Hi evryone,

This text describes two types of faults in a Powerflex 40 drive system:

 Auto-Reset/Run: In case of this type of fault, the drive will attempt to automatically reset the fault if the user has set the value of "Auto Rstrt Tries" (A092) to a value greater than "0". A timer (A093) will start counting down, and when it reaches zero, the drive will attempt to reset the fault. If the cause of the fault is no longer present, the fault will be reset and the drive will restart.

  Non-Resetable: This type of fault cannot be automatically reset and requires repair or correction of the underlying cause, such as a wiring or programming error. The cause of the fault must be corrected before the fault can be cleared.

 This text describes the behavior of a drive system when it experiences a fault. The integral keypad provides a visual notification of the fault by flashing the fault number and a flashing fault indicator. To regain control of the integral keypad, the user can press the Escape key.

This text describes the steps to manually clear a fault in a drive system:

Acknowledge the fault by pressing the Esc key. This will remove the fault information from the integral keypad display and allow the user to use it again. The user can view the most recent fault information by accessing "Fault 1 Code" (d007).

Correct the condition that caused the fault. The cause must be fixed before the fault can be cleared.

After fixing the cause, clear the fault by one of the following methods:

Press Stop if the value of "Stop Mode" (P037) is set to a value between "0" and "3".
Cycle the drive power.
Set "Fault Clear" (A100) to "1" or "2".
Cycle a digital input if the value of "Digital Inx Sel" (A051-A054) is set to option 7, "Clear Fault".

This text describes a procedure to clear a fault in a drive system. The procedure consists of the following steps:

Acknowledge the fault by pressing the Esc key. This will remove the fault information from the integral keypad display and allow the user to use it again. The user can view the most recent fault information by accessing "Fault 1 Code" (d007).

Correct the condition that caused the fault. The cause must be fixed before the fault can be cleared.

After fixing the cause, clear the fault by one of the following methods:

Press Stop if the value of "Stop Mode" (P037) is set to a value between "0" and "3".
Cycle the drive power.
Set "Fault Clear" (A100) to "1" or "2".
Cycle a digital input if the value of "Digital Inx Sel" (A051-A054) is set to option 7, "Clear Fault".
The text provides the steps (Option/Step) to clear the fault.
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This text describes how to automatically clear faults in a drive system. There are two methods:

Auto-Reset/Run: This method is used to clear Type 1 faults and restart the drive. To use this method, set "Auto Rstrt Tries" (A092) to a value other than "0" and set "Auto Rstrt Delay" (A093) to a value other than "0".

Clear OverVoltage, UnderVoltage, or Heatsink OvrTmp faults without restarting the drive. To use this method, set "Auto Rstrt Tries" (A092) to a value other than "0" and set "Auto Rstrt Delay" (A093) to "0".

The Auto Restart feature allows the drive to automatically reset faults and restart without user or application intervention, providing remote or "unattended" operation. However, caution should be used when enabling this feature, as certain faults (Type 2) that may indicate drive component malfunction are not resettable.

F13 is a fault code indicating that a ground fault has been detected at one or more of the drive output terminals.A ground fault has been detected in the current path to earth ground at one or more of the drive output terminals. To resolve this issue, check the motor and external wiring to the drive output terminals for any grounded conditions and repair as necessary.

F29 Analog Input Loss is a fault code that indicates that a configured analog input has lost its signal. This fault can be resolved by checking the parameters in the drive configuration and verifying the connections at the analog inputs for any broken or loose connections.

F33 Auto Rstrt Tries is a fault that occurs when the drive has attempted to reset a fault and resume running for the programmed number of A092 [Auto Rstrt Tries], but was unsuccessful. To correct this fault, the cause of the fault must be identified and corrected. Once the cause is corrected, the fault can be cleared manually.

F38, F39, F40 are fault codes related to phase to ground faults in a motor drive system. They indicate that a current path to earth ground has been detected between the drive and motor in Phase U, Phase V, or Phase W respectively. The suggested actions for these fault codes are to check the wiring between the drive and motor, check the motor for grounded phase, and replace the drive if the fault cannot be cleared.

A phase to ground fault has been detected between the drive and motor in this phase.

