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Trouble
Uneven weld
appearance
Distortion − movement
of base metal during
welding
Electrode welds with
different or unusual arc
characteristic
Maintenance
In order to guarantee safe and proper operation of welding machines, they must be maintained regularly. Let customers
understand the maintenance procedure of welding machines. Enable customers to carry on simple examination and
inspections. Do your best to reduce the fault rate and repair times of welding machines 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 main input power and wait for 5 minutes, until
capacitors voltage already drops to safe voltage 36V!
Date
Observe that the knobs and switches in the front and at the back of arc welding machine are flexible
and put correctly in place. If any knob has not been put correctly in place, please correct. If you
can't correct or fix the knob, please replace immediately;
If any 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 turn-on power, watch/listen if the arc-welding machine has shaking, whistle calling or peculiar
smell. If there is one of the above problems, find out the reason and clear it. If you can't find out
Daily
the reason, please contact your local service repair station or distributor/Agent.
examination
Observe that 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 that the min./max.Values on LED agree with the set value. If there is any difference and
it has affected the normal welding results, please adjust it.
Check whether the fan is damaged and whether it is normal to rotate or control. If the fan is
damaged, please change immediately. If the fan does not rotate after the machine is overheated,
observe if there is something blocking the blade. If it is blocked,
KEEP WORKiNG
KEEP WORKiNG
Keep Working
Possible Reason
Unsteady hand, wavering hand
Excessive heat input
Poor welding technique
Poor joint preparation and or joint
design
Incorrect polarity
Use two hands where possible to steady up,
practice your technique
Reduce the amperage or use a smaller electrode
Use the correct welding technique or seek
assistance for the correct technique
Check the joint design and fit up, make sure the
material is not too thick. Seek assistance for the
correct joint design and fit up
Change the polarity, check the electrode
manufacturer for correct polarity
Maintenance items
23
S i
6 1 6 0
Suggested Remedy
m D v
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