F-1 MAINTANCE AND TROUBLESHOOTING F-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 disconnect 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 operation of the panel knob’s and switch’s on the front and at the back of arc
welding machine are operational and operate correctly.
If the switch is not operational, 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, change immediately. If the fan
does not rotate after the arc welding machine is overheated, check if something blocking
the fan blade, if it is blocked, remove the 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, change 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.
Using dry compressed air to clear the inside of arc welding machine. Especially remove
dust from heat sinks, main voltage transformer, inductance, IGBT module, the fast
recover diode and PCB, etc.
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