14
T
ROUBLESHOOTING
Anomalies
Causes
Remedies
MMA
-TI
G
The device does not deliver any
current and the yellow indicator
thermal default light
is on.
Thermal protection is active.
Wait for the end of the cooling
period, approx 2 minutes. The
indicator light
turns off.
The display is on but the device
does not deliver any current.
The earth clamp or electrode
holder is not properly connected
to the unit.
Check the connections.
If, when the unit is on and you
put your hand on the welding
unit’s body, you feel tingling
sensation.
The welding unit is not correctly
connected to the earth.
Check the plug and the earth of
your electrical network.
The display is on but the device
does not deliver any current.
The cable of the earth clamp or
electrode holder is not connected
to the welder.
Check the connections.
When starting up, the display
indicates
.
The voltage is over the limit
440V +15%.
Have the electrical installation
checked.
TI
G
Unstable arc.
Failure of the tungsten electrode. Ensure the correct size of electrode
is being used.
Use a well prepared tungsten
electrode
Too important gas flow rate.
Reduce gas flow rate.
The tungsten electrode oxidizes
and tarnishes at the end of the
weld.
Welding zone.
Protect welding zone against air
flow.
Fault coming from post-gas or
the gas has been stopped
prematurely.
Check and tighten all gas
connections. Wait until the electrode
cools down before stopping the gas.
The electrode melts.
Polarity error.
Check that the earth clamp is really
connected to +.
