Dynamic Capacitor Balance Test - Lincoln Electric INVERTEC POWER WAVE 450 SVM112-B Service Manual

F-93
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 control board is receiving the correct
frequency signal from the protection board.
NOTE: Conduct this test after the Static Capacitor Balance Test has been performed suc-
cessfully. The reconnect switch and Jumper A must be set for 380 VAC input voltage or
higher. The selected input voltage must be the actual voltage applied.
MATERIALS NEEDED
Volt/Ohmmeter (Multimeter)
Oscilloscope
5/16" Nut driver
3/8" Nut driver
Input and Reconnect Wiring Diagram – Figure F.33
This procedure takes approximately 45 minutes to perform.
TROUBLESHOOTING & REPAIR

DYNAMIC CAPACITOR BALANCE TEST

WARNING
POWER WAVE 450
F-93