Perform the static capacitor, Balance test, Troubleshooting & repair – Lincoln Electric INVERTEC POWER WAVE 450 SVM112-B User Manual

Page 149: Static capacitor balance test, Warning

STATIC CAPACITOR BALANCE TEST

Service and repair should be performed by only Lincoln Electric factory trained personnel.
Unauthorized repairs performed on this equipment may result in danger to the technician or
machine operator and will invalidate your factory warranty. For your safety and to avoid elec-
trical shock, please observe all safety notes and precautions detailed throughout this manual.

If for any reason you do not understand the test procedures or are unable to perform the
test/repairs safely, contact the Lincoln Electric Service Department for electrical trou-
bleshooting assistance before you proceed. Call 1-800-833-9353 (WELD).

TEST DESCRIPTION

This test will determine if, with no machine output, the input capacitors are balanced.

Before conducting this test, perform the following tests:

Switch Board Test - to ensure that none of the switch boards are faulty.

Snubber and Bleeder Resistance Test - to ensure that the bleeder resistors are properly
connected to the switch boards.

Reconnect Switch Test 1 and Reconnect Switch Test 2 - to ensure that input power is
properly connected to the switch boards.

MATERIALS NEEDED

Volt/Ohmmeter (Multimeter)
5/16" Nut driver
3/8" Nut driver
Snubber and Bleeder Resistor Wiring Diagram – Figure F.31

WARNING

TROUBLESHOOTING & REPAIR

F-89

POWER WAVE 450