Rockwell Automation 7000L PowerFlex Medium Voltage AC Drive (C Frame) - Classic Control - Manual (Page 528)

7-44 Troubleshooting
7000L-UM300I-EN-P – June 2013 7000 “C” Frame
WARNING
MESSAGE
WARNING
CODE
DESCRIPTION RECOMMENDED ACTIONS
Mtr Cap OV W 334 Motor Filter Capacitor Over Voltage – This warning occurs when drive is not
gating. It may be when motor is
coasting.
– This is drive output V [Surface voltage
terminology used in ESP application].
The drive gives this warning in an ESP
application only.
– The protection uses P#181 setting but
drive calculates the motor filter cap
voltage [Surface V] which is different
from motor voltage in ESP application.
No DO/OP Ctctr 190 This warning is specifically used for Open
Circuit Test Mode, which demands that an
Output Contactor be specified in IsoSw/Ctctr
Cfg (P192). You will get this warning if the
No DO/OP Ctctr fault is masked, and you
are attempting Open-Circuit Test.
– If there truly is no Output Contactor in the
system, then you can mask the fault.
Then there will be a No OP Ctctr
warning, and you can continue with the
test.
– ENSURE THE OUTPUT OF THE DRIVE
IS TRULY OPEN-CIRCUITED
No PLL Lock 117 The drive has lost synchronization with the
incoming line voltage, and has announced a
Phase Lock Loop warning.
– Capture the voltage waveforms from the
SCB-L test points and examine for
inconsistency
– Verify that the drive power system is
properly grounded
– Check for noise on the control power in
the drive
– Check the grounding for all signal and
control wiring
– Verify the Commutation Inductance
parameter is valid and retune if required
No Tach Installd 36 The drive has sensed that there is no
tachometer/encoder connected, but the
Speed Feedback Mode (P89) has been set
to Pulse Tach.
– Verify whether there is a tachometer
required for the system, and set the
parameter Speed Feedback Mode
accordingly
– Investigate the tachometer for damage
– Verify the wiring from the drive to the
tachometer is per the Electrical Drawing
– Verify the +15VDC supplying the
tachometer is not low/missing
NVRAM Cleared 87 The parameters stored in the NVRAM of the
DCB are corrupt and have been set to
default values. This can occur if new
firmware has been loaded into the DCB or
Power Capacitors are low.
– Reload parameters from Terminal
Memory. DriveTools, Flashcard, or from
a hardcopy
– Replace PowerCap on DCB-L
– If parameters still can not be saved,
replace the DCBs
Opt Flt Config 129 The XIO card which was being assigned to
the Optional Faults Input is not a card which
can be used for this purpose. – Select the proper slot containing the XIO
card which is compatible for Optional
Faults usage.
Opt Flt Conflict 130 The XIO card previously being used for
Optional Faults has been reassigned for
another purpose. – Check the configuration of all XIO slots
and reassign if necessary.