Lincoln Electric SVM153-A Problems Possible Areas, Symptoms Misadjustments Course of Action

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F-12				F-12
TROUBLESHOOTING & REPAIR
Observe Safety Guidelines		TROUBLESHOOTING GUIDE
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." The	1. Check for loose or faulty con-	1. Check for the correct OCV at
engine runs normally. The auxiliary	nections at the weld output ter-	the welding output terminals. If
power is normal.	minals and welding cable con-	the correct voltage is present at
	nections.	the output terminals, check for
	2. The welding cables may be too	loose connection on the heavy
		current carrying leads inside the
	long or coiled, causing an
		Commander 500.		See the
	excessive voltage drop.
		Wiring Diagram.
	3. Make sure the electrode (wire,	2. If the OCV is low at the welder
	gas, voltage, current etc.) is cor-
		output	terminals,	perform the
	rect for the process being used.
		Engine	Throttle	Adjustment
		Test.
		3. Perform the Output Rectifier
		Bridge Test.
		4. Perform the Stator Voltage
		Test.
		5. Perform the Power Module
		Test.
		6. The Weld Control PC board
		may be faulty.

CAUTION

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

COMMANDER 500