Lincoln Electric IM746 POWER WAVE 405 - Manual (Page 28)

D-1 MAINTENANCE D-1
POWER WAVE 405
SAFETY PRECAUTIONS
CAPACITOR DISCHARGE PROCEDURE
1. Obtain a power resistor (25 ohms, 25 watts).
2. Hold resistor body with electrically insulated glove.
DO NOT TOUCH TERMINALS. Connect the resis-
tor terminals across the two studs in the position
shown. Hold in each position for 1 second. Repeat
for all four capacitors.
3. Use a DC voltmeter to check that voltage is not
present across the terminals on all four capacitors.
ROUTINE MAINTENANCE
Routine maintenance consists of periodically blowing
out the machine, using a low pressure airstream, to
remove accumulated dust and dirt from the intake and
outlet louvers, and the cooling channels in the
machine.
CAPACITOR
TERMINALS
RESISTOR
PERIODIC MAINTENANCE
Calibration of the POWER WAVE 405 is critical to its
operation. Generally speaking the calibration will not
need adjustment. However, neglected or improperly
calibrated machines may not yield satisfactory weld
performance. To ensure optimal performance, the cal-
ibration of output Voltage and Current should be
checked yearly.
CALIBRATION SPECIFICATION
Output Voltage and Current are calibrated at the fac-
tory. Generally speaking the machine calibration will
not need adjustment. However, if the weld perfor-
mance changes, or the yearly calibration check
reveals a problem, contact the Lincoln Electric
Company for the calibration software utility.
The calibration procedure itself requires the use of a
grid, and certified actual meters for voltage and cur-
rent. The accuracy of the calibration will be directly
affected by the accuracy of the measuring equipment
you use. Detailed instructions are available with the
utility.
ELECTRIC SHOCK can kill.
• Do not touch electrically live parts or
electrode with skin or wet clothing.
• Insulate yourself from work and
ground
• Always wear dry insulating gloves.
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EXPLODING PARTS can cause
injury.
• Failed parts can explode or cause other
parts to explode when power is applied.
• Always wear a face shield and long
sleeves when servicing.
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See additional warning information
throughout this Operator’s Manual
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WARNING