Lincoln Electric INVERTEC V275-S Service Manual page 45

F-15
CAPACITOR BALANCE TEST
9. Check for the appropriate voltages outlined in
Table F.1.
NOTE: Voltages may vary with the input line voltage.
In the event that the capacitor voltage is too
high or too low, the protection circuit will pre-
vent output.
NOTE: The following machine parts must be replaced in matched sets. If Capacitor C1 is found to be defec-
tive, both Capacitors C1 and C2 must be replaced at the same time.
TROUBLESHOOTING & REPAIR
TABLE F.1 Capacitor Voltages
INPUT APPLIED
575 VAC
460 VAC
440 VAC
415 VAC
380 VAC
V275-S
(continued)
10. If the capacitor voltages are NOT balanced, the
capacitors may be in need of "conditioning". See
Maintenance section.
NOTE: The capacitors or other components on the
switch board may be faulty. Replace the main
switch board.
EXPECTED VOLTS DC AT
CAPACITOR TERMINALS
406 VDC
325 VDC
311 VDC
293 VDC
269 VDC
F-15