Lincoln Electric IM910 manual Contact your local Lincoln

E-2		TROUBLESHOOTING		E-2
	Observe all Safety Guidelines detailed throughout this manual
	PROBLEMS		POSSIBLE	RECOMMENDED
	(SYMPTOMS)		CAUSE	COURSE OF ACTION
			OUTPUT PROBLEMS
Major physical or electrical damage		1.	Contact your local authorized
is evident when the sheet metal cov-			Lincoln Electric Field Service facil-
ers are removed.			ity for technical assistance.
The wire drive turns off periodically		1.	The supply voltage for the LN-15
while operating on an engine drive.			is too low.
				If all recommended possible areas
No shielding gas flow.		1.	The gas bottle empty.	of misadjustment have been
		2.	The gas hose is cut or clogged.	checked and the problem persists,
		3.	The flow meter valve is closed.	Contact your local Lincoln
		4.	The gas solenoid has failed	Authorized Field Service Facility.
		5.	The feed head board has failed.
The shielding gas turns on sporadi-		1.	The pressure in the gas line is
cally, or remains on all the time.			exceeding 80 psi (5.5 bar)
		2.	The gas solenoid has failed.

FEEDING PROBLEM

The wire drive stops feeding wire	1.	The motor has exceeded the cur-
after about 10 seconds.		rent rating.
	2.	Check to make sure the electrode
		slides easily through the liner of
		the gun.
	3.	Verify that the spindle brake is not
		set too tight.
	4.	For best results, use only Lincoln
		electrodes.
	5.	Wait 10 minutes for the wire feed-
		er to cool.
The wire feed speed varies during	1.	The drive rolls are slipping
welding but the meter reading		because of feeding problems.
remains constant	2.	The LN-15 is in CC mode instead
		of CV mode.
	3.	Reduce the spindle brake resis-
		tance.
	4.	Increase the amount of tension in
		the wire drive pressure arm.
	5.	For best results, use only Lincoln
		electrodes.
	6.	Verify on power-up that the LN-15
		is set for CV welding.
The Wire Feed Speed Range is only	1. The 83% wire feed speed dual
50 - 601 in/min ( 1.3 - 15.3 m/min).		procedure is activated with the
		high speed gear. Check dual proce-
		dure switch in gun.

If all recommended possible areas of misadjustment have been checked and the problem persists,

Contact your local Lincoln Authorized Field Service Facility.

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.

LN-15 CONTROL CABLE MODEL (CE)