Rockwell Automation 7000 PowerFlex Medium Voltage AC Drive (B Frame) - Classic Control - Manual (Page 463)

Troubleshooting 7-41
7000 “B” Frame 7000-UM150I-EN-P – June 2013
WARNING
MESSAGE
WARNING
CODE
DESCRIPTION RECOMMENDED ACTIONS
Motor DC Link OV 192 DC Link Voltage on the motor side,
measured through the Voltage Sensing
Board, has exceeded Motor DC Overvoltage
Trip (P193), and instantaneously causes a
warning.
– Verify the motor is connected and the
Output Contactor is not open
– Verify there is no open SGCTs Complete
a Resistance and Firing check
– Check VSB circuit (grounds) through to
SCB-M
– Check Burden resistor values
– Check the trip parameter setting
Motor Load Loss 41 The drive has detected a loss of load
condition. This is activated as a warning
using the parameter Load Loss Detect
(P199), and the necessary setpoints are
Load Loss Level (P246), Load Loss Delay
(P231), and Load Loss Speed (P259).
– Verify the parameter settings
– Ensure that the load should not normally
be in an unloaded condition
Motor OL 17 A Motor Overload warning has been
detected, where the overload condition is
calculated using I Stator (P340) and Motor
Overload Warning (P351) as the point
where the overload warning occurs. P351 is
programmed as a percentage of the
difference between Motor Overload Min
(P350) and Motor Overload Trip (P179).
– Transient Loading - Check torque limit
and overload settings and Compare
loading to torque settings and trip
settings
Motor OV 193 The measured Motor AC Voltage has
exceeded Motor Overvoltage Trip (P181) for
the duration set in Motor Overvoltage Delay
(P182), but this has occurred with the drive
NOT gating (as in a Sync Transfer event)
Possible Causes:
Noise from contactor closure
Self-Excitation – Check for flying
start/induced motor rotation
Motor Protection 68 Standard External Fault/Warning Input
included to allow the end-user to install a
protective relay (IE Bulletin 825 Motor
Protection Relay) auxiliary contact that can
activate a drive fault or warning, depending
on configuration of Motor Prot Class (P443).
– See associated Fault Description
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