Lincoln Electric INVERTEC V250-S Bedienungsanleitung PDF herunterladen (Seite 73)

F-41

TROUBLESHOOTING & REPAIR

F-41

8. Check for the appropriate voltages

outlined in Table F.6. Note:

Voltages may vary with the input

line voltage.

In the event the capacitor voltage is

too high or not balanced (within

20VDC) the protection circuit will pre-

vent output. The overvoltage trip set-

ting is nominal line voltage (230/460)

+15%. Reset occurs about 3% lower

(230/460) +12%.

9. If the capacitor voltages are NOT

balanced within 20VDC the capaci-

tors may be need “conditioning” .

See

maintenance

section.

The capacitors or other components

on the power board may be faulty.

Replace power board.

CAPACITOR BALANCE TEST (continued)

INVERTEC V250-S

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EXPECTED VOLTS

DC AT CAPACITOR

INPUT APPLIED TERMINALS

460VAC 325VDC

440VAC 311VDC

415VAC 293VDC

380VAC 269VDC

TABLE F.6 Capacitor Voltages

NOTE

The following machine parts must be replaced in matched sets If

Capacitor C1 is found to be defective, both Capacitors C1 and C2

must be replaced at the same time:

1 2 ... 68 69 70 71 72 73 74 75 76 77 78 ... 117 118

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Lincoln Electric INVERTEC V250-S Bedienungsanleitung Seite 73