Troubleshooting 3-29
7000-TD002A-EN-P – September 2007
FAULT
MESSAGE
FAULT
CODE
DESCRIPTION RECOMMENDED ACTIONS
2U1A OfflineOpen 372
2U1B OfflineOpen 378
2U1C OfflineOpen 384
2U4A OfflineOpen 375
2U4B OfflineOpen 381
2U4C OfflineOpen 387
2V3A OfflineOpen 374
2V3B OfflineOpen 380
2V3C OfflineOpen 386
2V6A OfflineOpen 377
2V6B OfflineOpen 383
2V6C OfflineOpen 389
2W2A OfflineOpen 373
2W2B OfflineOpen 379
2W2C OfflineOpen 385
2W5A OfflineOpen 376
2W5B OfflineOpen 282
2W5C OfflineOpen 388
3U1B OfflineOpen 432
3U4B OfflineOpen 435
3V3B OfflineOpen 434
3V6B OfflineOpen 437
3W2B OfflineOpen 433
3W5B OfflineOpen 436
4U1C OfflineOpen 438
4U4C OfflineOpen 441
4V3C OfflineOpen 440
4V6C OfflineOpen 443
4W2C OfflineOpen 439
4W5C OfflineOpen 442
6P or 18P SCR RECTIFIER FAULT
(Offline Open-Circuit)
For SCR rectifiers, this fault will occur after
the initial contact closure, or during the
diagnostic sequence after a start command.
After the Short-Circuit test described below,
the drive fires each device, and verifies that
the feedback from that device went low. If
the feedback does not go low, the drive
assumes the SCR must be Open-Circuited.
– Complete a resistance check on the
rectifier, including the gate-cathode
resistance, the snubber and sharing
resistors
– Complete a firing check on the rectifier
– Verify the snubber circuitry, and the
sharing resistors
– Verify fiber optic integrity from FOI board
transmitter to SCRGD board receiver
– Replace all faulty components
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