52
12
Resettable
Fault
12086 L/R Overtemp
L/R Overtemp. An over temperature
event has occurred in the parallel inductor
or dv/dt filter. High temperature caused
the thermal switch to open. Check cabinet
filters, heatsink fans, intake air
temperatures, and the baffles that help
prevent recirculation of heated air. See
the corresponding diagnostic item in Port
12 [MnStatusWord] Bit 2 ‘LR
OvrTempSw’.
For the Mn power module with Bit 2 ‘LR
OvrTempSw’ set, check the condition
of cabinet air filters. Verify adequate
airflow and the ambient temperature is
within specification. See the technical
data, publication 750-TD100 for
PowerFlex 755T or publication 750-
TD104 for PowerFlex 755TS products.
Coast (Motor Side Inverter).
Additional Fault Action. Fault opens
main circuit breaker: No. Fault can
automatically reset: No. Emergency
override response: 0:455 [Emerg Prot
OVRD] bit 3 ‘MS Pwr Flts’.
12
Resettable
Fault
12087 BusCond BayOTmp
Bus Conditioner Fault or Wiring Bay
Overtemp. Two conditions can cause this
fault:
• Condition 1: A bus conditioner is not
functioning properly.
• Condition 2: High temperature in the
optional exit wiring bay can only
cause the fault in the last motor side
inverter power module.
For example, in a Frame 9 drive that is
M1, or in a Frame 11 drive that is M3. If
the fault occurs in a power module that is
not the last motor side inverter power
module, the cause must be a bus
conditioner. If it occurs in a power module
that is part of the line side converter, the
cause must be a bus conditioner.
• Condition 1: Inspect the bus
conditioners and the thermal
sensor harness for the exit wiring
bay. See the Hardware Service
Manual, publication 750-TG100 for
PowerFlex 755T or publication
750-TG101 for PowerFlex 755TS
products, for details.
• Condition 2: Check the enclosure
filters and fans. Problems with the
baffling between these bays and
adjacent bays can be sources of
heat.
Coast (Motor Side Inverter).
Additional Fault Action. Fault opens
main circuit breaker: No. Fault can
automatically reset: Yes. Emergency
override response: 0:455 [Emerg Prot
OVRD] bit 3 ‘MS Pwr Flts’.
12
Resettable
Fault
12088 Sec Fbk Watchdog
Secondary Feedback Watchdog.
Transmission of the feedback message
(PDI fiber connection on the Mn PLI) from
the DC precharge module has timed out.
If the fault persists, power down and
then check the fiber-optic
communication connections.
Coast (Motor Side Inverter).
Additional Fault Action. Fault opens
main circuit breaker: No. Fault can
automatically reset: Yes. Emergency
override response: 0:455 [Emerg Prot
OVRD] bit 7 ‘Board Faults’.
12
Resettable
Fault
12096 U Pos IOC Flt
U Pos IOC Fault. The Mn power layer
interface (PLI) hardware in the power
module has detected an instantaneous
over current (IOC) event on the positive
side of the U (T1) output phase. Possible
causes include short circuits in the motor
and motor wiring.
Disconnect the motor leads at the
motor and run the drive. If the fault is
not present, suspect a short circuit in
the motor. If fault persists, suspect a
short circuit in the motor leads or Mn
power module. For closed loop
systems, verify feedback functionality.
Detune the velocity/position loop
bandwidth. If a mechanical brake is
installed, verify its functionality.
Coast (Motor Side Inverter).
Additional Fault Action. Fault opens
main circuit breaker: No. Fault can
automatically reset: Yes. Emergency
override response: Cannot override
this fault.
12
Resettable
Fault
12097 V Pos IOC Flt
V Pos IOC Fault. The Mn power layer
interface (PLI) hardware in the power
module has detected an instantaneous
over current (IOC) event on the positive
side of the V (T2) output phase. Possible
causes include short circuits in the motor
and motor wiring.
Disconnect the motor leads at the
motor and run the drive. If the fault is
not present, suspect a short circuit in
the motor. If fault persists, suspect a
short circuit in the motor leads or Mn
power module. For closed loop
systems, verify feedback functionality.
Detune the velocity/position loop
bandwidth. If a mechanical brake is
installed, verify its functionality.
Coast (Motor Side Inverter).
Additional Fault Action. Fault opens
main circuit breaker: No. Fault can
automatically reset: Yes. Emergency
override response: Cannot override
this fault.
12
Resettable
Fault
12098 W Pos IOC Flt
W Pos IOC Fault. The Mn power layer
interface (PLI) hardware in the power
module has detected an instantaneous
over current (IOC) event on the positive
side of the W (T3) output phase. Possible
causes include short circuits in the motor
and motor wiring.
Disconnect the motor leads at the
motor and run the drive. If the fault is
not present, suspect a short circuit in
the motor. If fault persists, suspect a
short circuit in the motor leads or Mn
power module. For closed loop
systems, verify feedback functionality.
Detune the velocity/position loop
bandwidth. If a mechanical brake is
installed, verify its functionality.
Coast (Motor Side Inverter).
Additional Fault Action. Fault opens
main circuit breaker: No. Fault can
automatically reset: Yes. Emergency
override response: Cannot override
this fault.
12
Resettable
Fault
12099 U Neg IOC Flt
U Neg IOC Fault. The Mn power layer
interface (PLI) hardware in the power
module has detected an instantaneous
over current (IOC) event on the negative
side of the U (T1) output phase. Possible
causes include short circuits in the motor
and motor wiring.
Disconnect the motor leads at the
motor and run the drive. If the fault is
not present, suspect a short circuit in
the motor. If the fault persists, suspect
a short circuit in the motor leads or Mn
power module. For closed loop
systems, verify feedback functionality.
Detune the velocity/position loop
bandwidth. If a mechanical brake is
installed, verify its functionality.
Coast (Motor Side Inverter).
Additional Fault Action. Fault opens
main circuit breaker: No. Fault can
automatically reset: Yes. Emergency
override response: Cannot override
this fault.
12
Resettable
Fault
12100 V Neg IOC Flt
V Neg IOC Fault. The Mn power layer
interface (PLI) hardware in the power
module has detected an instantaneous
over current (IOC) event on the negative
side of the V (T2) output phase. Possible
causes include short circuits in the motor
and motor wiring.
Disconnect the motor leads at the
motor and run the drive. If the fault is
not present, suspect a short circuit in
the motor. If the fault persists, suspect
a short circuit in the motor leads or Mn
power module. For closed loop
systems, verify feedback functionality.
Detune the velocity/position loop
bandwidth. If a mechanical brake is
installed, verify its functionality.
Coast (Motor Side Inverter).
Additional Fault Action. Fault opens
main circuit breaker: No. Fault can
automatically reset: Yes. Emergency
override response: Cannot override
this fault.
Table 7 — Fault Codes by Port (cont)
PORT
CONDITION
DISPLAY
TEXT
FAULT ACTION FAULT ACTION
TYPE CODE
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