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§7 Maintenance & Troubleshooting
§7.1 Maintenance
The operator must understand the maintenance procedure of inverter welding machine
and carry on simple examinations, cleanings and inspections. Do your best to protect the
machine from contamination environment and leaving unit ON when not in use to
lengthen service life of inverter arc welding machine. Inverter machines have transistors
that are cooled by aluminum heat sinks. When the power supply is ON, the cooling fan
brings dirt & dust into the machine covering the heat sinks and reducing cooling capacity
over time.
● Warning: For safety while maintaining the machine, please shut off the main
input power and wait for 5 minutes, until capacitors voltage drops to safe voltage
36V!
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 but it starts when blades are rotated in direction of fan, the start
capacity should be replaced.
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.
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