Owner manual

ULTRA-CUT 100 XT
A-74 APPENDIX Manual 0-5272
Art # 12313
MC3A
MC3B
M1
Torch Coolant Pump
1
2
3
J16
1 2 3 4
J13
(65B)
(66)
(67)
(64B)
CHASSIS GND
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
J8
1
5
3
2
4
Coolant Pump Control
K5
MC3
Coolant pump Control
(163)
(162)
SA4
ARC_SUPPRESSOR
D27
24 VAC
Relay PCB
TP1
TP3
CCM I/O PCB
To test Pump relay jump TP3 to TP1.
+24
J4-13
230 VAC from T1
Coolantowsbutowislessthantherequiredminimum:
Testandadjustthepump/bypassvalve:
Thistestmeasuresthe“deadhead”orblockedowpressureattherearpanelcoolantsupplytting.Perform
thistestonlyafterthecoolantsystemisfullyprimed,thatisafterthecoolantiscirculatedthroughoutthesystem
andismostlyfreeofbubbles.Itrequiresapressuregaugewith#6JICtting.
Thegaugeneedstobeabletoreadatleast173PSI.Removethecoolantsupplyhoseandconnectthepressure
gaugeinitsplace.FortheAuto-Cut200XTconnectthegaugeinplaceofthetorchcoolantsupplyhoseonthe
torchconnectionbulkhead.Thisisa#5JICtting.
NOTE:
Do not put the gauge in-line and aempt to pinch o the hose to block the ow. It is very dicult to totally block
the ow and failure to do so will result in incorrect seing of the bypass.
Turntheontheunit.Youwillhave4minutestoperformthetest/adjustmentbeforethesystemtimesoutwith
acoolantowfault.Ifthathappensrecyclingthepowergivesyouanother4minutes.
1. Thepressureonthegaugeshouldbecloseto173(170-175)PSI.IfitisthepumpandthebypassareOK.
2. Ifthepressureislessthan173PSIadjustthebypassscrewclockwisetoraisethepressure.Ifyoucan
changethepressurewiththebypassscrewbutcannotreach173PSIitislikelythepumpiswornoutor
damaged.Ifthepressuredoesnotchangeusingthebypassscrewitislikelythebypassisdefective.
3. Ifthepressureisabove173reducethepressurebyadjustingthebypassvalvescrewcounterclockwise.
Coolant ow test:
Inadditiontothepressuretestorinplaceofitifyoudon’thaveagauge,determineiftheowreturningfrom
thetorch(theowthatpassesthroughtheFS1),isgreaterthantherequiredminimum.Withtheunitswitched
offremovethereturnhosefromthebackofthepowersupply.Placeitinacontainerofaknownvolume.Turn
theunitonandletthepumprunexactly30seconds.Itshouldpumpatleast3/8gal.(1.4l).Usealargercon-
tainerincasetheowisgreateranditoverows.
Iftheowislowerthan0.75GPM:
• Lookforrestrictionssuchassharpbendsorsomethingpinchingthecoolanthosesortorchleads.
• Otherpossibilitiesarethebypassvalvehasbeenadjustedwrong(someonemayhaveturnedtheadjust-
mentscrew)seepressuretest/adjustmentabove
• Thepumpiswornout(maybethecasewithanolderunit).