Allen Bradley PowerFlex 523 Drive Fault Codes List

Complete guide to Allen Bradley PowerFlex 523 fault codes. Learn to read Fxxx codes, use Connected Components Workbench (CCW), and reset trips to restore operation.

PowerFlex 523 Fault Codes Reference Table

Fault Codes	Cause & Solutions
F000 No Fault	Cause: No fault present.
F002 Auxiliary Input	Cause : External trip (Auxiliary) input. Solution: - Check remote wiring. - Verify communications programming for intentional fault.
F003 Power Loss	Cause: Single-phase operation detected with excessive load. Solution: - Monitor the incoming AC line for low voltage or line power interruption. - Check input fuses. - Reduce load.
F004 UnderVoltage	Cause: DC bus voltage fell below the min value. Solution: Monitor the incoming AC line for low voltage or line power interruption.
F005 OverVoltage	Cause: DC bus voltage exceeded max value. Solution: - Monitor the AC line for high line voltage or transient conditions. - Bus overvoltage can also be caused by motor regeneration. - Extend the decel time or install dynamic brake option.
F006 Motor Stalled	Cause: Drive is unable to accelerate or decelerate motor. Solution: - Increase P041, A442, A444, A446 [Accel Time x] or reduce load so drive output current does not exceed the current set by parameter A484, A485 [Current Limit x] for too long. - Check for overhauling load.
F007 Motor Overload	Cause: Internal electronic overload trip. Solution: - An excessive motor load exists. Reduce load so drive output current does not exceed the current set by parameter P033 [Motor OL Current]. - Verify A530 [Boost Select] setting.
F008 Heatsink OvrTmp	Cause: Heatsink/Power Module temperature exceeds a predefined value. Solution: - Check for blocked or dirty heatsink fins. Verify that ambient temperature has not exceeded the rated ambient temperature. - Check fan.
F009 CC OvrTmp	Cause: Control module temperature exceeds a predefined value. Solution: - Check product ambient temperature. - Check for airflow obstruction. - Check for dirt or debris. - Check fan.
F012 HW OverCurrent	Cause: The drive output current has exceeded the hardware current limit. Solution: - Check programming. - Check for excess load, improper A530 [Boost Select] setting, DC brake volts set too high or other causes of excess current.
F013 Ground Fault	Cause: A current path to earth ground has been detected at one or more of the drive output terminals. Solution: - Check the motor and external wiring to the drive output terminals for a grounded condition.
F015 Load Loss	Cause: The output torque current is below the value that is programmed in A490 [Load Loss Level] for a time period greater than the time programmed in A491 [Load Loss Time]. Solution: - Verify connections between motor and load. - Verify level and time requirements.
F021 Output Phase Loss	Cause: Output Phase Loss (if enabled). Configure with A557 [Out Phas Loss En]. Solution: - Verify motor wiring. - Verify motor.
F029 Analog In Loss	Cause: An analog input is configured to fault on signal loss. A signal loss has occurred. Configure with t094 [Anlg In V Loss] or t097 [Anlg In mA Loss]. Solution: - Check for broken/loose connections at inputs. - Check parameters.
F033 Auto Rstrt Tries	Cause: Drive unsuccessfully attempted to reset a fault and resume running for the programmed number of A541 [Auto Rstrt Tries]. Solution: Correct the cause of the fault and manually clear.
F038 Phase U to Gnd	Cause: A phase to ground fault has been detected between the drive and motor in this phase. Solution: - Check the wiring between the drive and motor. - Check motor for grounded phase. - Replace drive if fault cannot be cleared.
F039 Phase V to Gnd	Cause: A phase to ground fault has been detected between the drive and motor in this phase. Solution: - Check the wiring between the drive and motor. - Check motor for grounded phase. - Replace drive if fault cannot be cleared.
F040 Phase W to Gnd	Cause: A phase to ground fault has been detected between the drive and motor in this phase. Solution: - Check the wiring between the drive and motor. - Check motor for grounded phase. - Replace drive if fault cannot be cleared.
F041 Phase UV Short	Cause: Excessive current has been detected between these two output terminals. Solution: - Check the motor and drive output terminal wiring for a shorted condition. - Replace drive if fault cannot be cleared.
F042 Phase UW Short	Cause: Excessive current has been detected between these two output terminals. Solution: - Check the motor and drive output terminal wiring for a shorted condition. - Replace drive if fault cannot be cleared.
F043 Phase VW Short	Cause: Excessive current has been detected between these two output terminals. Solution: - Check the motor and drive output terminal wiring for a shorted condition. - Replace drive if fault cannot be cleared.
F048 Params Defaulted	Cause: The drive was commanded to write default values to EEPROM. Solution: - Clear the fault or cycle power to the drive. - Program the drive parameters as needed.
F059 Safety Open 1	Cause: Both of the safety inputs (Safety 1, Safety 2) are not enabled. Configure with t105 [Safety Open En]. Solution: - Check safety input signals. - If not using safety, verify and tighten jumper for I/O terminals S1, S2, and S+.
F063 SW OverCurrent	Cause: Programmed A486, A488 [Shear Pinx Level] has been exceeded for a time period greater than the time programmed in A487, A489 [Shear Pin x Time]. Solution: - Verify connections between motor and load. - Verify level and time requirements.
