Thermal Dynamics ULTRA-CUT 200 XT, Operating Manual

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ULTRA-CUT 200 XT
A-80 APPENDIX Manual 0-5304
This test measures the “dead head” or blocked flow pressure at the rear panel coolant supply fitting. 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 fitting.
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 fitting.
NOTE!
Do not put the gauge in-line and attempt to pinch off the hose to block the flow. It is very dif-
ficult to totally block the flow and failure to do so will result in incorrect setting 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 flow 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 flow test:
In addition to the pressure test or in place of it if you don’t have a gauge, determine if the flow returning from
the torch (the flow 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 flow is greater and it overflows.
If the flow is lower than 0.75 GPM (0.25 GPM for PAK200i):
• 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).
Coolant flow is correct but system doesn’t detect it due to defective components:
• Defective or disconnected FS1 flow switch.
• Relay board.
• CCM.
Flow Switch FS1 disconnected – FS1 comes with wire about 1 ft. long and a connector that connects to a 3 wire
harness. This could be disconnected at either end, J74 or J5 on the relay board.
Defective FS1– The flow switch, normally open, closes when flow through it exceeds 0.75 GPM, could be open.
Easiest place to measure the switch is at the J5 harness connector that plugs into the Pilot board. Assuming you
have previously determined flow is sufficient, disconnect J5 from the Pilot board, start the unit so the coolant
is flowing and measure continuity between the 2 pins of J5.
• If there is no continuity either the switch is open or the harness between J5 and J74 at FS1 is open.
• If there is continuity between the J5 pins with sufficient coolant flow then either relay board or the CCM
is faulty.
405 Low Coolant Level Warning
If the coolant level becomes low while cutting it is not necessary to immediately stop the cut as there is still
enough coolant to continue so we display E405 as a warning. Once the cut stops if the coolant is still low the
display changes to E401 and prevents starting another cut. Refer to the section for code 401 for troubleshooting.