Lincoln Electric SVM120-A service manual Engine Problems

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F-10					F-10
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
		ENGINE PROBLEMS
Engine will not idle down to low	1.	Make sure the Idler switch (S5)	1. With the Idler switch (S5) in the
speed. Machine has normal weld		is in the “Auto” position.	“AUTO” position and the engine
output and auxiliary power.	2.	Make sure there is NOT an	running, check for the presence
			of 12VDC at	leads #222F to
		external load on the weld termi-
			#214, located at the Idler sole-
		nals nor the auxiliary power
			noid. If 12VDC is present and
		receptacles.
			the idler solenoid is not activat-
	3. Check circuit breaker CB1.		ing, then the solenoid may be
		Reset breaker if “tripped.”	faulty or there is a mechanical
			restriction preventing		it from
			functioning.
			2. If there is NOT 12VDC at leads
			#222F to #214, check the CB1
			circuit breaker. Also check for
			12VDC from lead #222F to lead
			#5 (ground). If 12VDC is pre-
			sent, then check lead #214 for
			continuity (zero Ohms) from the
			idler solenoid to the printed cir-
			cuit board plug 5J1. Also check
			the Idler switch (S5) and associ-
			ated leads.	See	Wiring
			Diagram. If the above are OK,
			then the control board may be
			faulty. Replace.

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 216-383-2531 or 1-800-833-9353.

RANGER 10-LX