ESAB ESP-400C Manual De Instrucciones página 308

section 6
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Fault Indicator (Front Panel)
Illuminates when there are abnormalities in the cutting process or when the input
voltage falls ±10% outside the normal value. Momentary illumination is normal. If
continuously lit, check LEDs 3, 4, 5, 7, and 8 on PCB1 for further diagnosis.
LED 3 – (amber) Bus Ripple Fault - Momentarily illuminates at the beginning
of each cut. Continuously lit during single-phasing or imbalanced line-to-line
voltages of the three phase input line (Excessive Ripple). Power Source is shut
down.
LED 4 – (amber) High Bus Fault – Illuminates when input line voltage is too high
for proper operation (approximately 20% above nominal line voltage rating).
Power source is shut down.
LED 5 – (amber) Low Bus Fault – Illuminates when input line
voltage is approximately 20% below nominal line voltage
rating. Power Source is shut down.
LED 7 – (amber) Arc Voltage Saturation Fault – Illuminates
when the cutting arc voltage is too high and cutting current
drops below preset level. LED will extinguish after voltage
decreases and current rises.
LED 8 – (amber) Arc V oltage Cutoff Fault – Illuminates when arc
voltage increases over the preset value. PS is shut down.
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