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14 Troubleshooting
14 Troubleshooting
Danger from insufficiently qualified operating personnel
‹
Carry out only the work described here on your stud welding unit or stud
welding gun.
‹
Repairs may only be carried out by appropriately qualified personnel.
‹
Inform your dealer or your maintenance department.
Fault Possible cause Fault localisation Fault remedy Performance
Primary switch does not
rest in position 1
Primary switch defec-
tive
Check primary switch*) Replace primary
switch*)
Qualified specialists
Fuse F4 1 AF for prima-
ry switch defective
Check voltage supply of
primary switch*)
Replace fuse F4 1 AF*) Qualified specialists
Primary cable defective Check primary cable for
breaks*)
Replace primary cable*) Qualified specialists
No LED display at the
front
Fuse F5 1 AF defective Check fuse F5 1 AF*) Replace fuse F5 1 AF*) Qualified specialists
No display
No ground connection Check ground connection
on workpiece
Tighten ground connec-
tion properly
Trained personnel
Welding gun not con-
nected
Check welding gun
connection
Connect welding gun
properly
Trained personnel
Transition resistance
(between stud and
workpiece) too high
Check material surface Clean or grind material
surface
Trained personnel
Ground cable broken Check ground cable*) Replace ground cable*) Qualified specialists
Welding gun cable
broken
Check welding gun
cable*)
Replace welding gun
cable*)
Qualified specialists
No display
Defective connecting
line of welding gun
Check function of con-
necting line*)
Replace connecting
line*)
Qualified specialists
Welding gun trigger
button defective
Check control cable for
electrical flow with trigge -
red start button*)
Replace welding gun
trigger button*)
Qualified specialists
Control cable broken Check control cable for
electrical flow*)
Replace control cable*) Qualified specialists