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s§5 Maintenance & Troubleshooting
§5.1 Maintenance
In order to guarantee that arc welding machine works high-efficiently and in safety, it must be
maintained regularly. Let customers understand the maintenance methods and means of arc
welding machine more , enable customers to carry on simple examination and safeguarding by
oneself, try one's best to reduce the fault rate and repair times of arc welding machine, so as 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 supply
power and wait for 5 minutes, until capacity voltage already drop to safe voltage 36V.
Frequency
Maintenance items
Daily
examination
If the power switch does not correctly snap in position, please replace
immediately. Contact service department for replacement switch.
After power ON, watch/listen to confirm arc welding machine cooling fan
is on and there is vibration or peculiar smell. If there is one of the above
problems, disconnect power cord and remove cover to determine blockage
and remove.
Observe LED display lamp and confirm POWER lamp is continuously
illuminated. If this lamp id flickering, LINE voltage is too high or low.
Observe that both voltage “V” and wire speed “S” knobs are functional and
turn easily. If not, replace potentiometers.
Confirm all welding cables are not damaged and all terminal connections
are secure. Loose connectors will quickly over heat cables and terminals
causing permanent damage.
Observe shield gas hose and fittings are in good condition and securely
fastened to regulator and machine. Cylinder control valve should be turned
OFF when machine is not in use to insure there is no loss of shield gas.
Monthly
examination
Using dry compressed air, clear the inside of arc welding machine of dust
and contamination on main voltage transformer, inductor coil, IGBT module
& diode aluminum finned heat sinks as well as across the surface of the PCB.
Check the terminal lugs in arc welding machine, if loose, please secure. If
burnt, please replace. If rusty, remove oxidation on bolt with emery cloth or
steel wool to ensure good electrical contact.
Quarter-
yearly
examination
All welding wires, cables and connections must be in good condition and
attached securely. Machine cooling fan must be operable and no excessive
dirt or dust should be built-up on internal components.
