Section 3 Operation; Controls - ESAB ESP-50 Manuel D'instruction

SECTIoN 4
WarNING
ElECTrIC SHoCK can kill.
• Do NOT operate the unit with the
cover removed.
• Do NOT apply power to the unit
while holding or carrying the
unit.
• Do NOT t ouch any torch parts f or-
ward 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 protec-
tion.
CauTIoN
Position the ESP-50 at least 10
feet (3 meters) from the cutting
area. Sparks and hot slag from
the cutting operation can damage
the unit.
4.1 ESP-50 CoNTrolS (fIGurE 4-1)
a. Power Switch (located on rear panel). When placed in ON position, 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 50 amperes.
C. air Test Switch. When placed in Test position, air filter-regulator can be adjusted
to desired pressure (60 - 75 psig / 4.1 - 5.2 bars) before cutting operations. Al-
low 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. Pilot arc Select Switch.
Hi: Set pilot arc current level to "High" when improved stability is needed. May
lessen consumable life.
Low: Maintains "Low" pilot arc current level. May improve consumable life.
Auto: Adjusts pilot arc based on output current selected. Use for standard
cutting.
E. fault light. Will glow amber under the following conditions and opera-
tions will come to a complete stop.
Start Signal: On power-up, fault light will be on continuously when a start
signal is present. Remove start signal to reset.
Parts in Place fault: The fault light will be on continuously at power-up. This
indicates missing or worn consumables. Turn power off and inspect torch.
over Temperature: The fault light will be mostly off but will flick 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 continuing 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 indicates 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.
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oPEraTIoN