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1. Disconnect input AC power supply lines to the
machine before performing periodic maintenance,
tightening, cleaning, or replacing parts.
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1. Check that no combustible materials are in the
welding or cutting area or around the machine.
2. Remove any debris, dust, dirt, or materials that
could block the air flow to the machine for cooling.
3. Inspect the electrode cables for any slits or
punctures in the cable jacket, or any condition that
would affect the proper operation of the machine.
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Clean the inside of the machine with low pressure air
stream. Clean the following parts.
• Main transformer and choke.
• Electrode and work cable connections.
• SCR rectifier bridge and heat sink fins.
• Control board.
• Firing board.
• Fan Assembly.
!"' The fan motor has sealed bearings which
require no maintenance.
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