Lincoln Electric IM597 manual Troubleshooting, Cause, Remedy

TROUBLESHOOTING

TROUBLE	CAUSE	REMEDY
	F2 & F3 (MDA7 7A Slow Blow)	Check AC circuit. Replace fuse
	fuse in feeder blown.
	F1 (4 amp) fuse in feeder blown.	Check motor leads for shorts, then
		replace fuse
No wire feed at torch, feeder
	Micro-switch defective/not being	Replace switch. Check switch for
not operating, i.e., no slave
	activated. Broken electrical cable.	operation. Check micro switch wires for
motor or brake soleniod.
		continuity.
	Relay K2 inoperative.	Check/Replace relay K2.
	Loose J2, J3, P.C. board	Check J2, J3 connectors.
	connector
	Soleniod defective.	Replace soleniod.
Brake soleniod inoperative.	Relay K2 inoperative.	Check for 42VAC across J4-1 and J4-2
		Check relay K2 for AC not present.
	Bad potentiometer.	Check potentiometer with meter.
No wire feed at torch, feeder	Bad torch motor.	Check/Replace motor.
	Broken electrical cable.	Check motor and potentiometer wires
operating properly.
		for continuity.
	Bad speed control/PCB.	Check/Replace P.C. Board.
	Loose or no cable connections.	Check all power connections.
	Relay K2 not sending contactor	Check/Replace relay K2.
	signal.
Wire feeds, but welding wire
	Contactor control cable loose or in	Check power supply owners manual for
is not energized.	wrong position.	location and type of contactor signal
		required, i.e. closing contacts or AC.
	Welding power source not working	Check power supply for proper
	right.	operation.
	Excessive spool drag pressure.	Decrease spool drag pressure inside
		hub.
	Dirty or worn conduit.	Blow out or replace conduit.
Wire feeds erratically.	Incorrect pressure on drive rolls.	Adjust pressure at both feeder and
		torch.
	Idler roll stuck.	Check for lock washer under idler roll, or
		replace if damaged or worn.
	Wrong size contact tip.	See contact tip table.
	Bad potentiometer.	Check with meter.
Wire feeds one speed only	Broken electrical cable in lead	Check potentiometer wires for continuity
	assy.	or shorts.
	Bad speed control.	Check/Replace P.C. Board.
Wire walks out of drive rolls	Idler roll upside-down.	Place groove in idler roll towards top.
	Rear wire guide missing.	Replace wire guide.

K1587-1 Cobramatic® Owner's Manual - Page 17