Lincoln Electric SVM168-B service manual Welding Problems

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F-13	TROUBLESHOOTING & REPAIR					F-13
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 1-888-935-3877.

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