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4 Maintenance
4.3 Trouble shooting
Continued
Trouble
Large splatter during
welding
Stuck electrode tips
Shock/noise when
closing
Unstable force at
electrode tips level
74
Possible cause
Abnormal electrode
caps wear
Workpieces are dirty
Welding current is too
low
Welding force too low
Electrode caps are
dirty
Insufficient cooling of
the tips
Secondary current
overload
Welding force too low
Wrong value of the
programmed sheet
thickness
Sheet geometrical is-
sue
Bad parameters
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Action
Further information
Inspect the cooling
circuit.
Dress/change the
electrode caps.
Clean the workpieces.
See
Welding current
is too
low. above
Check the pro-
See Application
grammed force.
manual - Spot options
3HAC050979-001.
Perform a force calib-
ration.
Clean/dress the elec-
trode caps.
Inspect the cooling
circuit.
Dress/change the tips.
Verify that the actual
permanent current is
lower than the expec-
ted rated current.
Check the pro-
See Application
grammed force.
manual - Spot options
3HAC050979-001.
Perform a force calib-
ration.
Check/change the
programmed thick-
ness.
Check/change the
program.
Check parameters,
reload if it is neces-
sary.
Do a parameter tun-
ing.
Product manual - GWT C9
3HAA010198-001 Revision: A
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