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

Page 496

7-12

Troubleshooting

7000L-UM300I-EN-P – June 2013

7000 “C” Frame

FAULT

MESSAGE

FAULT

CODE

DESCRIPTION

RECOMMENDED ACTIONS

Inv HS Sensor

While Not Running, The drive has detected
a missing temperature sensor connected to
the TFB on the inverter heatsink. A missing

sensor can result in either a Fiber Optic
Loss fault or a Sensor fault because a
missing sensor can be interpreted as either

0°C or over 100°C, and both are unrealistic
values.

– Verify sensor is completely seated

properly on TFB.

– Measure sensor resistance.
– Replace if necessary.

Inv ChB Sensor

While Not Running, Not normally used: The
drive has detected a missing temperature

sensor connected to the optional TFB
connected to the fiber optic receiver RX7 on
FOI-M-B. A missing sensor can result in

either a Fiber Optic Loss fault or a Sensor
fault because a missing sensor can be
interpreted as either 0°C or over 100°C, and

both are unrealistic values.

Inv HCS Power

The power supplied to the Motor Hall-Effect
Current Sensors (±24VDC) is monitored on
the control board and will fault the drive if
the voltage is out of tolerance.

– Verify the DC voltage on the DC/DC

supply, at the SCB-M terminals, and at
the Current Sensors

– Check the Current Sensor wiring and

ensure all connections are per the
Electrical Drawing

IsoTx Air Filter

(A-Frame Only)

The Pressure sensed by the pressure
transducer in the Integral Isolation
Transformer section (as a voltage) has

dropped below the value set in Pressure
Value Transformer Trip (P654).

– Verify fan rotation
– Check for blocked airflow in the filters /

ducting (if installed) – Clean as required

– Improper Trip settings – Verify Pressure

Value voltage level when running with

clear air flow

– Verify Alarm and Trip set-up procedure

was completed adequately and adjust as
necessary, and compare with expected

values for that specific drive type

– Verify for drives with external ducting that

there is sufficient air to the drive input

– Verify supply voltage to pressure

transducer, and confirm output is stable

Line DC Link OV

172

The DC Link Voltage measured on the Line
side of the DC Link has exceeded Line DC
Overvoltage Trip (P173) for the duration set
in Line DC Overvoltage Delay (P174).

– Verify that the parameters are set

properly

– Verify that there is no problems with

steady-state overvoltages on the input to
the drive

– Ensure all SGCTs are powered
– Verify VSB resistors, grounds,

connections, and tap settings

– Complete a Gating Test on the rectifier

and inverter to confirm devices are firing

– Verify that the waveforms measured on

the SCB-L are as expected