Owner manual

ULTRA-CUT 100 XT
Manual0-5272 APPENDIX A-49
Arc starter without Spark Gap (Ultra-Cut)
1. CheckforpowertotheRAS1000XT’sIgnitionModuleduringthe15secondsfollowingpreow(ignition
phase).ArcstarterpowercomesthroughtherearpanelcircuitbreakerCB4,makesureitisn’ttripped.
a. During the ignition phase, measure for 120 VAC at the input terminals marked 120 VAC on the Ignition
module, a gray rectangular box with screw terminals on one side.
WARNING!
Do not let the meter probes (or your hands) come in contact with the other terminals marked Hb and Ho or the
other end of the wires connected to them. These can have 10,000 volt pulses which can cause physical harm and
will damage your meter.
2. If 120 VAC is not present go to step 3.
a. If 120 VAC is present and still no spark, the Ignition Module may be bad.
3. 120VACtotheremoteArcStartercomesfromJ59-7&9onthepowersupplyrearpanelandconnectsto
J58-7&9ontheRAS1000XT.RemovethecablefromJ59andduringtheignitionphasemeasurefor120
VAC between pins 7 & 9.
a. If120VACispresentproblemisinthecabletotheRAS1000XTortheJ58connectorandinternalhar-
ness in the Arc Starter.
b. If 120 VAC is present proceed to the next step.
4. 120VACtoJ59comesfromtherelayboardJ8-3withreturnonpin11.OntheRelayboard,RFONLED,
D23, should be on during the igniting phase. If it is not skip to the next step.
a. IfD23isonandthereisnot120VACatJ8-3&11thentheRelayboardisbad.
Either Arc Starter
5. /RASONsignalnoton.CCMsendsactivelowsignal“/RASON”overthe40pinribboncableonpin
16totheRelay&Interfaceboard.OntherelayboardRASControlrelay(K2)closes(RFONLED,D23on)
sending120VACtoJ8-3withreturnonJ8-11.FromhereiteithergoestotheHFtransformerT2(AC200XT)
ortoJ59asdescribedabove.
a. Measurethesignal“/RASON”onpin16ofthe40pinribboncablerelativetoTP1oneithertheCCM
I/OboardortheRelayboard.Ifitislow(lessthan1V)skiptostep6.Otherwisecontinuethisstep.
NOTE
If the CCM thinks there is already a pilot it would not enable the HF. Pilot board has a current sensor that sends
a di�erential analog pilot current level signal to the Relay board which in turn passes that signal to the CCM. On
the Relay board D11 LED “Pilot Current Detected” or just “PILOT” lights if it sees a signal from the pilot board.