Owner manual

ULTRA-CUT 100 XT
A-56 APPENDIX Manual 0-5272
202-204 Not used. Reserved codes from the earlier product.
205 DC Output Low
DCoutput(voltage)lowmeansoneormoreinvertersectionsareenabledbuttheoutputvoltageisbelowa
presetvoltage.ShortlyafterreceivingtheStartsignalfromtheCNC,butbeforetheendofpreow,bothsec-
tionsofIM#1areenabledandCCMmeasuresthepowersupplyoutputvoltagebetweennegative(Torch)to
positive(Work)attheoutputterminals.Ifthisislessthanasetvalueduringpreoworifatanytimeduring
pilotingorcuttingitdropstobelowthatvalueforashorttime,theinvertersareshutoffandcode205isset.
205willalmostalwaysbeindicatedasan“L”,notan“E”faultbecauseassoonasit’sdetectedtheinverters
areshutoffandsonolongerhavethefaultoflowoutputvoltage.Currentlythelowvoltagevalueis-60VDC.
Causes of 205 code can include shorts outside the plasma power supply, shorts inside the plasma power supply
and measurement errors.
a. Short external to the plasma power supply:
• ThenegativeleadgoesfromtherearofthepowersupplytotheremotearcstarterortotheGCM1000
XT in the case of the AC 3000 XT.
o Cable pinched in or exiting the power track
o Short inside the Arc Starter such as a wire coming loose and grounding to the chassis.
o Short inside the torch mounting tube.
• Troubleshootforexternalnegativeleadshortsbyremovingtheleadfromtherearofthepowersupply
andtrytostart.Itwon’tstartbutifyougetthesame205codetheproblemisinsidetheunit.
b. Short inside the supply:
• AlltheinvertersoutputsexceptthatofIM1Aareinparallel.Ifanyinverter’soutputisshorteditwill
appear as a short across the power supply output.
Troubleshootbyremovingall(oroneatatime)oftheinverteroutputconnectorsexceptthoseonIM1A.
ThenapplyStarttotheunit.Ifitstartsnowoneoftheotherinvertershadshortedoutput.Tond
thedefectiveonereconnectoneatatimeuntilthefaultreappears.
206 Not used. Reserved codes from the earlier product.
207 Unexpected Current in the Work Lead.
HCT1,aHallEffectcurrentsensoronthepositive(workbussbar)measurestheworkleadcurrent.Inverter
section1Aisenabledduringpreowtimebutthereshouldbenocurrentintheworkleadbeforethepilotis
ignited and before the arc is transferred to the work. If current greater than 8A is detected before or during
preowsomethingiswrong.
1. 207 code before START applied:
• Defectiveworkcurrentsensor,HCT1.
• DefectiveRelayPCB
• DefectiveCCM
DefectiveSensor
• Theworkcurrentsensor,HCT1,receivespower,+15VDCand-15VDCfromtheRelayPCB.Bothmust
bepresentforthesensortoworkproperly.MeasurebetweenRelayPCBTP1(orJ1-4)toJ1-1for+15VDC
andtoJ1-2for-15VDC.
• Ifeither+or–15VDCnotpresentremovetheJ1connectorandrepeatthemeasurementatJ1-1&2onthe
Relayboard.Ifthevoltageisnowpresentthesensorisdefectiveorshorted(theharnessmaybeshorted).
Ifvoltagesstillnotpresent,theRelayboardisdefective.