Lincoln Electric SVM175-A Tests, Engine Throttle, Adjus ment Test, Brush and Slip Ring

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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
		POWER OUTPUT PROBLEMS
No auxiliary power at one or more		1. Check for loose or faulty con-	1. Check for tripped circuit break-
receptacles, or at the 14 pin		nections at any cords attached	ers and/or tripped GFCI recep-
Amphenol receptacle. Weld output		to the auxiliary output recepta-	tacles.
is normal, and the engine operates		cles, or to the 14 pin Amphenol	2. Perform the Stator Voltage
normally.		receptacle.	Tests.
The machine has low welding out-		1. The engine RPM may be too	1. The high idle speed may be low.
put and low auxiliary output.		low.	Perform		the Engine Throttle
		2. The brushes may be worn,	Adjus ment Test.
		sticking, or poorly seated.	NOTE: If the engine high idle RPM
			is normal, but the engine slows
			down	excessively when the
			machine is placed under a normal
			welding or auxiliary load. The
			engine may have lost horsepower,
			and may be in need of service.
			NOTE: Normal Full load engine
			speed should be about 3500 RPM.
			2. Inspect and, if necessary, ser-
			vice the brushes and slip rings
			S	vice procedure.
			per the		Brush and Slip Ring
			3. Perform		the Rotor Voltage
			T st.
			4. 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 1-888-935-3877.

RANGER 305D