3-30 Troubleshooting
7000-TD002A-EN-P – September 2007
FAULT
MESSAGE
FAULT
CODE
DESCRIPTION RECOMMENDED ACTIONS
2U1A OfflineShrt 390
2U1B OfflineShrt 396
2U1C OfflineShrt 402
2U4A OfflineShrt 393
2U4B OfflineShrt 399
2U4C OfflineShrt 405
2V3A OfflineShrt 392
2V3B OfflineShrt 398
2V3C OfflineShrt 404
2V6A OfflineShrt 395
2V6B OfflineShrt 401
2V6C OfflineShrt 407
2W2A OfflineShrt 391
2W2B OfflineShrt 397
2W2C OfflineShrt 403
2W5A OfflineShrt 394
2W5B OfflineShrt 400
2W5C OfflineShrt 406
3U1B OfflineShrt 444
3U4B OfflineShrt 447
3V3B OfflineShrt 446
3V6B OfflineShrt 449
3W2B OfflineShrt 445
3W5B OfflineShrt 448
4U1C OfflineShrt 450
4U4C OfflineShrt 453
4V3C OfflineShrt 452
4V6C OfflineShrt 455
4W2C OfflineShrt 451
4W5C OfflineShrt 454
6P or 18P SCR RECTIFIER FAULT
(Offline Short-Circuit)
For SCR rectifiers, this fault will occur after
the initial contact closure or during the
diagnostic sequence after a start command.
This is the first test on the rectifier. When all
devices blocking, the feedback from the
devices should toggle from open to short to
open every time the line voltage sine wave
passes through zero. If this is consistently
showing short (no feedback), then the drive
assumes that the device is Short-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 SCRGD
board transmitter to FOI board receiver
– Replace all faulty components
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