ESAB Plasmarc EPP-450 User Manual

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SECTION 6 TROUBLESHOOTING
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.
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LED3–(yellow)BusRippleFault-Momentarilyilluminatesatthebeginningof
eachcut.Continuouslylitduringsingle-phasingorimbalancedline-to-linevolt-
agesofthethreephaseinputline(ExcessiveRipple).PowerSourceisshutdown.
LED4–(yellow)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–(yellow)LowBusFault–Illuminateswheninputline
voltageislowerthan10%belownominallinevoltagerating.
PowerSourceisshutdown.
LED7–(yellow)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–(yellow)ArcVoltageCutoFault–Illuminateswhen
arcvoltageincreasesoverthepresetvalue.PSisshutdown.

ESAB Plasmarc EPP-450 Specifications

General

Brand	ESAB
Model	Plasmarc EPP-450
Category	Welding System
Language	English