HBS C 08 - Malfunctions and Corrective Actions

C 08 Order No. BA 92-20-262 Issue 01.03.08 33
5.8 Malfunctions and Corrective Actions
Malfunction Possible cause Fault finding Corrective action Carried out by
Welding elements
not firmly attached
Wrong w elding
parameters selected
Check charging
voltage on pow er unit
Change adjusted
parameters
Instructed personnel
Check spring force of
w elding gun
Change adjusted
parameters
Instructed personnel
Plunging speed of
w elding element too low
Check w elding piston
and linear bearing
that they are smooth
running *)
Clean or replace *) Qualified personnel
Scorchings at
w elded element
Chuck is w orn Check chuck f or
possible w ear
Replace chuck Instructed personnel
Lamellas of chuck are not
pre-tensioned
O-rings existing?
Check o-rings for
w ear and fracture
Replace o-rings Instructed personnel
Welding gun does
not w eld
Control cable defective
(w ith present contact
signal on pow er unit)
Check control cable
for electrical flow at
socket (Pin 3 and 4)
of the control cable
socket w ith pressed
w elding gun trigger *)
In case of no flow :
Replace control cable *)
Qualified personnel
Trigger sw itch defective
(w ith present contact
signal on pow er unit)
Check trigger sw itch
for electrical flow
w ith pressed w elding
gun *)
In case of no flow :
Replace micro sw itch *)
Qualified personnel
Welding cable defective
(no contact signal on
pow er unit)
Check, w hether
w elding cable is
connected to pow er
unit
Connect w elding cable Instructed personnel
Check w elding cable
for electrical flow *)
In case of no flow :
Replace w elding cable
and/or connection cable *)
Qualified personnel
Ground connection
defective (no contact
signal on pow er unit)
Check, w hether
ground cable is
connected to
w orkpiece
Connect ground cable Instructed personnel
Check ground cable
for electrical flow
In case of no flow :
Replace ground cable
Instructed personnel
Pow er unit defective Follow the
instructions of the
connected pow er
unit
Repair required Factory service or
authorized agencies
Actions marked with *) must only be carried out by qualified
electricians!
If none of the actions is successful, please contact our
service department.
5 Stud Welding Procedure
5.8 Malfunctions and Corrective Actions