Lincoln Electric SVM145-B service manual Output Problems

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F-5	TROUBLESHOOTING & REPAIR									F-5
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
No welding output in neither Stick		1.	Check the brushes for wear and	1.	Perform the Rotor Resistance
or CV	modes. Also, no auxiliary		proper contact to the rotor slip		Test.
power.	The engine operates nor-		rings.	2.	Perform the		Flashing			and
mally.
		2.	Make sure the engine is operat-		Rotor Voltage		Test.		If	the
			ing at the correct high idle		“flashing” voltage is not present,
			speed (1900 RPM).		the protection board or leads
		3.	Check for loose or faulty con-		#201 or #200		may	be faulty.
					See the Wiring Diagram. Also,
			nections or leads on the auxil-
					make sure	that lead			#5P has
			iary power studs in the control
					continuity	(zero		ohms)		to
			box. See the Wiring Diagram.
					ground.
				3. Check the		field diode and
					capacitor. Replace if necessary.
				4. Perform the Stator Voltage
					Test.
No auxiliary power at the recepta-		1.	The circuit breakers may be	1. Check the		wiring between the
cles. The welding output is normal			tripped. Reset if necessary.		auxiliary receptacles, the con-
and the engine operates normally.		2.	Check for loose or faulty con-		nection studs in the control box,
					and the main stator.				See the
			nections at the auxiliary recep-
					Wiring Diagram.
			tacles.
				2. Perform the Stator Voltage
					Test.

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.

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