SET-UP, OPERATION & TROUBLSHOOTING
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5 Maintenance & Troubleshooting
5.1 Maintenance
In order to guarantee that arc welding machine works high-efficiently and in safety, it must
be maintained regularly so as to lengthen service life of arc welding machine. Maintenance
items in detail are in the following table.
● Warning: For safety while maintaining the machine, please shut off the supply power
and wait for 5 minutes or until capacitor voltage drops to safe level below 36V!
date
Maintenance item
Daily exam
Observe whether the panel knob and switch in the front and at the back of arc
welding machine are flexible and put correctly in place. If the knob has not been put
correctly in place, please correct; If you can't correct or fix the knob , please replace
immediately;
If the switch is not flexible or it can't be put correctly in place, please replace
immediately; Please get in touch with maintenance service department if there are
no accessories.
After turning-on power, watch/listen to see whether the arc welding machine is
shaking, whistling or has a peculiar smell. If one of the above problems exists, find
out the reason and correct it. If you can't find out the reason, please contact your
dealer or the factory.
Observe whether the display value of LED is intact. If the display number is not
intact, please replace the damaged LED. If it still doesn’t work, please maintain or
replace the display PCB.
Observe whether the min/max value on LED accords with the set value. If there
are any differences and it is affecting the normal welding craft, please adjust it.
Check that the cooling fan is not damaged and is in normal and working condition.
If the fan is damaged, please change immediately. If the fan does not rotate, look to
see if there is something blocked in the blade. If it is blocked, remove it cautiously. If
the fan does not rotate after fixing the above problems but starts when blade is
pushed in the direction of fan, the start capacitor should be replaced. If not, replace
the fan.
Check if torch power and/or ground cable connectors are loose or show signs of
overheating. If this is observed, they should be fastened or changed.
Check whether the current output cable is damaged. If it is damaged, it should be
