Miller Electric XR Control manual Troubleshooting, Disconnect power before troubleshooting

7-13. 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 5-3or 5-5as appli-
feeder. Welding wire is not energized.			cable).
Shielding gas does not flow.
			Have nearest Factory Authorized Service Agent check optional water flow switch, if applicable.
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 6-2).
			Adjust drive roll pressure if necessary (see Section 5-12).
			Clean or replace drive rolls as necessary (see Sections 7-2and 7-6).
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 6-2).
No weld output; gun/feeder does not			Check gun trigger plug connection on wire feeder front panel (see Sections 5-3and 5-5).
work.
			Place Power switch on welding power source in the On position.
Erratic weld output.			Tighten and clean all connections.
			Check drive roll pressure in wire feeder and gun (see Section 5-12).
			Check and replace liner if necessary (see Section 7-3and 7-8).
Wire does not feed; burnback in contact			Check drive roll pressure in wire feeder and gun (see Section 5-12).
tip.
			Check and replace liner if necessary (see Section 7-3and 7-8).
			Reinstall voltage sensing lead (see Section 5-1).
Wire feeds erratically.			Check drive roll pressure in wire feeder and gun (see Section 5-12).
			Clean or replace drive rolls as necessary (see Sections 7-2and 7-6).
			Check and replace liner if necessary (see Section 7-3and 7-8).
Gun	overheating	(water-cooled	Be sure coolant flow rate is at least 1 qt/min.
models).
			Corrosion buildup in gun decreasing coolant flow rate. Backflush coolant system, clean coolant system
			filter, and clean fittings.
Voltmeter does not display voltage			If welding power source does not support pins F and H, a volt sense lead kit must be installed in feeder
			(see Section 5-7and 5-8). Volt sensing lead kit 209867.

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