not functioning in	1.	Check the Local/Remote control
“Local” control only.		switch and associated leads.
		See wiring diagram.
	2.	The machine output control
		potentiometer may be faulty.
		Also check associated leads.
		See wiring diagram.

No output control in “Remote” control 1.	Output Control Switch in wrong
only.	position.
2.	Faulty Output Control Switch.
3.	Faulty Remote Control Pot.
4.	Leads or connections open in con-
	trol circuit. (#75, #76, #77)

Contact your Local Lincoln Authorized Field Service Facility for technical troubleshooting assistance.

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.

DC-655

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Contents DC-655 Safety California Proposition 65 WarningsE C T R I C S H O C K c a n kill Welding and Cutting Sparks can Cause fire or explosion IiiPrécautions DE Sûreté Sûreté Pour Soudage a L’ArcVSAFETY ViSAFETY Thank You Table of Contents Height Width Depth Weight InstallationTechnical Specifications DC-655 Input Hertz Input Ampere Type 80CSmaw SAW Input Power Three PhaseGmaw Fcaw NRTL/C NrtlSafety Precautions Select Suitable LocationElectrical Input Connections Reconnect Procedure Input Power Supply ConnectionsTable A.1 Output ConnectionsElectrode and Work Cables LOW Inductance TerminalAuxiliary Power Control Connections Terminal Strip 1 T.S.1 Terminal Strip 2 T.S.2Terminal Strips General Warnings OperationGeneral Description Recommended Processes and EquipmentDesign Features and Advantages Welding CapabilityLOCAL/REMOTE Control Switch When this Controls and SettingsPower ON/OFF Switch This tog Output Terminals ON/REMOTE When thisFigure B.2 Lower Case Front Controls & Connections Machine Protection Welding Performance CC Mode ARC Gouging CV Mode CURRENT-LIMITINGCC Mode HOT Start CC Mode ARC ForceAutomatic Wire Feeders AccessoriesSEMI-AUTOMATIC Wire Feeders Field Installed OptionsAccessories Maintenance General MaintenanceSafety Precautions Troubleshooting HOW to USE Troubleshooting GuideProblems Troubleshooting Trol circuit. #75, #76, #77 Problems Troubleshooting Troubleshooting Troubleshooting PC Board Troubleshooting Guide Firing P.C. Board PC Board Troubleshooting Guide Control P.C. Board10TROUBLESHOOTINGE-10 Diagrams Negative PositiveGND Negative Positive Receptacle Convenience, this extended #21 lead should be taped to 655 Wiring Diagram for Codes 10501,10503, 10504 Diagrams Diagrams Diagrams Diagrams Aviso DE Keep your head out of fumes Turn power off before servicing