Lincoln Electric IM602-A manual Troubleshooting

E-3		TROUBLESHOOTING	E-3
	Observe all Safety Guidelines detailed throughout this manual
	PROBLEMS	POSSIBLE	RECOMMENDED
	(SYMPTOMS)	CAUSE	COURSE OF ACTION

PROBLEMS

Machine has output, but no control.	1. Check the Local/Remote output
		switch (SW3) and associated
		leads. See wiring diagram.
	2.	Make sure the remote control
		leads #75, #76 and /or #77 are
		NOT grounded to either welding
		output.
	3.	Make sure control cable to feeder
		(if used) is connected properly.
	4.	The output control potentiometer
		may be faulty.
	5.	Control board transformer may be
		faulty
	6.	The control or firing board may
		be faulty.
Machine does not have maximum	1. Make sure the correct three-
output.		phase input is applied to the DC-
		655 machine.
	2.	The output control potentiometer
		may be faulty.
	3.	The control or firing board may
		be faulty.
Poor arc striking with semiautomatic	1.	Make sure the mode switch is in
or automatic wire feeders.		the proper position for the
		process.
	2.	Make sure the welding cables
		and connections are secure.
	3.	Check for correct welding proce-
		dures.

Contact your Local Lincoln Authorized Field Service Facility for technical troubleshooting assistance.

CAUTION

If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your Local Lincoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed.

DC-655