Section 4 Operation; Operation; Powercut 875 Controls - ESAB Powercut 875 Manuel D'instruction

sEctIoN 4
WARNING
ElEctrIc shocK can kill.
• Do NOT operate the unit with the cover re-
moved.
• Do NOT apply power to the unit while holding
or carrying the unit.
• Do NOT touch any torch parts forward of the
torch handle (nozzle, heat shield, electrode,
etc.) with power switch on.
WARNING
arc raYs can burn eyes and skin;
NoIsE can damage hearing.
• Wear welding helmet with No. 6 or 7 lens
shade.
• Wear eye, ear, and body protection.
CAUTION
position the powercut 875 at least 10 feet (3
meters) from the cutting area. sparks and hot
slag from the cutting operation can damage
the unit.

4.1 opEratIoN

4.2 powercut 875 coNtrols (fIgurE 4-1)
a. power switch (located on rear panel). When placed in ON po-
sition, the white pilot light will glow indicating control circuit is
energized and the cooling fan will run.
B. output current control. Adjustable from 20 to 60 amperes.
c. air test switch / air regulator. When placed in Test position, air
filter-regulator can be adjusted to desired pressure 4.5 - 5.2 bar
(65-75 psig) before cutting operations. Allow air to flow for a few
minutes. This should remove any condensation that may have
accumulated during shutdown period. Be sure to place switch
in OPERATE position before starting cutting operations.
D. trigger lock switch. When placed in LOCK position, this permits
releasing torch switch button after cutting arc has been initiated.
To extinguish arc at end of cut, press and release torch switch but-
ton again or pull torch away from work. When placed in UNLOCK
position, torch switch must be held closed by the operator during
the entire cutting operation and then released at the end of cut.
E. fault light. Will glow amber under the following conditions and
operations will come to a complete stop.
flow fault: The fault light will be on but will blink off for about
1/10th of a second every second. This indicates that the air flow
supply is low or has no back pressure.
over temperature: The fault light will be off but will blink on for
about 1/10th of a second every second. This indicates that the
duty cycle has been exceeded. Allow the power source to cool
down before returning to operate.
high/low line Voltage: The fault light will rapidly blink on and
off (five times per second). This indicates that the input voltage is
outside the "+ or -" 15% range of the input rating.
over-current: The fault light will be on continuously. This indi-
cates that input current has been exceeded.
all fault signals will remain on for a minimum of 10 seconds. If
fault clears, all will reset automatically except for over-current.
to clear over-current, the power must be shut off for 5 seconds
and then turned back on.
f. air pressure gauge: Recommended air pressure should be set
to 4.8 bar (70 psi).
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opEratIoN