Miller Electric XR A Owner's Manual page 42

B. Gun Trouble
Trouble
No weld output; gun/feeder does not
work.
Erratic weld output.
Pressing gun/feeder trigger does not en-
ergize weld control; welding wire is not
energized; shielding gas does not flow.
Wire does not feed; burnback in contact
tip.
Wire feeds, shielding gas flows, but
welding wire is not energized.
Wire feeds erratically.
Gun overheating (water-cooled
models).
OM-1581 Page 38
Secure 115 VAC input plug in 115 volts ac receptacle (see Section 4-11).
Place Power switch on welding power source in the On position.
Tighten and clean all connections.
Secure plug from gun control cable into 10-socket receptacle on wire feeder (see Section 4-6).
Reinstall current pick-up tab if applicable (see Section 6-2).
Clean or replace drive rolls. See Troubleshooting section in welding power source Owner's Manual (see
Sections 6-2 and 6-3).
Check and correct drive roll pressure (see Section 4-14).
Clean drive roll or replace drive roll (see Sections 6-2 and 6-3).
Be sure coolant flowrate is at least 1 qt/min (0.95 L/min).
Corrosion buildup in gun decreasing coolant flowrate. Backflush coolant system, clean coolant system
filter, and clean fittings (see Section 4-16).
Remedy