Lincoln Electric IM 513-B manual Troubleshooting

TROUBLESHOOTING

TROUBLE				CAUSES		WHAT  TO  DO
3. Machine does not have			a.	Voltage adjust potentiometer leads	a.	Check and repair broken leads.
maximum output.				open.
			b.	Voltage adjust potentiometer	b.	Refer to procedure for checking
				defective.		Voltage Control Potentiometer on
						Machine.
			c.	Faulty P.C. Board.	c.	Refer to Procedure for Replacing
						P.C. Boards.
4. Poor welding charac-			a.	Poor work or electrode connection.	a.	Check and clean all connections.
teristics.	Poor	arc
striking with sticking or			b.	Improper settings for wire feed	b.	Refer to a welding procedures guide
“blast-offs”,weld poros-				speed and volts.		for proper settings.
ity, narrow and ropey
looking	bead,	or	c.	Capacitor Bank Contactor not	c.	Refer to the procedure for Checking
electrode stubbing into				working.		the Capacitor Bank Contactor CR3.
the plate.
			d.	Capacitors in power source output	d. Replace entire bank of capacitors,
				circuit failed. A failure is indicated		observe correct polarity. Do not
				if the small vent plug on the top of		replace individual capacitors.
				a capacitor is raised or blown out.		WARNING: The liquid electrolyte in
						these capacitors is toxic. Avoid con-
						tact with any portion of your body.
						Clean up vented electrolyte using
						rubber gloves and a water damp-
						ened cloth. Any electrolyte which
						gets on skin, clean with soap and
						water.
			e.	Opening in feedback circuit.	e.	Check wiring and P.C. Board wiring
						harness plugs. Pay special attention
						to leads 667 and 621.
			f.	Faulty P.C. Board.	f.	Refer to procedure for replacing P.C.
						Board.

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