Saf-Fro PRESTOTIG 200 AC/DC, Operator'S Manual, Page: 11 / 436

English 7 English
Rear Panel
A B
C
D
E
A. Power Switch: It turns ON / OFF the input power to the
machine.
B. Input cable: Connect it to the mains.
C. Fan: Do not obstruct or filter the fan inlet. The “F.A.N.”
(Fan As Needed) feature automatically turns OFF/ON
the fan. The fan will start with welding operations and
will continue to run whenever the Machine is welding.
If the Machine doesn’t weld for more than 10minutes,
it will go in Green Mode.
Green Mode
The Green Mode is a feature that puts the machine in
a stand-by condition:

The output is disabled

The fans are speed down

All LEDs on the front panel are switched OFF
except the Power ON LED (solid ON) and the
VRD LED (solid ON) if the VRD is enabled

Display show the dash char
This reduces the amount of dirt that can be drawn
inside the Machine and the power consumption.
To restore the Machine restart to weld or push the TIG
trigger or push any buttons in the front panel or turn
the encoder knob.
NOTE:
If a COOLARC TIG torch cooling unit is
connected to the machine, it will be turned ON/OFF by
the Green Mode feature based also to COOL option.
See Menu SYS section for more details.
NOTE: It is possible to allows the user to enable or
disable the green mode. See Menu SYS section for
more details.
Idle Mode
After 30 minutes without welding the machine will
enter a deep low power mode. It will shut down all
indicators: only Power ON Led is blinking.
To restore the Machine restart to weld or push the
trigger or push any buttons in the front panel or turn
the encoder
Exit procedure will take 6-7s: after this time the unit is
ready to weld.
D. Gas Inlet: Connector for the TIG shielding gas. Use
the supplied connector to connect the machine to the
gas source line. The gas source must have a pressure
regulator and flow gage installed.
E. Power supply socket for Coolarc: 400Vdc socket.
Connect here the Coolarc cooling unit.
Controls and Operational Features
Machine Start-Up:
When the machine is turned ON an auto-test is executed.
The Machine is ready to operate when on the Front
Control Panel lights up the “Power ON” LED, the “A” LED
(placed on the middle of the synoptic) with one of the LED
of the Welding “MODE” command. This is the minimum
condition: depending by the welding selection others
LEDs may be ON.
Front Panel Indicators and Controls
Power ON LED:
This LED blinks during the machine start-up or during
restart after idle mode and lights up steadily when the
machine is ready to operate.
If the Input Voltage Overrange protection becomes active,
the Power ON LED starts blinking and an error code is
shown on the displays. The machine restarts
automatically when the Input Voltage returns in the correct
range. For further detail read the Error Codes and
Troubleshooting section.
If the trigger is pushed before the unit is ready to weld, or
after a weld is completed in GTAW mode, the Power ON
LED will blink at a fast rate. Release the trigger to restore
normal operation.