ESAB Aristotig 405 AC/DC, Service Manual

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4 OVERHEATING PROTECTION
• An integrated thermal cut-out in the welding device protects the equipment from
overheating.
• The welding process is interrupted and the fault display (16) indicates error "4" .
• The equipment must be left in that condition to cool with the main switch left in the on posi-
tion and the cooling fans running.
CAUTION! When the error indicator "4" disappears, the position "Electrode" has to be set to the
open circuit voltage on the electrode; on position "TIG" the welding device can now be started with
the torch button. After cooling, the device is reconnected automatically.
Care must be taken to ensure that the electrode does not touch the welding table, the workpiece
or any other electrical conducting object during the cooling phase of the power source in order to
prevent unintentional arc ignition when switching it on again.
An unintentionally ignited arc may damage the electrode holder, the workpiece or the equipment.
5 CONTROL PANEL
1 Potentiometer,
spot time
This potentiometer allows the duration of the spot time to be set
to values in the range from 0.1 to 10 s.
2 Operation
mode selector
• Electrode welding with rod electrodes.
• TIG spot welding
• TIG four-step welding
• TIG two-step welding
3 LED,
external current
selection LED illuminates, when the foot operated or hand operated re-
mote controls are connected and are controlling the welding cur-
rent.
4 LED, mains The green LED illuminates when the device is connected to the
mains and the mains switch is activated.
5 LED,
foot operated
remote control
LED illuminates, when a foot operated remote control is connect-
ed, i.e. that the set point is fixed externally and the arc can be
started using the torch button as well as via the pedal.