- 31 -
No.
Problem
Root cause
What to do
5
Unstable arc and
excessive
spatter.
Welding parameters do not
match or irregular operation.
Readjust parameters or
improve operation.
Badly worn contact tip.
Replace contact tip.
6
CO
2
regulator
does not heat
the gas.
CO2 regulator damaged.
Replace CO2 regulator.
Broken thermistor on the
heating supply.
Replace the thermistor.
7
When the torch
trigger is pressed
and held, wire
feed is normal
but no gas flow.
Damaged control circuit
board.
Replace the control circuit
board.
Damaged solenoid valve.
Replace the solenoid valve.
8
When the torch
trigger
is
pressed
and
held, wire feeder
fails and there is
no indication of
open
circuit
voltage.
Torch trigger damaged.
Replace the torch or
trigger.
Broken wire feeding control.
Repair the wire feeding
control cable.
Damaged control circuit
board.
Replace the control circuit
board.
