Kemppi PROMIG EVOLUTION 501 Technical Manual page 19

Troubleshooting
PROBLEM
Welding is breaking
when the welding wire is
touching the piece.
Disturbance in start or
welding is interrupted
without any error
message.
POSSIBLE CAUSE
Short circuit between
cables inside of the torch.
The start line wire may
be in contact with the
brass body of quick
coupling (EURO -
connector). Also moisture
could cause this problem.
REMEDY
Check is there galvanic
connection between
welding current cable and
start lines. Repair or
replace cables if galvanic
connection exist.
Measure resistance
between start lines and
body of the quick coup-
ling (EURO -connector).
Resistance should be
higher than 2.5 Mohm. If
resistance is lower, repair
the MIG gun or change
the body of the quick
coupling (EURO –
connector).