Operating Instructions DC-xx13 and M31xx
961-00060 rev9 24/25
Check / Symptom
Reasons
Remedy
No RS232 communication
Problems generally occur with
incorrect wiring or incompatible
software
Check connections, particularly Tx & Rx
Machine continually exceeds
upper or lower limits
Often caused by variations in
electrode, particularly when new
Run several trial welds and check
electrode alignment.
Operate machine in constant current
mode in order to rule out voltage
feedback problems.
Locate cause of voltage feedback
problem
Machine starts, but displays
UNABLE TO ESTABLISH
COMMS
This occurs if the incompatible
software is fitted
Fit correct software
Machine will not trigger
Most often caused by loss of
+24VDC
Alternatively, suspect wiring
Check fuse and wiring
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