46 Rockwell Automation Publication 7000-TG002J-EN-P - March 2015
Chapter 1 Fault Messages
X 2U1A Offline 318 PWM RECTIFIER SGCT FAULT
This fault will occur during the initial contactor closure, the
diagnostic sequence after a start command, or the diagnostic
sequence after a stop command. The rectifier monitors the
state of the feedback before a gate pulse is given, and
monitors the feedback after a gate pulse has been sent. The
SGCT has smart diagnostics, so the feedback may indicate
short before firing, and if the pulse is received and the device
is really shorted, the diagnostic will toggle the feedback to let
you know the problem is with the device, or the power supply
for that device.
The firmware now completes a diagnostics sequence
immediately after any drive reset, with the goal of detecting
faults before any destructive action is taken from the next
action. The main example of this is closing the input contactor
on a shorted bridge.
• Complete a resistance check per the instructions in the manual.
• NOTE: SGCTs may not have completely shorted, and still could read in the k range. Any
devices with low suspect readings should be changed.
• Check the LED status of the SGCT gate driver card for abnormal readings.
• Complete a Gating test mode check on the devices.
• Verify the associated 20V power supply is powered and active.
• Verify all the power connections to the SGCT firing card are seated properly.
X 2U1B Offline 324
X 2U1C Offline 330
X 2U4A Offline 321
X 2U4B Offline 327
X 2U4C Offline 333
X 2V3A Offline 320
X 2V3B Offline 326
X2V3C Offline332
X 2V6A Offline 323
X 2V6B Offline 329
X2V6C Offline335
X 2W2A Offline 319
X 2W2B Offline 325
X2W2C Offline331
X 2W5A Offline 322
X 2W5B Offline 328
X2W5C Offline334
All Drive Types
PF7000A
PF7000B
PF7000C
Marine Drive
Heat pipe Drive
Fault Message Fault Code Description Recommended Action(s)
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