Lincoln Electric IM579 manual Check for proper shielding gas

E-8		TROUBLESHOOTING	E-8
	TROUBLESHOOTING GUIDE		Observe Safety Guidelines
		detailed in the beginning of this manual.
	PROBLEMS	POSSIBLE AREAS OF	RECOMMENDED
	(SYMPTOMS)	MISADJUSTMENT(S)	COURSE OF ACTION
		OUTPUT PROBLEMS
	Machine loses output while weld-	1. Check for proper input voltages
	ing. Fans and display are function-	(per machine nameplate).
	ing properly.	2. Check for balanced three-phase
		input supply voltage.
		3. Check electrode and work
		cables for loose or poor connec-
		tions.

For no apparent reason the weld	1. Check for proper wire feed
characteristics have changed.
	speed setting. In the MIG/ MAG
	and FCAW Modes, check for prop-
	er voltage settings. In the	If all recommended possible areas
	MIG/MAG Pulse Modes, check the
		of misadjustments have been
	arc length trim setting. These con-
		checked and the problem per-
	trols are on the wire feeder.
		sists, contact your local Lincoln
	2. Check for proper shielding gas	Authorized Field Service Facility.
	and gas flow.
	3. Check for loose or faulty weld-
	ing cables.

Machine often “noodle welds” with	1. The machine may be trying to
a particular procedure.	deliver too much power. When the
	average output current exceeds a
	maximum limit, the peak current is
	drastically cut back. Lower the
	welding parameter settings and/or
	increase the stickout length to
	eliminate this problem.

CAUTION

If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, con- tact your local authorized Lincoln Electric Field Service Facility for technical assistance.

POWER WAVE 450