Northern Industrial Welding
12
Operating Instructions and Parts Manual
ST80i
Trouble shooting Chart
No. Breakdown
Analysis
Solutions
Poor ventilation leads to
over-heat protection
Improve ventilation
Internal temperature is
too high
Will automatically recover
when the temperature
lowers.
1
Yellow
Indicator is
on
Using over the rated
duty-cycle
Will automatically recover
when the temperature
lowers.
2
The
adjustment
knob on
the front
panel didn’t
work
Potentiometer broken
(current regulation)
Replace the
potentiometer.
Switch broken
Replace the switch
Fan broken
Replace or repair the fan
3
Cooling
Fan not
working or
turning
very slowly
Wire broken or fallen off
Check connections
Over voltage, under
voltage
See No. 1
Welder getting
overheated
See No. 1
4
No no-load
voltage
Switch broken
Replace the switch
Summary of Contents for ST 80 i
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