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MAINTENANCE | ||
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SAFETY PRECAUTIONS
WARNING
•Have a qualified electrician do the maintenance and troubleshooting work.
•Disconnect the input power off using the dis- connect switch at the main input supply before working inside machine.
•Unplug the power cable if it is connected to a receptacle.
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Read the Safety Precautions in the front of this manu- al before working on this machine.
ROUTINE AND PERIODIC
MAINTENANCE
1.Disconnect input AC power supply lines to the machine before performing periodic maintenance, tightening, cleaning, or replacing parts. See Figure D.1.
Perform the following daily:
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.
3.Inspect the electrode cables for any slits, punc- tures in the cable jacket, or any condition that would affect the proper operation of the machine.
Perform Periodically:
Clean the inside of the machine with low pressure air stream. Clean the following parts. Refer to Figure D.1.
Main transformer and choke.
Electrode and work cable connections.
SCR rectifier bridge and heat sink fins.
Fan Motor Assembly.
Control Printed Circuit Board.
NOTE: The fan motor has sealed bearings which require no maintenance.