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SAFETY PRECAUTIONS
ELECTRIC SHOCK can kill.
• Only qualified personnel
should perform this mainte-
nance.
• Turn the input power OFF at
the disconnect switch or fuse
box before working on this
equipment.
• Do not touch electrically hot parts.
ROUTINE AND PERIODIC
MAINTENANCE
Perform the following preventative maintenance at
least once every six months.
Perform the following daily:
1. Check that no combustible materials are around
the machine or in the welding or cutting area.
2. Remove any debris, dust, dirt, or materials that
could block cooling air flow to the machine.
3. Inspect the electrode cables for any slits or punc-
tures in the cable jacket. Also check for any other
condition that could affect the proper operation of
the machine.
Perform periodically:
1. In extremely dusty conditions, dirt may clog the
cooling air channels, causing the machine to run
hot. Blow out the machine at regular intervals with
low pressure air. Clean the following parts. See
Figure D.1.
• Main transformer and choke
• SCR/diode bridge
• Control PC board
• Starting PC board
• Electrode and work cable connections
• Fan assembly
NOTE: The fan motor has sealed bearings that require
no service.
• Remote control terminal strip TS1.
NOTE: Keeping remote control terminal strip TS1
clean is especially important in damp locations.
MAINTENANCE
D-2 D-2
LINCOLN
®
ELECTRIC
IDEALARC DC-400
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WARNING