Rockwell Automation 7000A PowerFlex Medium Voltage Drive (A-Frame) - Classic Control - Manual (Page 460)

7-22 Troubleshooting
7000A-UM150F-EN-P – June 2013 7000 “A” Frame
FAULT
MESSAGE
FAULT
CODE
DESCRIPTION RECOMMENDED ACTIONS
Slave1 CurrentUB 164 The measured and calculated phase
currents in the Slave 1 Bridge have
exceeded the value set in Line Current
Unbalance Trip (P108) for the duration set in
Line Current Unbalance Delay (P109).
– Verify that all Current Transformer
connections are connected properly and
that no wires are reversed – Ring-out
wires to verify connections
– Check grounding on CTs
– Ensure that all plugs are firmly
connected in the SCBL
– Check that all input voltages are
balanced
– Verify Parameter settings
– Check the burden resistors
– Verify the Input Capacitor values if
installed
– Verify that there are no open sharing
resistors
– Verify all Line Thyristors are firing in
Gating Test Mode
Slave2 CurrentUB 165 The measured and calculated phase
currents in the Slave2 Bridge have
exceeded the value set in Line Current
Unbalance Trip (P108) for the duration set in
Line Current Unbalance Delay (P109).
Slave1 Phasing 168 The voltage phasing on the Slave1 bridge is
not phased the same as the voltages on the
Master bridge.
– Verify cables are terminated correctly
– Verify the feedback wires from the
terminals to the VSB is terminated correctly
– The faults can be masked, and then the
voltages and phasing can be checked
using the test points on the SCB-L, being
aware that there will be phase
differences between the master and
secondary bridges depending on the
drive configuration. Refer to Manual.
Slave2 Phasing 169 The voltage phasing on the Slave 2 bridge is
not phased the same as the voltages in the
Master Bridge.
Slave1 VoltageUB 161 The measured phase voltages in the Slave
1 Bridge have exceeded the value set in
Line Voltage Unbalance Trip (P271) for the
duration set in Line Voltage Unbalance
Delay (P272).
– CHECK TSN FUSING
– Verify the VSB connections and tap
settings, and check resistance of VSB
board – Megger board to confirm
integrity
– Check actual voltage values on the
Operator Interface terminal for each
bridge and the total line voltage
– Check for possible source voltage supply
problems
– Use Multimeter and Oscilloscope to
check voltages on the drive voltage test
points
Slave2 VoltageUB 162 The measured phase voltages in the Slave2
Bridge have exceeded the value set in Line
Voltage Unbalance Trip (P271) for the
duration set in Line Voltage Unbalance
Delay (P272).
Spd Cmd Loss 317 The drive has lost communication with the
device responsible for providing the speed
command to the drive. This has been set to
annunciate as a fault. The drive will
configure the Speed Command Loss as a
fault when the associated bit in Adapter
Loss Mask (P175) is set to a 1. Setting the
bit to 0 will cause the drive to indicate a
warning and run at the last commanded
speed.
– Ensure that the SCANport device is
powered
– Verify the SCANport light status and
ensure the device is operating properly
– Verify the customer SCANport network is
properly communicated with the device
– Check CIB LED status
– Cycle control power to the drive
– Change the Adapter and/or CIB if all
attempts to restore communication fail