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§6 Maintenance & Troubleshooting
§6.1 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 drop to safe voltage 36V!
Date
Maintenance items
Daily
examinati
on
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 the reason, please contact your local
service repair station or distributor/Agent.
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, please clear the problem. If the fan does not rotate after getting rid of
the above problems, you can poke the blade by the rotation direction of fan. If the
fan rotates normally, the start capacity should be replaced. If not, change the fan.
Observe whether the fast connector is loose or overheated. If the arc-welding
machine has the above problems, it should be fastened or changed.
Observe whether the current output cable is damaged. If it is damaged, it should
be insulated or changed.
Monthly
examinati
on
Using the dry compressed air to clear the inside of arc welding machine.
Especially for clearing up the dusts on radiator, main voltage transformer,
inductors, IGBT modules, fast recover diodes, PCB’s, etc.
Check the screws and bolts in the machine. If any is loose, please screw it
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