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5 Maintenance & Troubleshooting
5.1 Maintenance
In order to guarantee that the arc welding machine works efficiently and in safety, it must be maintained regularly.
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, until
capacity voltage already drops to safe voltage 36V!
Frequency
Maintenance item
Daily
examination
Observe whether 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 ensure nil peculiar smells or noises are present. If
there is an issue such as this, please contact local this area agent or the branch company.
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 is any
difference and it has affected the normal welding craft, please adjust it.
Check whether fan is damaged and is normal to rotate or control. If the fan is damaged,
please change immediately. If the fan does not rotate after the arc welding machine is
overheated, observe whether there is something blocking the blade. If it’s blocked, please
remove. If the fan does not rotate after removing object the fan can be moved in the
direction of the fan’s normal direction. If the fan rotates normally, the start capacity should
be replaced; If not, replace 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 that Whether the current output cable is damaged. If it is damaged, it should be
wrapped up, insulated or changed.
Monthly
examination
Using dry compressed air to clear the inside of arc welding machine. Especially for clearing
up the dusts on radiator, main voltage transformer, inductance, IGBT module, the fast
recover diode and PCB, etc.
Ensure all connections are tight. If loose please tighten. Please erase rust on connections to
ensure good connectivity and performance.
Quarter-
yearly
examination
Check whether the actual current accords with the displaying value. If they do not accord,
they should be recalibrated. The actual current value can be measured by the adjusted
plier-type ampere meter.
Yearly
examination Measure the insulating impedance among the main circuit, PCB and case, if it belo
w 1MΩ
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