44 Rockwell Automation Publication 7000-TG002J-EN-P - March 2015
Chapter 1 Fault Messages
X U1A Gating Loss 228 INVERTER SGCT FAULT
(Gating Fiber-Optic Loss)
This fault will only occur during the initial contactor closure
and the diagnostic sequence after a start command. The
inverter monitors the state of the feedback before a gate
pulse is given, and monitors the feedback after a gate pulse
has been sent. This fault occurs when the feedback was high
from the device before gating, and is still high from the device
after gating. The drive then assumes the gating pulse must
not have reached the 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
• Check that the fiber-optic cables are seated properly in the optical interface board and the
SGCT firing card.
• Check that the fiber-optic cable is not pinched or damaged.
• Verify that the connection between the DPM and OIB is correctly installed.
• 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 U1B Gating Loss 234
X U1C Gating Loss 240
X U4A Gating Loss 231
X U4B Gating Loss 237
X U4C Gating Loss 243
X V3A Gating Loss 230
X V3B Gating Loss 236
X V3C Gating Loss 242
X V6A Gating Loss 233
X V6B Gating Loss 239
X V6C Gating Loss 245
X W2A Gating Loss 229
X W2B Gating Loss 235
X W2C Gating Loss 241
X W5A Gating Loss 232
X W5B Gating Loss 238
X W5C Gating Loss 244
All Drive Types
PF7000A
PF7000B
PF7000C
Marine Drive
Heat pipe Drive
Fault Message Fault Code Description Recommended Action(s)
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