ESAB Aristo RoboFeed 30-4, Service Manual

Page: 17 / 34

DESCRIPTION OF OPERATION
0740 800 169
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© ESAB AB 2014
Communication interruptions
The U8 displays fault codes 12 and/or 14 if communication between the panel and the wire
feed unit or power source fails. Check the following points in the event of problems with CAN
communication:
• That a terminating resistor is fitted.
• The control cable:
○
Check that the correct type of cable is being used, i.e. the same as that between the
power source and the wire feed unit when the equipment was delivered.
○ Check that the cores are correctly connected. CAN H and CAN L must be carried by
the twinned pair.
• Check that all screen connections are sound.
• RoboFeed: Check that there is good contact at the connections to capacitor 13C3, see
the relevant wiring diagram in Section
“WIRING DIAGRAM” , page 5 .
• Power source: Check that there is good contact with the chassis connection to the
control circuit board, the interference suppression board and the interference
suppression capacitors.
• Check the power supply voltages on circuit board 13AP1.
• If there are no faults in any of the above, replace circuit board 13AP1.
13AP1:8 I/O
Terminal BA is the interface connection to the I/O board, see Section “13AP2 I/O board” ,
page 20.
13AP1:9 Arc voltage sensing
In order to avoid spurious volt drops when measuring the welding arc voltage, the power
source senses the arc voltage via the filler wire and the feeder unit motor. Socket 13XS1 and
wire 1320 are intended for connection to a second feed unit when double wire feeders are
used.