Rockwell Automation 7000L PowerFlex Medium Voltage AC Drive (C Frame) - Classic Control - Manual (Page 499)

Troubleshooting 7-15
7000 “C” Frame 7000L-UM300I-EN-P – June 2013
FAULT
MESSAGE
FAULT
CODE
DESCRIPTION RECOMMENDED ACTIONS
Line FOB ChA PS 214 The 5VDC power supply to the Line Fiber
Optic Interface Board A from the Line DCB
is not present. – Bad 5VDC supply – Check the 5VDC
test point on the DCB-L
– Verify LED status on the FOI Board
– Check all the pins that mount the FOI
board to the DCB and ensure none are
bent/broken
Line FOB ChB PS 215 The 5VDC power supply to the Line Fiber
Optic Interface Board B from the Line DCB
is not present.
Line FOB ChC PS 216 The 5VDC power supply to the Line Fiber
Optic Interface Board C from the Line DCB
is not present.
Master CurrentUB 163 The measured and calculated phase
currents in the Master 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
– Verity that there are no open sharing
resistors.
– Verify all Line Thyristors are firing in
Gating Test Mode
– Check the Line Filter Capacitors (for
PWM rectifier drives). Refer to Chapter 6
of the user manual for detailed
instructions on Testing Filter Capacitors.
Master VoltageUB 160 The measured phase voltages in the Master
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