Miller XR-15A User Manual

OM-236297 Page 22
7-6. Removing Diffuser In Air And Water-Cooled Pistol-Grip Guns
Ref. 803 348-G
! Turn Off welding power source and
water supply.
! Water in gun parts can cause elec-
tric shock and can lower weld quali-
ty.
Always point gun downward when
removing water-cooled barrel to
keep water out of gun parts.
Wipe gun dry before putting it back
together.
1 Nozzle
2 FasTip
To remove, see Section 7-2.
3 Diffuser
Remove diffuser and replace.
Tools Needed:
3/8 in.
1
23
Air Cooled Head Tube Assembly
7-7. Troubleshooting
! 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 5-2 or 5-3 as applicable).
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.
Adjust drive roll pressure if necessary (see Section 5-6).
Clean or replace drive rolls as necessary (see Section 7-3).
No weld output; gun/feeder does no
t
work.
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.
Erratic weld output.
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).
Wire does not feed; burnback in contac
t
tip.
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).
Wire feeds erratically.
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).
Gun overheating (water-cooled
models).
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.

Miller XR-15A Specifications

General

Brand	Miller
Model	XR-15A
Category	Welding System
Language	English