Check the wiring between the drive and motor.
Check motor for grounded phase.
Replace drive if fault cannot be cleared.

F41, F42, and F43 are error codes that indicate a fault in the drive output terminal wiring between certain phases. F41 is a code for a Phase UV Short, F42 is a code for a Phase V to Gnd, and F41 is a code for a Phase W to Gnd fault. The suggested steps to resolve the error are to check the wiring for a shorted condition and replace the drive if the fault cannot be cleared.


F48 is a fault code indicating that the drive's parameters have been defaulted, likely due to a command or issue with the EEPROM. To resolve this issue, the fault must be cleared or the drive power must be cycled, and then the drive parameters should be reprogrammed as necessary.

F63 is a software overcurrent fault code, which indicates that the drive output current has exceeded the programmed limit set by the parameter A098 [SW Current Trip]. To resolve this issue, you can check the load requirements and adjust the setting of the A098 [SW Current Trip].

The error code F64 Drive Overload indicates that the drive has exceeded its maximum load capacity. To resolve the issue, reduce the load on the drive or extend the acceleration time. Check the drive rating (150% for 1 minute or 200% for 3 seconds) and adjust the load or acceleration time accordingly.


F70 Power Unit is an error code in a drive system indicating a failure has been detected in the drive power section. To resolve the issue, you can try cycling the power, or if the fault cannot be cleared, you may need to replace the drive.

F71 is a fault code indicating a communication network loss. To troubleshoot the issue, the following steps can be taken:

Cycle power to the drive.
Check the communications cabling for any damage or loose connections.
Verify the network adapter settings and make sure they are configured correctly.
Check the status of the external network to see if there are any issues or problems.

F80 refers to SVC mode (Sensorless Vector Control) Autotune fault, which indicates that the autotune function was either cancelled by the user or failed. To resolve this issue, you should restart the autotune procedure.
Restart the autotune procedure.
Check for any issues with the motor or drive settings.
Check for any external factors that may have affected the autotune process, such as an interruption in power or communication.


F81 is a fault code that indicates a communication loss on the RS485 (DSI) port of a drive. To resolve this issue, the following steps should be taken:

Check the wiring to the RS485 port, replace any damaged wiring, port expander, or adapters if necessary.

Verify the connection.

If an adapter was intentionally disconnected, turn off the communication loss action using parameter A105.

This error code F100 is related to the checksum of parameters stored in the drive's memory. It indicates that the checksum calculated by the drive doesn't match the checksum that was read from the board. To resolve this issue, the recommended steps are:

Set parameter P041 [Reset To Defaults] to option 1 "Reset Defaults".
Check the parameters stored in the drive and program them again if necessary.
Check for any hardware issues that might have caused the checksum to get corrupted.

F111 The instructions provided are for resolving issues with the DriveGuard Safe-Off Option (Series B) board installed in a device. If the ENBL enable jumper has not been removed, step 1 is to remove it. Then cycle power. If the DriveGuard Safe-Off Option (Series B) board has failed, remove power to the drive and replace the board. If the hardware enable circuitry has failed, replace the drive.

The F122 error code indicates that a failure has been detected in the drive control and I/O section of the system. Possible actions to resolve the error include cycling power or replacing the drive if the fault cannot be cleared.


This error message is indicating that a fault has occurred in the drive and is indicated by a flashing red status light. To resolve the issue, the following steps can be taken:

Press the stop button.
Cycle the power.
Set the A100 [Fault Clear] parameter to option 1 "Clear Faults".
Cycle the digital input if the A051-A054 [Digital Inx Sel] parameter is set to option 7 "Clear Fault".

These are steps to clear a fault in a drive system. If the red status light on the drive is flashing, indicating that the drive is faulted, you can clear the fault by pressing the stop button, cycling power, setting the A100 [Fault Clear] parameter to option 1 "Clear Faults", or cycling the digital input if A051 - A054 [Digital Inx Sel] is set to option 7 "Clear Fault".

+ Powerflex 40 Fault codes page 1

+ Powerflex 40 Fault codes page 2

+ Powerflex 40 User manuals

+ Allen Bradley main page

++ VFD Main Page 

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