Lincoln Electric SVM134-A service manual Welding Problems

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F-12						F-12
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 loud and spat-	1.	The current setting may be too	1.	Check the engine speed. High
ters excessively.		high for the electrode and		idle speed should be 1600
		process.		RPM. If necessary perform the
	2. The polarity may be wrong for			Engine	Throttle	Adjustment
				Test.
		the electrode and process.
			2. Check the main DC generator
				brushes for good commutation
				and alignment.		Contact the
				Lincoln Electric Service Dept. at
				1-800-833-9353 (WELD).
The welding arc frequently “pops	1. The fine current control field		1.	Check the engine speed. High
out.”		rheostat may be set too low for		idle speed should be 1600
		the process and electrode.		RPM. If necessary perform the
	2.	Check the welding cables for		Engine	Throttle	Adjustment
				Test.
		loose or faulty connections.
			2.	The current range selector
				switch may be faulty. Check for
				proper operation and contact.
			3. Check the DC generator brushes
				for good commutation and align-
				ment.	Contact	the Lincoln
				Electric Service Dept. at 1-800-
				833-9353 (WELD).

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.

CLASSIC I