Maintenance, Input filter capacitor discharge procedure, Warning – Lincoln Electric INVERTEC SVM101-B User Manual
Page 20
V300-I
MAINTENANCE
D-2
D-2
5. Locate the two capacitor terminals (large hex
head capscrews)shown in Figure D.1.
6. Use electrically insulated gloves and insulated pli-
ers. Hold body of the resistor and connect resistor
leads across the two capacitor terminals. Hold
resistor in place for 10 seconds. DO NOT TOUCH
CAPACITOR TERMINALS WITH YOUR BARE
HANDS.
7. Repeat discharge procedure for capacitor on
other side of machine. If you are working on a
575 VAC machine, repeat discharge procedure
for second capacitor on each side of machine.
8. Check voltage across terminals of all capacitors
with a DC voltmeter. Polarity of capacitor termi-
nals is marked on PC board above terminals.
Voltage should be zero. If any voltage remains,
repeat this capacitor discharge procedure.
INPUT FILTER CAPACITOR
DISCHARGE PROCEDURE
1. Turn off input power or disconnect input power
lines.
2. Remove 14 5/16” hex head screws from side and
top of machine (6 screws on each side and 2
screws on top) and remove wrap-around machine
cover.
3. Be careful not to make contact with the capacitor
terminals that are located in the center of the
Switch Boards.
4. Obtain a high resistance and high wattage resis-
tor (25-1000 ohms and 25 watts minimum). This
resistor is not supplied with machine. NEVER
USE A SHORTING STRAP FOR THIS PROCE-
DURE. .
FIGURE D.1 — LOCATION OF INPUT FILTER CAPACITOR TERMINALS.
Failure to follow this capacitor
discharge procedure can result
in electric shock.
WARNING