Owner manual

ULTRA-CUT 100 XT
A-62 APPENDIX Manual 0-5272
238 System Bias voltage identication is invalid.
AtpoweruptheSystemBiasboardmeasurestheinputvoltageandsendssignalstotheCCMindicatingwhich
rangeofvoltageithasdetected.Seesection231-236fordetails.Ifoneofthe3voltageranges,208-230V,380-
415Vor480Visn’tidentiedthenbothIDsignalsarehighresultinginaninvalidsignal.
Possible causes:
• Unitisconnectedtovoltagebelowthe208-230Vrangeorabovethe480Vrange.(unlikelyunlessthere
isaproblemwiththeincomingvoltage.)
• DefectiveSystemBiasboard
• BadconnectionbetweenSystemBiasoutputJ62andCCMinputJ27ontheI/Oboard.
• DefectiveCCM
Troubleshooting:
1. Measureall3phasesoftheinputvoltageandconrmtheyarewithinthetolerancespeciedintheunit
manual.
2. Refertosection231-236InverterVACMismatchandperformtroubleshootinginstep1.b.Ifthe2signals
don’tmatchtheincomingvoltage,ifbotharehigh,thentheSystemBiasisdefective.
3. Ifstep2wasOKmakethesamemeasurementatJ27ontheCCMI/OPCB.IfOKheretheCCMisdefective.
OtherwiseinspecttheconnectionsatJ62andJ27.
239 AC Voltage High
VoltageOK--AtpoweruptheSystemBiasboardmeasurestheinputvoltageanddeterminedifitiswithinthe
rangeofvoltagesetbytheJ16jumper.Seesection231-236InverterVACMismatchTroubleshootingstep1.a
fordetailsofthejumper.NormallywhentheinputvoltageisOKtheSystemBiasboardturnsonarelayK1
ontheleftdieoftheboardtoapplypowertotheT1Auxiliarytransformer.D44,agreen“TransformerON”
LED,willlightwhenK1isenergized.T1providespowertothegascontrolsandtheTSC3000aswellasthe
pumps and fans.
VoltageHigh--IftheACvoltageisdeterminedtobetoohighitlightsD4,ACVHIGH,aredLEDontheSystem
Biasboard,andsetsthesignal“ACVHIGHb”onJ62-6toa“high”about24VDC(normalfora“low”hereis
10-14VDC).Topreventthepossibilityofexcessivevoltageappliedtoseveralitems(gascontrols,pumps,fans
etc.)K1isopenedremovingpowerfromT1andD44goesoff.Ifit’smorethanamomentaryglitchthegas
controlsandtheTSC3000(ifused)willreset.Communicationwiththecuttingtablemaybeinterrupted.With
theDFC3000AutoGasControlandperhapsthecuttingtablecontrol,theprocesswillhavetobereloaded.
D4isonandthesignal“ACVHIGHb”ishighonlywhilethevoltageisactuallyhigh.Thesignal“ACVHIGH
b”doesnotlatchon.
IfthefaultisE239thatmeansitiscurrentlyactive,thatis,currentlydetectedasbeingtoohigh.Ifit’sL239that
meansthevoltagetoohighpreviouslybutitisnottoohighnow.ApplyingSTARTwillclearthefaultunless
itbecomesactiveagain.
ThevoltagethattriggersanACVoltageHighfaultisabove550Vfor480VACline;above470Vfora380,400or
415Vnominalline;above270Vfora208or230VACline.
Possible causes:
• Incomingvoltageisorwastoohigh.
• BadconnectionatJ62orJ27
• BadconnectionatJ61jumper
• SystemBiasboarddefective
• CCMdefective.