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12 Troubleshooting
12
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
Welding elements not
firmly attached
Wrong welding parame-
ters selected
Check adjusted parame-
ters on stud welding unit
Change adjusted para-
meters
Trained personnel
Plunging speed of wel-
ding element too low
Check welding piston and
linear bearing for ease of
movement*)
Clean or replace*)
Qualified specialists
Scorching at welded
element
Chuck defective
Check chuck for possible
defects
Replace chuck
Trained personnel
Lamellas of chuck are
not pretensioned
O-rings existing?
Check o-rings for possible
defects
Replace o-rings
Trained personnel
Welding gun does not
weld
Control cable defective
(with present contact
signal on stud welding
unit)
Check control cable for
electrical flow at control
cable sleeve (Pin 3 and 4)
with pressed welding gun
trigger*)
In case of no flow:
Replace control cable*)
Qualified specialists
Micro switch defective
(with present contact
signal on stud welding
unit)
Check micro switch
for electrical flow with
pressed welding gun
trigger*)
In case of no flow:
Replace micro switch*)
Qualified specialists
Welding current cable
defective (no contact
signal on stud welding
unit)
Check, whether welding
current cable is connected
to stud welding unit in a
technically correct way
Connect welding cur-
rent cable
Trained personnel
Check welding current
cable for electrical flow*)
In case of no flow:
Replace welding
current cable and/or
connecting cable*)
Qualified specialists
Ground connection
defective (no contact
signal on stud welding
unit)
Check, whether ground
cable is connected to
workpiece in a technically
correct way
Connect ground cable
Trained personnel
Check ground cable for
electrical flow*)
In case of no flow:
Replace ground cable*)
Qualified specialists
Stud welding unit
defective
Follow the instructions
of the connected stud
welding unit
Repair required
Factory service or
authorized agencies
Summary of Contents for 92-20-275
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