Rockwell Automation 7000 PowerFlex Medium Voltage AC Drive (B Frame) - Classic Control - Manual (Page 433)

Troubleshooting 7-11
7000 “B” Frame 7000-UM150I-EN-P – June 2013
FAULT
MESSAGE
FAULT
CODE
DESCRIPTION RECOMMENDED ACTIONS
Inv HS Sensor 38 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 39 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 28 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)
71 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