Tweco 400 XT Ultra-Cut Plasma Cutting System With Automated Gas Control - Manual (Page 200)

ULTRA-CUT 400 XT
A-76 APPENDIX Manual 0-5306
Transmitter / Receiver Tests. The transmitter/receiver pair on the PCB and the fiber cable looks like this:
Art # 12314
Test the fiber:
Note that the fiber goes from black on one end to blue on the other. Shine a bright light into one end and you should be able
to see light from the other end. This tells you the light is getting through but doesn’t prove it is strong enough.
The CCM is the communication master. It transmits then expects a reply from the Gas Control Module (GCM). The GCM
does not transmit on its own, only in response to a request from the CCM.
The black end of the fiber cable is inserted into the transmitter which is the gray housing on the PCB. The other end of the
transmitting fiber is blue and goes into the receiver with the black housing.
A few seconds after power is turned on and when the pump has started up the CCM will try to transmit continuously for a
while. You can unplug the fiber from the CCM and should see the transmitter red LED on the CCM PCB blinking. It may stop
after a while so recycle power before deciding it isn’t working. If no light, check one of the other transmitter/receiver pairs.
If none of them blink the problem is in the CCM.
If at least one transmitter blinks plug the fiber back into that one then at the Gas Control end of the fiber (unplugged) you
should see the red light coming out of the blue end.
The Gas Control transmitter does not transmit except in response to a request from the CCM so you will not see any light
from the GCM transmitter with the cable unplugged. However, if you turn the connector 90 deg and insert the blue end into
the receiver (black housing), leaving transmitter open, then the GCM should receive the requests from the CCM and should
blink it’s transmitter (gray housing) in response. If not, problem is likely on the GCM board assuming it has power.
It is still possible even though you see the red light coming out the GCM end of the fiber that dirt in the transmitter or receiver
or on the fiber ends or the fiber is damaged so the light even though visible is not strong enough for the GCM board. If all
else fails replace the fiber cable and both CCM and GCM PCB.
502 CANBUS off due to excessive errors.
See 501 code for troubleshooting CANBUS faults.
503 CANBUS Data Error Warning.
This is a warning, does not shut the system down but is an indication that it probably will shut down soon (502 code).
Troubleshooting is same as for 501.
504 Reserved for future use.
Should not get this but if it happens may be due to EMI. Contact customer service.
Group 6 codes relate to the CCM and program updates. One exception is 619 which is a coolant flow
switch FS1 fault.
601-611 Various CCM CPU board internal faults.
For most of these faults try recycling the power but if the problem returns only thing to do is replace the CCM. Exceptions are:
1. 603 This is one of the reserved codes from the earlier product. Not used so it should never appear, if it does contact
customer service.
2. 607 Processor over temperature could occur if the ambient in the area of the CCM is too high. Try opening the upper
right side panel, perhaps blow some air to cool it off. If that doesn’t help or the ambient was not too hot to begin with,
replace the CCM.
3. 611 Code has various causes most of which require replacing the CCM. However, one possible cause is the programming
jumper on the CPU board (under the Static suppression PCB) has been left in the PROG position. This is a factory set-
ting used during initial programming and should never be found in the field. It is NOT used for application code updates
However, if someone did move it 611 will be the result.