81
M1.3.TIG200PAC.NLFREN 21052019
EN
T
I
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Black welding spot
Welding spot is poorly protected
and has oxidation
1. Make sure the argon cylinder valve
is open and has enough pressure. If
the internal pressure is lower than 0.5
Mpa, please refill the gas.
2.
Please check if the argon flow is normal
or not. You may choose different flow
according to different welding current.
But under-volume gas flow may result in
incomplete coverage of welding spot.
We suggest the min argon flow of 5 l/
min no matter how small the welding
current is.
3. Please make sure the well sealing of all
gas circuit as well as gas purity.
4.
Please check if there is strong airflow in
the working environment.
Difficult arc ignition, easy arc
breaking
Poor quality tungsten electrode
or severe oxidation of tungsten
electrodes
1. Change good quality tungsten
electrodes
2.
Remove the oxidation layer.
3.
Prolong the post-flow time so that to
avoid tungsten oxidation
4. Adjust the spark gap(around 0.8 mm)
Unstable welding current
during welding
Big fluctuation of network voltage
or poor connection with power
grid
Interference from other equipment
1. Make sure the power grid is normal
and well connection of power source
connector
2. Use different power cables for those
severe interference equipments
Other failures
Please contact the technical service of your
dealer
Please fix the welding failures timely. Only qualified personal can fix welders. Disassemble or
overhaul welders by disqualified personnel is prohibited, for there might be serious danger or
bigger damages of other critical components�
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