Lincoln Electric INVERTEC POWER WAVE 450 IM524-D - Manual (Page 37)

5. Locate two sets of two resistors on the left side of
the machine and three sets of two resistors on the
right side of the machine. See Figure D.1. Do not
touch the resistors or any other internal machine
component. Using a DC voltmeter, check for any
DC voltage that may be present across the termi-
nals of each resistor and from each resistor to
case ground (20 measurements in all). If a voltage
is present, be careful not to touch these resistors.
ELECTRIC SHOCK can kill.
• Proceed with caution being care-
ful not to touch any internal
machine components during the
discharge procedure.
MAINTENANCE
D-2 D-2
POWER WAVE 450
5 PAIRS OF RESISTORS
CHECK VOLTAGES BETWEEN EACH
TERMINAL AND FROM EACH RESISTOR
TO CASE GROUND
FIGURE D.1 – RESISTOR LOCATIONS
WARNING