9. Troubleshooting
Fault
Cause
Remedy
The power on
LED is not lit
No mains power
available
Ensure that the machine is connected
to a suitable live mains power source
& is switched on
The fuse in the plug is
no longer working
Replace the fuse
The yellow LED
light is lit
The machine has
overheated because the
working duty cycle has
been exceeded
Stop welding for a while to allow the
machine time to cool down. Ensure
that the fan & output ducts are free
from obstruction & that there is
adequate ventilation space around
the machine
No welding
output
Welding leads are
incorrectly fitted
Check that the leads are fitted to the
correct sockets & that the earth
return is connected to the work piece
MMA Welding
operation is
erratic or not as
required
Incorrect welding
current selected
Check that the current setting is
correct for the selected electrode
Faulty or damp
electrode
Select an alternative electrode
Erratic or
uncontrollable
MMA welding arc
Faulty electrode holder
or bad earth return
connection
Check that the correct sized
components are fitted & that the
electrode holder is in good condition.
Ensure that there is a good earth
return connection with the work
piece
Incorrect wire feed
roller
Check correct size wire feed roller is
fitted
MIG welding wire
feed erratic
Incorrect feed roller
tension
Check feed roller tension
Wire binding on reel
Check wire will easily feed from roll
Nozzle blocked or wrong
size
Check correct size nozzle is fitted in
torch
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