Miller Electric OM-1589 - Manual (Page 47)

OM-1589 Page 41
13-8. Troubleshooting
Y Disconnect power before troubleshooting.
Trouble Remedy
Pressing gun trigger does not energize
feeder. Welding wire is not energized. Secure plug from gun control cable into Gun Control receptacle on feeder (see Section 3-8).
feeder. Welding wire is not energized.
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 3-11).
Adjust drive roll pressure if necessary (see Sections 3-13 and 3-14).
Replace or clean drive rolls as necessary (see Sections 13-2 and 13-4).
Align drive roll with opening in gun conduit fitting and groove in bearing (see Section 13-4).
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 3-11).
No weld output; gun/feeder does not
work. 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 3-13 and 3-14).
Check and replace liner if necessary (see Section 13-3).
Pressing gun/feeder trigger does not en-
ergize weld control; welding wire is not
energized; shielding gas does not flow. Check gun trigger plug connection on wire feeder front panel (see Section 3-8).
Wire does not feed; burnback in contact
tip. Check drive roll pressure in wire feeder and gun (see Sections 3-13 and 3-14).
tip.
Check and replace liner if necessary (see Section 13-3).
Reinstall voltage sensing lead (see Sections 3-2 and 3-3).
Wire feeds, shielding gas flows, but
welding wire is not energized. See Troubleshooting section in welding power source Owner’s Manual.
Wire feeds erratically. Check drive roll pressure in wire feeder and gun (see Sections 3-13 and 3-14).
Clean or replace drive roll in gun and wire feeder (see Sections 13-2 and 13-4).
Check and replace liner if necessary (see Section 13-3).
Gun overheating (water-cooled
models). 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.