Lincoln Electric SVM107-B service manual Welding Problems

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F-13		F-13
	TROUBLESHOOTING & REPAIR
	TROUBLESHOOTING GUIDE	Observe Safety Guidelines
		detailed in the beginning of this manual.

PROBLEMS	POSSIBLE AREAS OF	RECOMMENDED
(SYMPTOMS)	MISADJUSTMENT(S)	COURSE OF ACTION
	WELDING PROBLEMS
The welding arc is “cold.” Engine	1. Check for loose or faulty con-	1. Check for the correct open cir-
runs normally (3700 RPM no load).	nections at the weld output ter-	cuit voltage (OCV) at the welder
Auxiliary power is functioning nor-	minals and welding cable con-	output terminals	(80VAC Max.
mally.	nections.	72VDC Max.).	If the	correct
	2. The welding cable may be too	voltage is present at the output
		terminals, then check for loose
	long or coiled, causing an
		connections on the heavy cur-
	excessive voltage drop.
		rent carrying leads inside the
		RANGER 8.	See	Wiring
		Diagram.
		2. If the OCV is low at the welder
		output terminals, then Perform
		The Engine Throttle Adjustment
		Test.
		3. Perform the Output Rectifier
		Bridge Test.
		4. Check for shorted or grounded
		windings in the reactor and also
		in the main stator. See Wiring
		Diagram.

CAUTION

If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, con- tact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call 1-800-833-9353 (WELD).

RANGER 8