Part No. 729-110-040 Rev. 1.41 | June 2016
© 2016 Nelson Stud Welding, Inc. All Rights Reserved.
44
6.2
Diagnostic Error Codes
* Fatal, meaning you have to power down to continue welding
** Acknowledge, meaning the error will exist as long as the unit is powered on. (Note, welding can continue
while the error exists)
Error Display
Description
Fatal*
Welding Can
Continue**
E - - -: No Errors
No errors.
NA
NA
E001 Shorted
Control Cable
–
Fix Control Cable
and/or Gun
The gun drive circuit sensed a current spike of 10A or greater for at least
10us. When this condition is sensed, the gun drive turns off and the user
interface displays this error. The gun may be retriggered and the unit
does not need to be powered down.
No
No
Problems (Most Likely to Least Likely)
A cable short in the combo cable external to the unit.
A wiring or switch short in the gun.
Internal wiring from the control to the output board, output board to the front panel gun connector.
Reconfigure wiring as needed.
Failure of the control board. Replace control board.
E004 Regulation
Error
– Arc Went
Out
If the control board senses that the current was more than 50% low
while the control to the power system was at the maximum for 15ms, it
will abort the weld and display this error. This will happen if the current
sensing failing for any reason (wiring, power supply, etc). This exists as
a safety mechanism in case current sensing fails. This is most likely
caused by the arc actually popping out.
No
No
Problems (Most Likely to Least Likely)
Arc actually popped out. Check
gun lift and try again. If it’s consistent, it is an internal failure.
Pilot arc board failure. Sometimes will also indicate contact with workpiece incorrectly. Replace pilot arc
board.
Damaged/broken connection from the current sensor to JP5 of control board.
Pilot arc circuit. Look for evidence of pilot arc. If there is no pilot arc mark on the work material, replace
the pilot arc board.
Check main relay pulled in during start up process. When the main relay is closed, there should be 0V
between the two power terminals of the input board. If the voltage is higher, the input board main relay
in not energized. Replace the input board.
Low cable inductance. Increase cable inductance, using a longer ground cable (#1AWG, 25 (#722-000-
124) or 2/O AWG, 25 (#722-000-151) combo cables), to eliminate faulty welds.
Summary of Contents for ArcCharger N550C DOMESTIC
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