Maintenance - Lincoln Electric INVERTEC 300 TP Service Manual

WARNING
ELECTRIC SHOCK can kill
Have an electrician install and service this equipment
Turn the input power off at the fuse box before working
on equipment
Do not touch electrically hot parts
Prior to performing preventive maintenance, perform
the following capacitor discharge procedure to avoid
electric shock.
DC -

MAINTENANCE

DC BUS CAPACITORS DISCHARGE
PROCEDURE
1. Remove input power to the INVERTEC
2. Remove the side panels following the instruction
3. Obtain a high resistance and high wattage resistor
4. Locate the two terminals DC+ and DC – on the
5. Use electrically insulate gloves and insulated
6.
DC +
Figure 1
Showing machine left side
available in this Service Manual.
(25-1000 ohms and 25 watts minimum). This
resistor is NOT supplied with the machine. NEVER
USE A SHORTING STRAP FOR THIS
PROCEDURE.
Inverter Board on the left side of the machine (See
Figure 1).
pliers. Hold the body of the resistor and connect
the resistor leads across the two terminals. Hold
the resistor in place for 10 seconds. DO NOT
TOUCH CAPACITOR TERMINALS WITH YOUR
BARE HANDS.
Check the voltage across the two terminals.
Voltage should be zero. If any voltage remains,
repeat this procedure
.
®
300TP