Panasonic YC-500WX Operating Instructions Manual page 29

Abnormality
Arc is unstable or
result of welding is
not good.
Arc dies.
Tungsten electrode
1s excessively worn.
Checking Point
· Connection of input and output terminals 1s Ineffective.
· Welding current for tungsten electrode is too small
compared with current suitable for the diameter of
electrode.
· Tungsten electrode is dirty.
· Welding current for welding rod
compared with current suitable for the diameter
Distance between torch electrode and base
too long.
· Welding current for tungsten electrode is too high
compared with current suitable for the diameter of
electrode.
· Shielding gas flow is
short.
· Shielding gas is not flowing.
· TIG torch is connected to "+"terminal.
22
is too small
short or gas postflow
of rod.
metal is
time is