Rockwell Automation 7000L PowerFlex Medium Voltage AC Drive (C Frame) - Classic Control - Manual (Page 512)

7-28 Troubleshooting
7000L-UM300I-EN-P – June 2013 7000 “C” Frame
FAULT
MESSAGE
FAULT
CODE
DESCRIPTION RECOMMENDED ACTIONS
2U1A Offline OC 366 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
2U1B Offline OC 372
2U1C Offline OC 402
2U4A Offline OC 369
2U4B Offline OC 375
2U4C Offline OC 405
2V3A Offline OC 368
2V3B Offline OC 374
2V3C Offline OC 404
2V6A Offline OC 371
2V6B Offline OC 377
2V6C Offline OC 407
2W2A Offline OC 367
2W2B Offline OC 373
2W2C Offline OC 403
2W5A Offline OC 370
2W5B Offline OC 376
2W5C Offline OC 406
3U1B Offline OC 438
3U4B Offline OC 441
3V3B Offline OC 440
3V6B Offline OC 443
3W2B Offline OC 439
3W5B Offline OC 442
4U1C Offline OC 444
4U4C Offline OC 447
4V3C Offline OC 446
4V6C Offline OC 449
4W2C Offline OC 445
4W5C Offline OC 448