Rockwell Automation Publication 7000-TG002J-EN-P - March 2015 53
Fault Messages Chapter 1
X 2U1A OnlineShrt 354 6P or 18P SCR RECTIFIER FAULT
(Online Short-Circuit)
For SCR rectifiers, this fault will occur during operation. Before an
individual leg is fired, the drive takes five samples of the voltage
across that device. This is because the notching on the line could
cause individual readings to be low. If they are all low, the device is
assumed to be short-circuited and a fault occurs. Parameter Rec Dvc
Diag Dly (P266) lets you change the number of consecutive firings to
eliminate nuisance faults. It will still check five times before each
firing, but will now require the condition to exist for the number of
consecutive firings set in the diagnostic delay parameter for a fault to
occur.
For multiple device faults, the risk of a line to line short exists, so tests with MV isolated should be
attempted.
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 cable integrity from SCRGD board transmitter to FOI board receiver.
Replace all faulty components.
For nuisance faults, contact the factory about extending the diagnostic delay.
X 2U1B OnlineShrt 360
X 2U1C OnlineShrt 366
X 2U4A OnlineShrt 357
X 2U4B OnlineShrt 363
X 2U4C OnlineShrt 369
X 2V3A OnlineShrt 356
X 2V3B OnlineShrt 362
X 2V3C OnlineShrt 368
X 2V6A OnlineShrt 359
X 2V6B OnlineShrt 365
X 2V6C OnlineShrt 371
X 2W2A OnlineShrt 355
X 2W2B OnlineShrt 361
X 2W2C OnlineShrt 367
X 2W5A OnlineShrt 358
X 2W5B OnlineShrt 364
X 2W5C OnlineShrt 370
XXXX 3U1B OnlineShrt 420
XXXX 3U4B OnlineShrt 423
XXXX 3V3B OnlineShrt 422
XXXX 3V6B OnlineShrt 425
X X X X 3W2B OnlineShrt 421
X X X X 3W5B OnlineShrt 424
XXXX 4U1C OnlineShrt 426
XXXX 4U4C OnlineShrt 429
XXXX 4V3C OnlineShrt 428
XXXX 4V6C OnlineShrt 431
XXXX 4W2C OnlineShrt 427
XXXX 4W5C OnlineShrt 430
All Drive Types
PF7000A
PF7000B
PF7000C
Marine Drive
Heat pipe Drive
Fault Message Fault Code Description Recommended Action(s)
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