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4. Maintenance & Troubleshooting
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4.1. 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 ítems
Daily
examination
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.
