Lincoln Electric INVERTEC 165SX Operator's Manual page 11

Troubleshooting procedure
Types of malfunctioning / welding faults – causes –
remedies.
TYPES OF MALFUNCTIONING
WELDING FAULTS
The generator does not weld: the
digital switch is not lit.
During welding suddenly
outgoing current is interrupted, the
orange led goes on.
Welding power reduced.
Excessive jets.
Craters.
Inclusions.
Inadequate penetration.
Sticking.
Blowing and porosity.
Jacks.
The electrode fuses in TIG.
English
POSSIBLE CAUSES
The main switch is off.
The power lead is interrupted (lack of
one or two phases).
Other.
the Overheating has occurred and the
automatic protection has come on.
(See work cycles).
Outgoing wires are
attached. A phase is missing.
Welding arch too long.
Welding current too high.
Fast removal of the electrodes.
Inadequate cleaning
distribution of coating.
Faulty movement of the electrodes.
Forward speed too high.
Welding current too low.
Welding arch too short.
Current too low.
Damp electrodes. Arch too long. Wrong
torch polarity.
Currents too high. Dirty materials.
Wrong torch polarity.
Type of gas not suitable.
CONTROLS AND REMEDIES
Switch on mains.
Verify and repair.
Ask
Assistance Centre.
Keep generator switched on and wait till
temperature has dropped again (10-15
minutes) to the point where the orange
switch goes off again.
Check that wires are intact, that the
not correctly pliers are sufficient and that they are
applied to welding surface clean from
rust, paint or oils.
Wrong torch polarity, lower the current
values.
and bad
Increase current values.
9
for the intervention of the
English