Rockwell Automation 7000A PowerFlex Medium Voltage Drive (A-Frame) - Classic Control - Manual (Page 488)

7-50 Troubleshooting
7000A-UM150F-EN-P – June 2013 7000 “A” Frame
WARNING
MESSAGE
WARNING
CODE
DESCRIPTION RECOMMENDED ACTIONS
U1A Device Wrn 228 INVERTER SGCT WARNING
FOR REDUNDANT DEVICES or N-1
CAPABILITY ONLY
This warning 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. 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 problems before
any destructive action is taken from the next
action
– Complete a resistance check per the
instructions in the manual
– NOTE: SGCTs may not have completely
shorted, and still could read in the kΩ
range – Any devices with low suspect
readings should be changed in matched
sets during the next outage
– Check the LED status of the SCGT 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
SCGT firing card are seated properly
– NOTE: For Redundant devices, there
will be no change in the drive operation.
For N-1 drives, the drive will attempt to
run at a load/speed combination that
does not exceed the voltage rating of the
remaining devices.
U1B Device Wrn 234
U1C Device Wrn 246
U4A Device Wrn 231
U4B Device Wrn 237
U4C Device Wrn 249
V3A Device Wrn 230
V3B Device Wrn 236
V3C Device Wrn 242
V6A Device Wrn 233
V6B Device Wrn 239
V6C Device Wrn 251
W2A Device Wrn 229
W2B Device Wrn 235
W2C Device Wrn 247
W5A Device Wrn 232
W5B Device Wrn 238
W5C Device Wrn 250
U1A Online Wrn 216 INVERTER SGCT WARNING
FOR REDUNDANT DEVICES or N-1
CAPABILITY ONLY
This warning will occur during operation of
the drive. The drive has detected that the
feedback from the device was not correct,
and does not wait to determine the exact
problem. The drive polls the entire bridge 3
times before and 3 times after each gating
command. All 6 of these readings for each
device must be consistent for the warning to
occur. There is also a parameter called
Inverter Device Diagnostic Delay (P268),
which allows you to change the number of
consecutive firings to eliminate nuisance
faults. It will still poll 3 times before and
after each firing, but will now require the
condition to exist for the number of
consecutive firings set in the Diagnostic
Delay parameter for a warning to occur.
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
– Complete a resistance check per the
instructions in the manual
– NOTE: SGCTs may not have completely
shorted, and still could read in the kΩ
range – Any devices with low suspect
readings should be changed
– Check the LED status of the SCGT 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
SCGT firing card are seated properly
– For nuisance faults, contact the factory
about extending the Diagnostic Delay
– NOTE: For Redundant devices, there
will be no change in the drive operation.
For N-1 drives, the drive will attempt to
run at a load/speed combination that
does not exceed the voltage rating of the
remaining devices.
U1B Online Wrn 222
U1C Online Wrn 240
U4A Online Wrn 219
U4B Online Wrn 225
U4C Online Wrn 243
V3A Online Wrn 218
V3B Online Wrn 224
V3C Online Wrn 242
V6A Online Wrn 221
V6B Online Wrn 227
V6C Online Wrn 245
W2A Online Wrn 217
W2B Online Wrn 223
W2C Online Wrn 241
W5A Online Wrn 220
W5B Online Wrn 226
W5C Online Wrn 244