Lincoln Electric INVERTEC SVM161-A - Manual (Page 54)

ELECTRIC SHOCK can kill.
• Have an electrician install and ser-
vice this equipment.
• Turn the input power off at the fuse
box before working on equipment.
• Do not touch electrically hot parts.
• Prior to performing preventative maintenance,
perform the following capacitor discharge proce-
dure to avoid electric shock.
DISCHARGE PROCEDURE
1. Remove the input power to the machine.
2. Using the phillips head screwdriver remove the
screws securing the case wraparound cover.
3. Be careful not to make contact with the capac-
itor solder pads located at the top of the IGBT
power board.
4. Obtain a high resistance and high wattage
resistor (25-1000 ohms and 25 watts mini-
mum). This resistor is not with the machine.
NEVER USE A SHORTING STRAP FOR THIS
PROCEDURE.
5. Locate the eight capacitor solder pads shown
in Figure F.3.
6. Using electrically insulated gloves and pliers,
hold the body of the resistor with the pliers and
connect the resistor leads across the two
capacitor solder pads. Hold the resistor in
place for 10 seconds. DO NOT TOUCH
CAPACITOR SOLDER PADS WITH YOUR
BARE HANDS.
7. Repeat the discharge procedure for the other
three capacitors.
8. Check the voltage across the terminals of all
capacitors with a DC voltmeter. Voltage should
be zero. If any voltage remains, repeat this
capacitor discharge procedure.
WARNING
Capacitor Solder
Pads
Resistor
FIGURE F.3 – LOCATION OF INPUT FILTER CAPACITOR TERMINALS ON MAIN IGBT INVERTER BOARD
INPUT FILTER CAPACITOR DISCHARGE PROCEDURE (continued)
TROUBLESHOOTING AND REPAIR F-14 F-14
INVERTEC® V205-T AC/DC™
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