HBS CDi 1502 - Troubleshooting Guide; Personnel Qualification for Troubleshooting; Troubleshooting: Unit Not Operating

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14 Troubleshooting
14 Troubleshooting
Danger from insufciently qualied 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 qualied personnel.
 Inform your dealer or your maintenance department.
Fault Possible cause Fault localisation Fault remedy Performance
Light signal of primary
switch does not light
Primary outlet de-
fective
Check primary outlet *) Replace primary
outlet*)
Qualied specialists
Mains cable broken Check mains cable*) Replace mains
cable*)
Qualied specialists
No LED display at the
front
Fuse F4 10 AT de-
fective
Check mains fuse*) Replace mains fuse
F4 on the front plate
of the stud welding
unit*)
Qualied specialists
Leads interrupted Check leads*) Replace leads*) Qualied specialists
No
display
No ground connection Check ground connec-
tion on workpiece
Tighten ground con-
nection properly
Trained personnel
Gun not connected Check gun connection Connect gun properly Trained personnel
Transition resistance
(between stud and
workpiece) too high
Check material surface Clean or grind materi-
al surface
Trained personnel
Ground cable broken Check ground cable*) Replace ground
cable*)
Qualied specialists
Welding gun cable
broken
Check welding gun
cable*)
Replace welding gun
cable*)
Qualied specialists
No
display
Defective connecting
line of welding gun
Check function of con-
necting line*)
Replace connecting
line*)
Qualied specialists
Welding gun trigger
button defective
Check control cable for
electrical ow with trig-
gered start button*)
Replace welding gun
trigger button*)
Qualied specialists
Control cable broken Check control cable for
electrical ow*)
Replace control
cable*)
Qualied specialists