Rockwell Automation 7000 PowerFlex Medium Voltage AC Drive (B Frame) - Classic Control - Manual (Page 450)

7-28 Troubleshooting
7000-UM150I-EN-P – June 2013 7000 “B” Frame
FAULT
MESSAGE
FAULT
CODE
DESCRIPTION RECOMMENDED ACTIONS
2U1A Online OC 342 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
2U1B Online OC 348
2U1C Online OC 390
2U4A Online OC 345
2U4B Online OC 351
2U4C Online OC 393
2V3A Online OC 344
2V3B Online OC 350
2V3C Online OC 392
2V6A Online OC 347
2V6B Online OC 353
2V6C Online OC 395
2W2A Online OC 343
2W2B Online OC 349
2W2C Online OC 391
2W5A Online OC 346
2W5B Online OC 352
2W5C Online OC 394
3U1B Online OC 414
3U4B Online OC 417
3V3B Online OC 416
3V6B Online OC 419
3W2B Online OC 415
3W5B Online OC 418
4U1C Online OC 420
4U4C Online OC 423
4V3C Online OC 422
4V6C Online OC 425
4W2C Online OC 421
4W5C Online OC 424