Rockwell Automation 7000L PowerFlex Medium Voltage AC Drive (C Frame) - Classic Control - Manual (Page 495)

Troubleshooting 7-11
7000 “C” Frame 7000L-UM300I-EN-P – June 2013
FAULT
MESSAGE
FAULT
CODE
DESCRIPTION RECOMMENDED ACTIONS
Input Xfmr/LR OT 136 The temperature switch in the drive Input
Isolation Transformer or Line Reactor has
detected an over-temperature and opened.
There is a thermal switch in each phase
winding, and they are connected in series.
– Verify operating conditions (ambient/
altitude/ current levels/ ventilation and
fans/ cooling oil) and verify that the
Rectifier Transformer/Reactor is within
ratings
– Check the 120V signal through the
thermal switch
– Verify that it is not a faulty switch
– Check the XIO board inputs and
parameter status bits
– Determine through elimination whether
there is a faulty switch and replace if
necessary
Inv HeatSink FO 76 While Not Running, the Fiber Optic signal
from the TFB on the Inverter Heatsink,
connected to Channel A fiber optic receiver
RX7 on FOI-M-A is not present. This is only
a fault while not running. If this occurs while
running it will appear as a warning.
– Check TFB and FOI board for power
– Check the Fiber Optic cables are
properly seated in the transmitters and
receivers
– Check the fiber optic cable for kinks,
bends, breaks that could be blocking the
signal
– This can occur if the sensor is not
connected to the TFB
Inv Temp Ch B FO 77 Not Normally Used: While Not Running, the
Fiber Optic signal from the optional TFB
connected to Channel B fiber optic receiver
RX7 on FOI-M-B is not present. This is only
a fault while not running. If this occurs while
running it will appear as a warning.
Inv HS Low Temp 40 If the measured temperature IHeatsink
Temp C (P253) is less than 2°C, and the
drive is not running, the drive will display this
fault. – Verify that the ambient in the control
room is not below 2°C
– Verify power to the TFB
– There could be a mechanical problem
with the temperature sensor or with the
cable feeding the signal back to the TFB
– Swap with the rectifier hardware to
identify the bad component
Inv ChB Low Temp 41 If the measured temperature Temp I Ch B C
(P552) is less than 2°C, and the drive is not
running, the drive will display this fault. This
is not enabled on most drives, and the
parameter is a high-level parameter.
Inv Heatsink OT 69 The temperature detection on the Inverter
Heatsink, connected to Channel A fiber optic
receiver RX7 on FOI-M-A, has exceeded
Inverter Heatsink Temperature Trip (P315).
– Confirm actual temperature in
parameters is not higher than the trip
value – If so, investigate the conditions of
the drive (ambient/ loading/ elevation /
ventilation/ filter status /heatsink
clogging)
– Check the sensor and temperature
offline (ambient) for accuracy
Inv ChannelB OT 70 Not Normally Used - The temperature
detection on an Inverter Heatsink,
connected to fiber optic receiver RX7 on
FOI-M-B, has exceeded Inverter
Temperature Trip Channel B (P570)