Rockwell Automation 7000L PowerFlex Medium Voltage AC Drive (C Frame) - Classic Control - Manual (Page 513)

Troubleshooting 7-29
7000 “C” Frame 7000L-UM300I-EN-P – June 2013
FAULT
MESSAGE
FAULT
CODE
DESCRIPTION RECOMMENDED ACTIONS
2U1A Offline SC 378 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
2U1B Offline SC 384
2U1C Offline SC 408
2U4A Offline SC 381
2U4B Offline SC 387
2U4C Offline SC 411
2V3A Offline SC 380
2V3B Offline SC 386
2V3C Offline SC 410
2V6A Offline SC 383
2V6B Offline SC 389
2V6C Offline SC 413
2W2A Offline SC 379
2W2B Offline SC 385
2W2C Offline SC 409
2W5A Offline SC 382
2W5B Offline SC 388
2W5C Offline SC 412
3U1B Offline SC 450
3U4B Offline SC 453
3V3B Offline SC 452
3V6B Offline SC 455
3W2B Offline SC 451
3W5B Offline SC 454
4U1C Offline SC 456
4U4C Offline SC 459
4V3C Offline SC 458
4V6C Offline SC 461
4W2C Offline SC 457
4W5C Offline SC 460