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Fault Indication, Clearing, and Auto Restart for Allen Bradley PowerFlex 40P

Fault Indicatio
+ The drive indicates a fault through its integral LED display by showing:
- Flashing fault number
- Flashing fault indicator
+ To regain control of the display, press the Up Arrow key.

Steps to Manually Clear Faults:

+ Address the Fault Condition:
- Identify and correct the condition that caused the fault. Refer to Table 4.B for fault descriptions and corrective actions.

+ Clear the Fault:
- After taking corrective action, clear the fault using one of the following methods:
* Press and hold the Up Arrow key for three seconds.
* Cycle the drive power.
* Set parameter A100 [Fault Clear] to "1" or "2".
* Cycle the digital input if A051-A054 [Digital Inx Sel] is set to option 7 "Clear Fault".

Automatically Clearing Faults
Steps to Automatically Clear Faults:

+ Clear a Type 1 Fault and Restart the Drive:
- Set parameter A092 [Auto Rstrt Tries] to a value other than "0".
- Set parameter A093 [Auto Rstrt Delay] to a value other than "0".

+ Clear an OverVoltage, UnderVoltage, or Heatsink OvrTmp Fault Without Restarting the Drive:
- Set parameter A092 [Auto Rstrt Tries] to a value other than "0".
- Set parameter A093 [Auto Rstrt Delay] to "0".

Auto Restart (Reset/Run)
Description:
+ The Auto Restart feature enables the drive to automatically reset a fault and attempt to restart without user intervention. This is particularly useful for remote or unattended operations.
+ Important Note: Only certain faults can be reset automatically. Type 2 faults, which indicate possible drive component malfunctions, are not resettable. Fault types and descriptions can be found in Table 4.A and Table 4.B respectively.

+ Caution: Use caution when enabling the Auto Restart feature, as the drive will issue its own start command based on the user-selected programming.

By following these guidelines, you can ensure that faults are handled effectively, maintaining the smooth operation of your Allen Bradley PowerFlex 40P drive.

F2 Auxiliary Input
+ Cause: Auxiliary input interlock is open.
+ Consequence: Drive will not operate.
+ Solution:
- Check remote wiring.
- Verify communications programming for intentional fault.

F3 Power Loss
+ Cause: DC bus voltage remained below 85% of nominal or single-phase operation detected.
+ Consequence: Drive will not operate, production may halt.
+ Solution:
- Monitor the incoming AC line for low voltage or line power interruption.
- Check input fuses.

F4 UnderVoltage
+ Cause: DC bus voltage fell below the minimum value.
+ Consequence: Drive will not operate, system may halt.
+ Solution: Monitor the incoming AC line for low voltage or line power interruption.

F5 OverVoltage
+ Cause: DC bus voltage exceeded the maximum value.
+ Consequence: Drive will not operate, equipment may be damaged due to high voltage.
+ Solution:
- Monitor the AC line for high line voltage or transient conditions.
- Extend the decel time or install a dynamic brake option if motor regeneration is present.

F6 Motor Stalled
+ Cause: Drive is unable to accelerate the motor.
+ Consequence: Motor will not operate, production may halt.
+ Solution:
- Increase P039 - A067 [Accel Time] or reduce the load so drive output current does not exceed the current set by parameter A089 [Current Limit 1].

F7 Motor Overload
+ Cause: Internal electronic overload trip.
+ Consequence: Motor may overheat and get damaged.
+ Solution:
- Reduce the load so drive output current does not exceed the current set by parameter P033 [Motor OL Current].
- Verify the A084 [Boost Select] setting.

F8 Heatsink OverTemperature
+ Cause: Heatsink temperature exceeds a predefined value.
+ Consequence: Drive may overheat and get damaged.
+ Solution:
- Check for blocked or dirty heatsink fins. Ensure ambient temperature has not exceeded 40°C (104°F) for IP 30/NEMA 1/UL Type 1 installations or 50°C (122°F) for IP20/Open type installations.
- Check the fan.

F12 HW OverCurrent
+ Cause: Drive output current has exceeded the hardware current limit.
+ Consequence: Drive will not operate, hardware may be damaged.
+ Solution:
- Check programming.
- Check for excess load, improper A084 [Boost Select] setting, DC brake volts set too high, or other causes of excess current.

F13 Ground Fault
+ Cause: A current path to earth ground has been detected at one or more of the drive output terminals.
+ Consequence: Drive will not operate, potential safety risk.
+ Solution: Check the motor and external wiring to the drive output terminals for a grounded condition.

F29 Analog Input Loss
+ Cause: An analog input is configured to fault on signal loss. A signal loss has occurred.
+ Consequence: Drive will not operate, system error occurs.
+ Solution:
- Configure with A122 [Analog In Loss].
- Check parameters.
- Check for broken/loose connections at inputs.

F33 Auto Rstrt Tries
+ Cause: Drive unsuccessfully attempted to reset a fault and resume running for the programmed number of A092 [Auto Rstrt Tries].
+ Consequence: Drive will not operate, fault persists.
+ Solution: Correct the cause of the fault and manually clear it.

F38 Phase U to Gnd
+ Cause: A phase to ground fault has been detected between the drive and motor in this phase.
+ Consequence: Drive will not operate, hardware may be damaged.
+ Solution:
- Check the wiring between the drive and motor.
- Check the motor for grounded phase.
- Replace the drive if the fault cannot be cleared.

F39 Phase V to Gnd / F40 Phase W to Gnd
+ Cause: Same cause and consequences as F38 Phase U to Gnd fault.
+ Solution: Follow the same solution steps as for F38.

F41 Phase UV Short / F42 Phase UW Short / F43 Phase VW Short
+ Cause: Excessive current has been detected between these two output terminals.
+ Consequence: Drive will not operate, hardware may be damaged.
+ Solution:
- Check the motor and drive output terminal wiring for a shorted condition.
- Replace the drive if the fault cannot be cleared.

F48 Params Defaulted
+ Cause: The drive was commanded to write default values to EEPROM.
+ Consequence: Parameters revert to default values, settings may be lost.
+ Solution:
- Clear the fault or cycle power to the drive.
- Program the drive parameters as needed.

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+ Powerflex 40P Fault codes page 1

+ Powerflex 40P Fault codes page 2

+ Powerflex 40P User manuals

+ Allen Bradley main page

++ VFD Main Page 

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