Weldclass WeldForce WF-255MST Operating Instructions Manual page 55

Fault
Cold weld puddle
Arc does not have a crisp
sound that short
exhibits when the wire feed
speed and voltage are
adjusted correctly
Table 16
Troubleshooting – MIG Weld Quality
Cause
Loose welding cable connection.
Low power supply voltage.
The MIG torch has been connected
arc to the wrong voltage polarity on the
front panel.
© Weldclass 2019 | E.&O.E. | Edition 2.2
WF-255
Remedy
Check all welding
connections
Contact supply authority
Connect the MIG torch to the
positive (+) welding terminal for
solid wires and negative (-)
welding terminal for gasless
wires.
Refer to the wire manufacturer
for the correct polarity.
MST
cable
55