Miller Electric XR Control - Manual (Page 46)

OM-1594 Page 40
7-13. Troubleshooting
Y Disconnect power before troubleshooting.
Trouble Remedy
Pressing gun trigger does not energize
feeder. Welding wire is not energized.
Shielding gas does not flow
Secure plug from gun control cable into Gun Control receptacle on feeder (see Section 5-3 or 5-5 as appli-
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
welding wire is not energized.
See Troubleshooting section in welding power source manual.
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 7-2 and 7-6).
Arc varies and welding wire is kinked
when feeding out gun.
Place Motor Torque switch in low torque position if welding with .030 (0.8 mm) aluminum welding wire (see
Section 6-2).
No weld output; gun/feeder does not
work
Check gun trigger plug connection on wire feeder front panel (see Sections 5-3 and 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 7-3 and 7-8).
Wire does not feed; burnback in contact
tip
Check drive roll pressure in wire feeder and gun (see Section 5-12).
tip.
Check and replace liner if necessary (see Section 7-3 and 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 7-2 and 7-6).
Check and replace liner if necessary (see Section 7-3 and 7-8).
Gun overheating (water-cooled
models)
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 5-7 and 5-8). Volt sensing lead kit 209867.