Rockwell Automation 7000A PowerFlex Medium Voltage Drive (A-Frame) - Classic Control - Manual (Page 481)

Troubleshooting 7-43
7000 “A” Frame 7000A-UM150F-EN-P – June 2013
WARNING
MESSAGE
WARNING
CODE
DESCRIPTION RECOMMENDED ACTIONS
Master UV 112 The measured value V Master Average
(P136) is less than Line Undervoltage Trip
(P167) with respect to 1/3 Rated Line
Voltage (P18) [for 18-pulse drives], and
Rated Line Voltage (P18) [for 6-pulse and
PWM drives] for the period set by Line
Undervoltage Delay (P168).
– Verify the VSB connections and tap
settings, and check resistance of VSB
board – Megger board to confirm integrity
– Check TSN fusing
– Check actual voltage values on the
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 test points
Motor Cap Range 23 The calculated per unit value of the Motor
Filter Capacitor (P128), based on the values
entered for Motor Capacitor kVAR (P20),
Motor Capacitor Volts (P21), and Motor
Capacitor Frequency (P28) is outside of the
normal range of 0.26-0.55 pu. – Verify capacitor nameplate data and
compare with information entered in
drive
– Contact factory
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