Matco Tools MM200 LCD Operator's Manual page 20

Date
Observe that 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 turn-on power, watch/listen to that whether the arc welding
machine has shaking, whistle calling or peculiar smell. If there is one of
the above problems, find out the reason to get rid of; if you can't find
out the reason, Please contact local this area agent or the branch
company.
Observe that 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.
Daily
Observe that whether the min/max value on LED accords with the
examination
set value. If there is any difference and it has affected the normal
welding craft, please adjust it.
Check up that 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
that whether there is something blocked in the blade, if it is blocked,
please get rid of ; 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 that 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.
Using the 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
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PCB, etc.
examination
Check up the bolt in arc welding machine, if it is loose, please screw
down it. If it is skid, please replace. If it is rusty, please erase rust on
bolt to ensure it works well.
Quarter-
Whether the actual current accords with the displaying value. If they
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did not accord, they should be regulated. The actual current value can
examination
be measured by the adjusted plier-type ampere meter.
Measure the insulating impedance among the main circuit, PCB and
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case, if it below 1MΩ, insulation is thought to be damaged and need to
examination
change and need to change or strengthen insulation.
MAINTENANCE AND TROUBLESHOOTING
- Ⅳ -
Maintenance items