Owner manual

ULTRA-CUT 100 XT
Manual0-5272 APPENDIX A-63
Troubleshooting:
1. IfthefaultisL239applyingSTARTwillclearthefaultunlessitbecomesactiveagain.Anoccasionalprob-
lemmaybeduetoincomingvoltageswells(voltageincreaseslastingfrom½cycletoasmuchasaminute).
Usually, if the plasma is at fault the problem will be present all the time.
2. ItisunlikelythatanopenconnectionontheJ61jumperwouldresultina239fault,morelikelytobeaVolt-
ageMismatchfault.However,ifit’sintermittentatexactlytherighttime,perhapsnotfullypluggedin,it
couldpossiblyshowupas239.CheckJ61.
3. IftheincomingvoltageisOKandtheproblempersistsitmaybetheSystemBiasboard,theCCMorthe
connectionbetweenJ62andJ27.
a. IftheincomingvoltageisOKandD4isonorsignal“ACVHIGHb”onJ62-6is“high”(about24VDC,
relativetoTP1orJ62-8)theSystemBiasboardisdefective.
b. IfD4isnotonandthesignal“ACVHIGHb”onJ62-6is“low”(about10-14VDC,relativetoTP1orJ62-
8)thenSystemBiasisOKandproblemisintheCCM.
c. IfJ62-6isnearzerovoltstheremaybebadconnectionbetweenJ62-6andJ27-6orJ62-7andJ27-6.
240 AC Voltage Low
Refertotherstparagraphforcode239forexplanationofwhatshouldhappenwhentheinputvoltageiscorrect.
VoltageLow--IftheSystemBiasboarddeterminesACvoltageistoolowitlightsaredLED,D14,ACVLOW,
andsetsthesignal“ACVLOWb”onJ62-10toa“high”,about24VDC(normalfora“low”hereis10-14VDC).
PowerisnotremovedfromT1aslowvoltagewon’tdamageanything,However,ifit’stoolowfortoolong,
somethingslikecontactors,ACsolenoids,thegascontrolsorTSC3000maystopworking.Alowvoltage,ifit’s
low enough, may also light D3, the red Missing Phase LED. This does not indicate the phase is actually missing.
ThevoltagethattriggersanACVoltageLowfaultis380Vfora480VACnominalline;300Vfora380,400or
415VACnominalline;175Vfora208or230VACline.
Possible cause:
• Incomingvoltageisnow,orwaspreviously,toolow.
o Power distribution wires or power cord too small for the load.
o Loose or high resistance connection somewhere in the power distribution or power cord connection.
• BadconnectionatJ62ontheSystemBiasboardorJ27ontheCCM.
• BadconnectionatJ61jumperontheSystemBiasboard.
• SystemBiasboarddefective.
• CCMdefective.
Troubleshooting:
1. IfthefaultisL240,applyingSTARTwillclearthefaultunlessitbecomesactiveagain.Anoccasionalproblem
maybeduetoincomingvoltagedipsorsags(voltagedropslastingfrom½cycletoasmuchasaminute).
Usually,iftheplasmaisatfault,theproblemwillbepresentallthetime.Afterrulingouteverythingelse
wemayhavetoattachamonitortothepowerinputtodetermineifthisistheproblem.
2. VoltagecanbeOKwhennotcuttingorcuttingatlowercurrentsbutathighercurrenttoomuchvoltagemay
be lost due to undersize power cord or distribution wires.
a. Measurethevoltagewhilecuttingathighercurrenttodetermineifthedropisexcessive.
b. Verify all power connections are clean and secure.
c. Verify correct wires size for the current draw per the recommendations in our manual as well as the local
electrical codes.
3. ItisunlikelythatanopenconnectionontheJ61jumperwouldresultina240fault,itismorelikelytocause
aVoltageMismatchfault.However,ifit’sintermittentatexactlytherighttime,perhapsnotfullyplugged
in,itpossiblycouldshowupas240.CheckthejumperatJ61.