Rockwell Automation 21G PowerFlex 750-Series AC Drives Programming Manual - Manual (Page 313)

Rockwell Automation Publication 750-PM001J-EN-P - October 2014 313
Troubleshooting Chapter 6
Drive Fault and Alarm
Descriptions The table below contains a list of drive-specific faults and alarms, the type of fault
or alarm, the action taken when the drive faults, the parameter used to configure
the fault or alarm (if applicable), and a description and action (where applicable).
The faults and alarms listed in
Table 10 only apply to non Integrated Motion
applications. See Table 14 on page 522 for a list of Integrated Motion faults.
Table 10 - Drive Fault and Alarm Types, Descriptions and Actions
Event
No. Fault/Alarm Text Type Fault
Action Configuration
Parameter Auto
Reset Description/Action(s)
0 No Entry
2 Auxiliary Input Resettable
Fault Coast 157 [DI Aux Fault] Y An auxiliary input interlock is open. A condition within the application is
not allowing the drive to energize the motor and the digital input
assigned by P157 [DI Aux Fault] has forced this fault.
3 Power Loss Configurable 449 [Power Loss Actn] Y The DC bus voltage remained below the [Pwr Loss n Level] of nominal
for longer than the time programmed in [Pwr Loss n Time].
4 UnderVoltage Configurable 460 [UnderVltg Action] Y If the bus voltage, P11 [DC Bus Volts] falls below the value set in P461
[UnderVltg Level] an undervoltage condition exists.
5 OverVoltage Resettable
Fault Coast Y The DC bus voltage exceeded the maximum value.
See P11 [DC Bus Volts].
7 Motor Overload Configurable 410 [Motor OL Actn] Y An internal electronic overload trip has occurred.
See P7 [Output Current], P26 [Motor NP Amps, P413 [Mtr OL Factor],
and/or P414 [Mtr OL Hertz].
8 Heatsink OvrTemp Resettable
Fault Coast Y The heatsink temperature has exceeded 100% of the drive temperature.
Heatsink over temperature occurs between 115…120 °C. The exact
value is stored in drive firmware.
See P943 [Drive Temp Pct] and/or P944 [Drive Temp C].
9 Trnsistr OvrTemp Resettable
Fault Coast Y The output transistors have exceeded the maximum operating
temperature.
See P941 [IGBT Temp Pct] and/or P942 [IGBT Temp C].
If using the drive on a chiller plate, P38 [PWM Frequency] must be set to
2 kHz.
10 DynBrake OvrTemp Alarm 1 The dynamic brake resistor has exceeded its maximum operating
temperature.
Check settings of parameters P382 [DB Resistor Type] through P385 [DB
ExtPulseWatts].
12 HW OverCurrent Resettable
Fault Coast Y The drive output current has exceeded the hardware current limit.
Megger test wiring to motor.
13 Ground Fault Resettable
Fault Coast Y A current path to earth ground greater than 25% of drive rating has
occurred.
14 Ground Warning Configurable 466 [Ground Warn Actn] The ground current has exceeded the level set in P467 [Ground Warn
Lvl].
15 Load Loss Configurable 441 [Load Loss Action] The output torque current is below the value programmed in P442 [Load
Loss Level] for a time period greater than the time programmed in P443
[Load Loss Time].
17 Input Phase Loss Configurable 462 [InPhase LossActn] The DC bus ripple has exceeded a preset level. Make these checks and
adjustments in this order.
• Check input impedance balance.
• Increase the setting of P463 [InPhase Loss Lvl] to make the drive less
sensitive.
• Tune the bus regulator or speed regulator to mitigate the affects of
dynamic cyclic loads on DC bus ripple.
• Disable the fault by setting P462 [InPhase LossActn] to 0 “Ignore”
and use an external phase loss detector such as a Bulletin 809S relay.
18 Motor PTC Trip Configurable 250 [PTC Cfg] Motor PTC (Positive Temperature Coefficient) over temperature.
19 Task Overrun Alarm 1 System resource utilization is at or above 90% of capacity. Review the
system resource allocation table on
page 311 .