Rockwell Automation 7000 PowerFlex Medium Voltage AC Drive (B Frame) - Classic Control - Manual (Page 470)

7-48 Troubleshooting
7000-UM150I-EN-P – June 2013 7000 “B” Frame
WARNING
MESSAGE
WARNING
CODE
DESCRIPTION RECOMMENDED ACTIONS
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