Lincoln Electric IM794 manual Welding Problems

E-4			TROUBLESHOOTING				E-4
		Observe Safety Guidelines detailed in the beginning of this manual.
				POSSIBLE
	PROBLEMS					RECOMMENDED
	(SYMPTOMS)			CAUSE		COURSE OF ACTION
					WELDING PROBLEMS
	Arc is unstable – Poor starting			1. Check for correct input voltage
					to machine. See Installation sec-
					tion, “Electrical Input
					Connections”.
				2.	Check for proper electrode
					polarity for process.
				3.	Check gun tip for wear or dam-
					age and proper size – Replace.
						Contact your local Lincoln
				4.	Check for proper gas and flow	Authorized Field Service Facility.
					rate for process. (For MIG only.)
				5.	Check work cable for loose or
					faulty connections.
				6.	Check gun for damage or
					breaks.
				7.	Check for proper drive roll orien-
					tation and alignment.
				8.	Check liner for proper size.

CAUTION

If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your

LOCAL AUTHORIZED LINCOLN ELECTRIC FIELD SERVICE FACILITY for assistance before you proceed.

SP-170T