Lincoln Electric SVM204-A service manual Engine RPM adjustment, Procedure, Adjustment procedure

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F-7 TROUBLESHOOTING AND REPAIR F-7

Observe Safety Guidelines detailed in the beginning of this manual.

PROBLEMS	POSSIBLE AREAS OF	RECOMMENDED
(SYMPTOMS)	MISADJUSTMENT(S)	COURSE OF ACTION
	OUTPUT PROBLEMS
Engine will not idle down. Weld	1. Check that the engine switch is	1. The idle solenoid may be
and auxiliary outputs are normal.	in the “Auto” position.	improperly adjusted. Perform
	2. Check that the engine choke is	the Engine RPM adjustment
		procedure.
	fully open.
	3. There may be a load on the	2. With the engine running, place
		the engine switch in the “Auto”
	weld or auxiliary output.
		position. Check for battery
	Disconnect all cables and cords.
		voltage at the idle solenoid,
		lead 213B. if battery voltage is
		not present, check engine
		switch, connector P4/J4, and
		leads 213A and 213B.
		3. If battery voltage was detected
		in step #2 above, check
		connector P4/J4, leads 215
		and 215A.
		4. Check for AC voltage at leads
		260 (J2-3) and 261 (J2-4).
		With no load on either the weld
		or auxiliary output, the meter
		should read about 26 mV. If
		the voltage is significantly
		higher than this, the toroidal
		current transformer may be
		faulty, or improperly wired.
		This may also indicate a load
		on machine input or faulty
		internal components drawing
		current.
		5. If the above readings are
		normal, replace the PC board.

Engine idles own but will not stay	Low idle ROM may be set too low.
at low idle.	Perform the engine RPM
	adjustment procedure.

CAUTION

If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact the Lincoln Electric Service Department for technical troubleshooting assistance before you proceed. Call 1-888-935-3877.

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