INVERTEC V300-I
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F-19
TROUBLESHOOTING & REPAIR
TABLE F.2 — EXPECTED VOLTAGE
READINGS.
a.
If less than 15 VDC difference is
measured between each Switch
Board, test is OK.
b.
If more than 15 VDC difference is
measured between each Switch
Board, Power Board or Switch
Board is damaged. Test these PC
boards and replace if needed.
2. Test VDC across terminals 9 and 12 of
one Switch Board and repeat the test for
the other Switch Board.
NOTE: For 575 VAC ONLY, compare
voltage across 9A and 13 and 13 and
12A; then 9B and 15 and 15 and 12B.
3. Record VDC measured for each Switch
Board and determine the difference in
VDC. (See Table F.2.)
NOTE: The following measurements
should result based on VAC input.
DYNAMIC CAPACITOR BALANCE TEST
(continued)
FIGURE F.11 — SWITCH BOARD TEST POINTS.
L8604-1
SWITCH
9
12
VDC at terminals 9
and 12 should be
If VAC Input is:
approximately:
575VAC
407 VDC
460 VAC
325 VDC
440 VAC
311 VDC
415 VAC
293 VDC
380 VAC
269 VDC
