D-1 MAINTENANCE AND TROUBLESHOOTING D-1
MAINTENANCE
In order to guarantee the arc welding machine works efficiently and safely, it must be maintained regularly.
Refer to the maintenance items in the following table.
● Warning: For safety while maintaining the machine, please shut off the supply power and wait
for 5 minutes, until capacitor voltage drops to safe voltage.
All service work should be conducted by an authorised Lincoln Electric field service agent
Check for correct operation of the control knobs and switches on the front and rear of
power source .
If the switch is not operational, please replace immediately.
Check the function of the LED display. If it doesn’t work, maintain or replace the
display PCB.
Check fan is operating normally. If the fan is damaged, replace immediately. If the fan
does not rotate after the arc welding machine is overheated, check if something is
blocking the fan blade, if it is blocked, remove obstruction. If the fan still does not rotate
try to spin the blade in the rotation direction of fan. If the fan rotates normally, the start
capacitor should be replaced; If not, replace the fan.
Check the output terminals for overheating, if so change output terminals. Ensure
welding lead plugs are connected tightly.
Check welding leads for damage. If damaged replace leads.
Use dry compressed air to clear the inside of arc welding machine. Especially for
removing dust from heat sinks, main voltage transformer, inductance, IGBT module,
the fast recover diode and PCB, etc.
Have a Lincoln Field service shop perform insulation resistance and earth continuity
tests.
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