Welding Gun - Inspect for cracks, leaks, loose hose, and electrical
5.
connections; the nozzle, adapter, guide tube, gun tube, and gun
barrel for weld spatter, and obstructions.
6.
Fuse and Fuse Holders - Inspect for damaged holders, loose electrical
connections, and for defective or missing fuses.
7.
Controls - Inspect the controls for damage. With the unit operating,
inspect for improper operation.
TROUBLE SHOOTING
Malfunction
Possible Cause
Corrective Action
1.
Frequent "Burn-back"
Electrode wire
Increase dial setting on
control monitor.
(The term is described
speed through gun
in the section on
too slow.
"Operation")
2.
Welding power supply Reduce current setting
Same as 1 above.
current setting too on Welding power supply.
high.
Repair or replace guide
tube as described under
Operating Maintenance.
Check all cable connec-
3.
Same as 1 above.
Poor cable
connection.
tions for tightness.
4.
Connect ground cord as
Same as 1 above.
Ground cord from
shown in section on
control monitor to
negative terminal
Connections or check
of welding power
for breaks. Repair or
replace guide tube as
supply not connected
as described under Opera-
or broken(possibly
ting Maintenance.
internally especial-
ly at terminal.)
1 Amp Fuse in con-
5.
Replace fuse.
Same as 1 above.
trol monitor blown.
Check for burrs in guide
6.
Electrode wire feed
Same as 1 above.
tube, make sure swing arm
through welding gun
spring pressure is ad-
obstructed.
justed properly. Check
for excessive breaking on
electrode wire spool. Re-
pair or replace guide tube
as described under Opera-
ting Maintenance.