Saf-Fro PRESTOJET 60, Operator'S Manual, Page: 12 / 224

English 8 English
Controls and Operational Features
Machine Auto-Test:
When the machine is turned ON, an auto-test is
executed; during this test all of the LEDs of the
Commands Front Panel lights up. If one or some LED
remains OFF, contact the nearest technical service
center or Lincoln Electric and report the LED Status
found on the machine Front Panel.
Front Panel Controls
Output Current Knob:
Potentiometer used to set the output
current used during cutting. Refer to
the Technical Specification section for
more information about the machine
rated current range.
Gas Purge:
The Output Current Knob completely
rotated counterclockwise enables the
gas purge function.
Power ON/OFF LED:
It lights up when the machine is ON.
Blinking LED: Mains out of range
condition. The machine is disabled:
when the mains returns in the correct
range, the machine restart
automatically.
Note: The Fan could be automatically
switched OFF if the error condition
persist for more than 2seconds.
Output LED:
The cutting torch is energized.
Blinking LED: Internal auxiliary
undervoltage condition. The machine
needs to be turned OFF then ON again
to restart.
Thermal LED:
The machine is overheated and the
output has been disabled. This usually
occurs when the duty cycle of the
machine has been exceeded. Leave
the machine ON to allow the internal
components to cool. When the thermal
LED turns off, normal operation is again
possible.
Low gas pressure condition LED:
With this LED ON the machine stops
cutting or gouging operations. The
machine restart automatically when a
correct gas pressure is detected.
To check / adjust the primary gas
pressure (see recommended values in
the Tecnical Specifications of this
manual):

When this LED lights up, for 10
seconds the machines goes
automatically in Purge mode.

During Purge time check and adjust
the gas pressure through the
manometer and primary gas
pressure regulator knob.

If necessary, check and adjust also
the inlet gas pressure through the
commands of the inlet primary gas.
PIP LED:
Part in place condition: the torch
retaining cap (or the torch connector) is
not properly screwed on the torch head
(or in the machine torch connector).
To restore the machine:

Screw firmly the torch retaining cap
(or the torch connector).

After the torch is restored, the
machine cannot restart for about 5
seconds. During this time the PIP
LED blinks.
(Note: When the LED is blinking, if
another PIP error occours or if the
Torch Trigger pushbutton is
pressed the machine returns to the
error condition: PIP LED returns
steady ON and the restoring
procedure begins again).

When the PIP LED turns OFF the
machine is ready to operate.
PJ60
PJ100
Primary Gas Pressure Gauge and
Regulator Knob:
Allow to regulate and monitoring the
primary gas pressure.
The inlet primary gas pressure is
limited by this pressure regulator,
set at factory at 5.5bar. In case to
adjust the gas pressure, put the
machine in Purge mode.
Cutting Operating Mode Selection:
Press the pushbutton to select the
desired operating mode (the “ON” LED
indicates the selected mode):

CUT (top LED ON): for cutting or
piercing operations on a solid work
piece.

GRID (middle LED ON): for cutting
operations on a grid work piece.

GOUGE (bottom LED ON): for
removing material from a solid work
piece (e.g.: removing a failed
welded bead).
It is possible change the Operating
Mode with the machine at idle and also
during the Purge, Post Flow and
Cooling time.
Pressing the pushbutton during Pilot
Arc or Cutting time has no effects.