Lampert Werktechnik GmbH
OPERATING MANUAL PUK D5
11. Correcting faults
Fault occurring
Possible cause
Fault rectification
Faults on the welding device
Display is dark
Mains master switch is not
switched on
Check mains master switch and
switch on
Circuit breaker has tripped
Use more powerful mains fuse,
consult an electrician
Device fuse blown
Replace device fuse
No welding current
Welding cable connection
interrupted
Check cable connections
Poor or zero contact with
the workpiece
Establish connection to
the workpiece, fasten contact
clamps directly to the workpiece,
clean the workpiece with the PUK
universal cleaner
Poor welding characteristics
Incorrect shielding gas used
Use recommended inert shielding
gas “Argon 4.6”
Poor ignition characteristic
Electrode clamped loosely in hand
piece
Tighten clamping nut on the hand
piece until hand tight
Oxidation or rusting
Gas pressure too high
Reduce gas flow rate, approx.
2-3 l/min is recommended
Severe oxidation of the welding
points
Incorrect shielding gas used
Use recommended inert shielding
gas “Argon 4.6”
Tungsten embedded in
the workpiece
Electrode pressure on
the workpiece too great
Touch workpiece with extremely
light pressure
Electrode welds to workpiece
Pressure of the electrode on
the workpiece too great
Touch workpiece with extremely
light pressure
Electrode tip melts
Electrode abraded too steeply
Correct the angle of electrode
abrasion, see “Abrading
the electrodes”, approx. 15°
recommended
Static discharge over the surface
of the device
Static charge from the environment Use antistatic foot mat in the working
area, use antistatic cables
Welding process begins, but a
welding point is not produced
Internal protective circuit is
triggered
Switch device off and back on
again
Welding process is triggered
immediately when touching
the workpiece
Malfunction
Immediately put the device out of
operation, contact customer
service
Faults on the microscope
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