Miller Electric OM-1589 Troubleshooting, Disconnect power before troubleshooting, Trouble Remedy

11-9. Troubleshooting

			Y Disconnect power before troubleshooting.
	Trouble		Remedy
Pressing gun trigger does not energize			Secure plug from gun control cable into Gun Control receptacle on feeder (see Section 3-8).
feeder. Welding wire is not energized.
			Have nearest Factory Authorized Service Agent check optional water flow switch, if applicable.
Shielding gas does not flow.
Wire feeds, shielding gas flows, but			See Troubleshooting section in welding power source manual.
welding wire is not energized.
Wire feeds erratically.			Check position of Motor Torque switch (see Section 3-11).
			Adjust drive roll pressure if necessary (see Sections 3-13and 3-14).
			Replace or clean drive rolls as necessary (see Sections 11-2and 11-4).
			Align drive roll with opening in gun conduit fitting and groove in bearing (see Section 11-4).
Arc varies and welding wire is kinked			Place Motor Torque switch in low torque position if welding with .030 (0.8 mm) aluminum welding wire (see
when feeding out gun.			Section 3-11).
No weld output; gun/feeder does not			Check gun trigger plug connection on wire feeder front panel (see Section 3-8).
work.
			Place Power switch on welding power source in the On position.
			Place Power switch on the wire feeder in the On position (see Section 4-4).
Erratic weld output.			Tighten and clean all connections.
			Check drive roll pressure in wire feeder and gun (see Sections 3-13and 3-14).
			Check and replace liner if necessary (see Section 11-3).
Pressing gun/feeder trigger does not en-			Check gun trigger plug connection on wire feeder front panel (see Section 3-8).
ergize weld control; welding wire is not
energized; shielding gas does not flow.
Wire does not feed; burnback in contact			Check drive roll pressure in wire feeder and gun (see Sections 3-13and 3-14).
tip.
			Check and replace liner if necessary (see Section 11-3).
			Reinstall voltage sensing lead (see Sections 3-2and 3-3).
Wire feeds, shielding gas flows, but			See Troubleshooting section in welding power source Owner’s Manual.
welding wire is not energized.
Wire feeds erratically.			Check drive roll pressure in wire feeder and gun (see Sections 3-13and 3-14).
			Clean or replace drive roll in gun and wire feeder (see Sections 11-2and 11-4).
			Check and replace liner if necessary (see Section 11-3).
Gun	overheating	(water-cooled	Be sure coolant flowrate is at least 1 qt/min.
models).
			Corrosion buildup in gun decreasing coolant flowrate. Backflush coolant system, clean coolant system
			filter, and clean fittings.

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