Troubleshooting 3-31
7000-TD002A-EN-P – September 2007
FAULT
MESSAGE
FAULT
CODE
DESCRIPTION RECOMMENDED ACTIONS
2U1A OnlineOpen 336
2U1B OnlineOpen 342
2U1C OnlineOpen 348
2U4A OnlineOpen 339
2U4B OnlineOpen 345
2U4C OnlineOpen 351
2V3A OnlineOpen 338
2V3B OnlineOpen 344
2V3C OnlineOpen 350
2V6A OnlineOpen 341
2V6B OnlineOpen 347
2V6C OnlineOpen 353
2W2A OnlineOpen 337
2W2B OnlineOpen 343
2W2C OnlineOpen 349
2W5A OnlineOpen 340
2W5B OnlineOpen 346
2W5C OnlineOpen 352
3U1B OnlineOpen 408
3U4B OnlineOpen 411
3V3B OnlineOpen 410
3V6B OnlineOpen 413
3W2B OnlineOpen 409
3W5B OnlineOpen 412
4U1C OnlineOpen 414
4U4C OnlineOpen 417
4V3C OnlineOpen 416
4V6C OnlineOpen 419
4W2C OnlineOpen 415
4W5C OnlineOpen 418
6P or 18P SCR RECTIFIER FAULT
(Online Open-Circuit)
For SCR rectifiers, this fault will occur during
operation. After a firing signal is sent to a
device, the drive monitors the feedback
status to ensure the voltage drops to zero
across that device, indicating it has been
turned on. If the feedback does not drop to
zero before approximately 30-50 µsec, the
drive will assume the device is open and a
fault will occur. There is a 6 cycle fixed
delay, which means that this has to occur for
6 consecutive firings before the fault is
instigated.
– 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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