Tweco 400 Ultra-Cut(May 2014) - Manual (Page 206)

ULTRA-CUT 100 XT/200 XT/300 XT/400 XT
A-78 APPENDIX Manual 0-5302
271 Inverter ID Reading Fault
Refer to section for codes 225-230 for a description of the ID signals. If this code appears it means one of these ID signals
has gone false some time after power up.
Possible causes:
• An intermittent ribbon cable or one not fully latched in place.
• EMI interference.
Troubleshooting:
1. First recycle power to see if the fault is still there. It may now show up as one of the 225-230 codes which will indicate
which inverter.
2. Determine when the code shows up. If it is EMI it may not happen every time but if, when it happens, it is always at the
beginning of piloting, it may be EMI interference. Check the system ground cables and if an AC200XT check the torch
shield connection to the unit rear panel.
3. If it happens intermittently during cutting or idling it might be an intermittent ribbon cable. This code does not say which
inverter section so you have to check each ribbon cable for proper connection on each end. It’s highly unlikely for a rib-
bon cable to be intermittent but if you have more than 2 sections try disconnecting one section at a time and cut at lower
current. See if you find one that causes the problem and if so replace that ribbon cable.
Group 3 codes relate to the GAS Controls Status and Communication Protocol
Also refer to GCM 2010 Status Codes at the end of this Group 3 codes section.
301 Gas Control Communication Fault
No signal detected over the fiber-optic link from the gas control. In the case where there are additional devices other than
Gas Control connected to the CANBUS this code would indicate the Gas Control is having communication problems while
the other CANBUS devices are OK. We don’t currently have any other devices on the CANBUS so it is more likely that code
501 will be what is set. In any case troubleshooting is the same as for 501.
Possible cause:
• Most likely cause is dirty or defective fiber-optic cable or connector.
• Cable to GCM 2010, DMC or DPC not connected or broken.
• Defective control board or power supply in the Gas Control
• Defective CCM
Troubleshooting:
1. Check that the fiber-optic cable is fully plugged in to both sockets. Clean the cable ends with a soft cloth and blow out
the sockets with air.
2. Check gas control cables. If any of the gas control cables are not connected there will be no communication as there
will be no power to the control. This may show up as a 301 or 501 code. Also if the cable is broken or defective such
that the gas control is not enabled it may have power but in the case of the DMC or DPC its fault light will blink error 101
while the CCM will only detect that there is no communication and it will show 301 or possibly 501.
302 Gas Control Communications Reply Fault
Communication has been established but Gas Control did not reply to a request from the CCM in the time allowed. Likely
cause is Fiber-optic problems (see code 501) or if problem persists defective Gas Control main PCB.
303 Gas Pressure Fault
Gas pressure faults only show up when you try to start the torch, not during purging or setting flows .
With the Auto-Cut 200 XT and the Auto-Cut 300 XT (GCM 1000 XT), the gas pressure sensor is only on the plasma gas and
is in series with Run/Set switch. A 303 code here indicates either plasma gas missing or very low pressure, less than 50
PSI, or RUN/SET switch is in SET position.