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Miller XR-15W オーナーズマニュアル

7-6. Removing Diffuser In Air And Water-Cooled Pistol-Grip Guns

1
!
Turn Off welding power source and
water supply.
!
Water in gun parts can cause elec-
tric shock and can lower weld quali-
ty.

7-7. Troubleshooting

Trouble
Pressing gun trigger does not energize
feeder. Welding wire is not energized.
Shielding gas does not flow.
Wire feeds, shielding gas flows, but
welding wire is not energized.
Wire feeds erratically.
No weld output; gun/feeder does not
work.
Erratic weld output.
Wire does not feed; burnback in contact
tip.
Wire feeds erratically.
Gun
overheating
(water-cooled
models).
OM-236297 Page 22
2
3
Air Cooled Head Tube Assembly
Always point gun downward when
removing water-cooled barrel to
keep water out of gun parts.
Wipe gun dry before putting it back
together.
Secure plug from gun control cable into Gun Control receptacle on feeder
(see Section 5-2 or 5-3 as applicable).
Have nearest Factory Authorized Service Agent check optional water flow switch, if applicable.
See Troubleshooting section in welding power source manual.
Adjust drive roll pressure if necessary (see Section 5-6).
Clean or replace drive rolls as necessary (see Section 7-3).
Check gun trigger plug connection on wire feeder front panel (see Sections 5-2 and 5-3).
Place Power switch on welding power source in the On position.
Tighten and clean all connections.
Check drive roll pressure in wire feeder and gun (see Section 5-6).
Check and replace liner if necessary (see Section 7-5).
Check drive roll pressure in wire feeder and gun (see Section 5-6).
Check and replace liner if necessary (see Section 7-5).
Reinstall voltage sensing lead (see Section 5-1).
Check drive roll pressure in wire feeder and gun (see Section 5-6).
Clean or replace drive rolls as necessary (see Section 7-3).
Check and replace liner if necessary (see Section 7-5).
Be sure coolant flow rate is at least 1 qt/min.
Corrosion buildup in gun decreasing coolant flow rate. Backflush coolant system, clean coolant system
filter, and clean fittings.
1
Nozzle
2
FasTip
To remove, see Section 7-2.
3
Diffuser
Remove diffuser and replace.
!
Disconnect power before troubleshooting.
Remedy
Ref. 803 348-G
Tools Needed:
3/8 in.