ESAB PEI Instrucciones De Uso página 54

GB
Emergency switch, S4 (Red)
The Emergency switch is connected directly to the
welding power sources control circuit.
Push- -button, S1 (Green) – welding process start.
Push--button with lamp.
The lamp is on for 2 seconds after the welding power source
has been switched on .
If, after this time, the lamp starts to flash, it means that the unit
is not ready due to some false signal during the initial period.
For instance, if, for some reason, the welding power source was
switched on during the initial period, the controller is blocked until
there is no voltage on the rectifier output. The same if current is
present, or inching switch, or any of the push--buttons are pressed
during the initial period after powering.
Start is disabled if:
inching is performed,
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tractor is already switched on (by means of Push--button S3),
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there is a signal from the proximity switch, corresponding to the travel direction,
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there is no water--flow signal (only when a coolant flow guard is used for gas
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shielded welding).
The control of the welding process is performed according to the required sequence,
including gas pre--flow, direct or scratch start, burn--back time, and gas post--flow.
The lamp is on during welding.
The welding process is switched off if:
Push--button S2 is pressed,
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a signal from appropriate proximity switch is present,
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travel direction was changed
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(by means of toggle switch S6)
water--flow guard signal disappeared,
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more then 1s long short circuit is sensed
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(voltage less then 10V and current still present)
Push- -button, S2 (Red) – switches off the welding process and travel.
Push- -button, S3 (White) - - switches on the travel
Operation of this button is disabled during the welding.
The travel is switched off if:
Push--button "0" is pressed,
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a signal from appropriate proximity switch is present,
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travel direction was changed (by means of toggle switch S6).
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