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

Page 500

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7-16

Troubleshooting

7000L-UM300I-EN-P – June 2013

7000 “C” Frame

FAULT

MESSAGE

FAULT

CODE

DESCRIPTION

RECOMMENDED ACTIONS

Motor Current UB

33

The measured current unbalance on the
drive output has exceeded Mtr I UB Trip
(P208) for the duration set in Mtr I UB Delay

(P214).

– Verify the current sensor wiring and

Burden Resistors from the Motor current
sensors

– Verify the HCS power
– Check the Motor Filter Capacitors for

balanced loading on all 3 phases. Refer
to Chapter 6 of the User‟s Manual for
detailed instructions on Testing Filter
Capacitors.

– Investigate the possibility of Motor

winding or cabling problems

Motor DC Link OV

17

DC Link Voltage on the motor side,
measured through the Voltage Sensing
Board, has exceeded Motor DC Overvoltage

Trip (P193) for the duration set in Motor DC
Overvoltage Delay (P194).

– 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 Flux UB

24

The measured Motor Flux has exceeded
Motor Flux Unbalance Trip (P585) for the

duration set in Motor Flux Unbalance Delay
(P586).

– Verify the VSB resistors are not open

and that they are balanced

– Check for the shorted Motor Filter

Capacitors. Refer to Chapter 6 of the

User‟s Manual for detailed instructions
on Testing Filter Capacitors.

– Check for a grounded phase on the drive

system using a megger test

Motor FOB ChA

53

This fault occurs if the Motor Fiber Optic
Interface Board A is not connected, but is

required based on the number of devices
specified (Motor Voltage Dependent).

– Improper parameter settings for Inverter

Series Devices

– Verify parameters
– Damaged FOI Board - Check the LED

status on the FOI board – replace if
necessary

– DCB-M pin damage – Inspect the pins on

the DCB-M and ensure there is no
damage – Replace the DCB-M if
necessary

Motor FOB ChB

54

This fault occurs if the Motor Fiber Optic
Interface Board B is not connected, but is
required based on the number of devices

specified (Motor Voltage Dependent).

Motor FOB ChC

55

This fault occurs if the Motor Fiber Optic
Interface Board C is not connected, but is
required based on the number of devices

specified (Motor Voltage Dependent).

Motor FOB ChA PS

56

The 5VDC power supply to the Motor Fiber

Optic Interface Board A from the Motor DCB
is not present.

Motor FOB ChB PS

57

The 5VDC power supply to the Motor Fiber
Optic Interface Board B from the Motor DCB

is not present.

Motor FOB ChC PS

58

The 5VDC power supply to the Motor Fiber
Optic Interface Board C from the Motor DCB
is not present.