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TROUBLESHOOTING
Symptom
Causes
Remedies
The device does not deliver any
current and the yellow thermal
default light
is on.
Thermal protection is on.
Wait for the end of the cooling
period, approx. 2mins. The light
will turn 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
When starting up, the display
indicates for one second and
turns off.
The voltage is not included in the
range 230V +/- 15% for the Tig
208 or 85-265V for the TIG 207 FV
Check the electrical installation.
Unstable arc
Failure of the tungsten electrode
Ensure the correct size of Electrode
is being used.
Use a well prepared tungsten
electrode
With weak currents, increase the
frequency
Gas flow is too high
Reduce gas flow rate
The tungsten electrode oxidizes
and tarnishes the end of the weld.
Unprotected welding zone
Protect welding zone against air
flow (Post-gas) whilst cooling.
Failure of post-gas
Increase duration of post-gas.
Check and tighten all gas
connections
The electrode melts Polarity error
Check that the earth clamp is
properly connected to +ve
Balance too significant, frequency
too low
17


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