Lincoln Electric INVERTEC V250-S - Manual (Page 45)

F-13 TROUBLESHOOTING & REPAIR F-13
7. If the correct test voltages are pre-
sent the auxiliary transformer is good.
8. If any of the voltages are missing or
very low, with the proper primary
voltage applied, the auxiliary trans-
former may be faulty. Replace.
9. If the auxiliary transformer tests good
but does not function when connect-
ed to the V250-S check the harness
wiring to the auxiliary transformer.
See wiring diagram.
AUXILIARY TRANSFORMER TEST (continued)
INVERTEC V250-S
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TEST POINT TEST POINT EXPECTED VOLTAGE
H1 (1J7) H2 (4J7) 200 - 208VAC
H1 (1J7) H4 (3J7) 380 - 415VAC
H1 (1J7) H5 (6J7) 440 - 460VAC
RED LEAD (1J1) RED LEAD (3J1) 18VAC (SECONDARY)
On Control Board On Control Board
TABLE F.1 Auxiliary Transformer Test Points