Lincoln Electric SVM197-A service manual Rotor Resistance Test

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F-8 TROUBLESHOOTING AND REPAIR F-8

TROUBLESHOOTING GUIDE - Observe Safety Guidelines detailed in the beginning of this manual.

PROBLEMS		POSSIBLE AREAS OF					RECOMMENDED
(SYMPTOMS)		MISADJUSTMENTS(S)					COURSE OF ACTION
		OUTPUT PROBLEMS
Low weld output and low auxiliary	1. The generator brushes may be					1.	Perform the Rotor Voltage Test.
output.		worn. See the Maintenance sec-				2.	If the rotor voltage is low, the field
		tion	of this	manual or	contact
		your	local	Lincoln	Electric		capacitor (C1) or bridge (D1) may
							be faulty. Test or replace.
		Authorized Field Service Facility.
	2.	The	engine	RPM may	be low.	3.	Check the rheostat (R1). Normal
							resistance is 3.3 ohm.
						4.	The rotor may be faulty. Perform
							the Rotor Resistance Test.
						5.	The engine RPM may be low.
							Perform the Engine Throttle
							Adjustment Test.
						6.	If engine idle RPM is okay, the
							engine may have lost horsepow-
							er and be in need of major repair.

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.

POWERARC® 5500