F064 Drive Overload	Cause: Drive overload rating has been exceeded. Solution: Reduce load or extend Accel Time.
F070 Power Unit	Cause: Failure has been detected in the drive power section. Solution: - Check that max ambient temperature has not been exceeded. - Cycle power. - Replace drive if fault cannot be cleared.
F071 DSI Net Loss	Cause: Control over the Modbus or DSI communication link has been interrupted. Solution: - Cycle power. - Check communications cabling. - Check Modbus or DSI setting. - Check Modbus or DSI status.
F072 Opt Net Loss	Cause: Control over the network option card’s remote network has been interrupted. Solution: - Cycle power. - Check communications cabling. - Check network adapter setting. - Check external network status.
F073 EN Net Loss	Cause: Control through the embedded EtherNet/IP adapter has been interrupted. Solution: - Cycle power. - Check communications cabling. - Check EtherNet/IP setting. - Check external network status.
F080 Autotune Failure	Cause: The autotune function was either canceled by the user or failed. Solution: Restart procedure.
F081 DSI Comm Loss	Cause: Communications between the drive and the Modbus or DSI master device have been interrupted. Solution: - Cycle power. - Check communications cabling. - Check Modbus or DSI setting. - Check Modbus or DSI status. - Modify using C125 [Comm Loss Action]. - Connecting I/O terminals C1 and C2 to ground may improve noise immunity. - Replace wiring, Modbus master device, or control module.
F082 Opt Comm Loss	Cause: Communications between the drive and the network option card have been interrupted. Solution: - Cycle power. - Reinstall option card in drive. - Modify using C125 [Comm Loss Action]. - Replace wiring, port expander, option card, or control module.
F083 EN Comm Loss	Cause: Internal communications between the drive and the embedded EtherNet/IP adapter have been interrupted. Solution: - Cycle power. - Check EtherNet/IP setting. - Check drive’s Ethernet settings and diagnostic parameters. - Modify using C125 [Comm Loss Action]. - Replace wiring, Ethernet switch, or control module.
F091 Encoder Loss	Cause: Requires differential encoder. One of the 2 encoder channel signals is missing. Solution: - Check Wiring. - If P047, P049, P051 [Speed Referencex] = 16 “Positioning” and A535 [Motor Fdbk Type] = 5 “Quad Check”, swap the Encoder channel inputs or swap any two motor leads. - Replace encoder.
F094 Function Loss	Cause: “Freeze-Fire” (Function Loss) input is inactive, input to the programmed terminal is open. Solution: Close input to the terminal and cycle power.
F100 Parameter Chksum	Cause: Drive parameter non-volatile storage is corrupted. Solution: Set P053 [Reset To Defalts] to 2 “Factory Rset”.
F101 External Storage	Cause: External non-volatile storage has failed. Solution: Set P053 [Reset To Defalts] to 2 “Factory Rset”.
F105 C Connect Err	Cause: Control module was disconnected while drive was powered. Solution: - Clear fault and verify all parameter settings. - Do not remove or install the control module while power is applied.
F106 Incompat C-P	Cause: The PowerFlex 525 control module does not support power modules with 0.25 HP power rating. Solution: - Change to a different power module. - Change to a PowerFlex 523 control module.
F107 Replaced C-P	Cause: The control module could not recognize the power module. - Hardware failure. Solution: - Change to a different power module. - Replace control module if changing power module does not work.
F109 Mismatch C-P	Cause: The control module was mounted to a different drive type power module. Solution: Set P053 [Reset To Defalts] to 3 “Power Reset”.
F110 Keypad Membrane	Cause: Keypad membrane failure / disconnected. Solution: - Cycle power. - Replace control module if fault cannot be cleared.
F111 Safety Hardware	Cause: Safety input enable hardware malfunction. One of the safety inputs is not enabled. Solution: - Check safety input signals. If not using safety, verify and tighten jumper for I/O terminals S1, S2, and S+. - Replace control module if fault cannot be cleared.
F114 uC Failure	Cause: Microprocessor failure. Solution: - Cycle power. - Verify grounding requirements. - Replace control module if fault cannot be cleared.
F122 I/O Board Fail	Cause: Failure has been detected in the drive control and I/O section. Solution: - Cycle power. - Replace drive or control module if fault cannot be cleared.
F125 Flash Update  Req	Cause: The firmware in the drive is corrupt, mismatched, or incompatible with the hardware. Solution: Perform a firmware flash update operation to attempt to load a valid set of firmware.
F126 Non Recoverablw Err	Cause: A nonrecoverable firmware or hardware error was detected. The drive was automatically stopped and reset. Solution: - Clear fault or cycle power to the drive. - Replace drive or control module if fault cannot be cleared.
F127 DSI Flash UpdatReq	Cause: A critical problem with the firmware was detected and the drive is running using backup firmware that only supports DSI communications. Solution: Perform a firmware flash update operation using DSI communications to attempt to load a valid set of firmware.

How to Read PowerFlex 523 Faults via Software

While the built-in LCD display provides basic codes, connecting your PC to the drive via USB allows for deeper analysis. For 2026 diagnostics, it is recommended to use Connected Components Workbench (CCW).

• Fault History Parameters: Unlike some drives that store logs in a separate menu, the PowerFlex 523 stores the last three faults in specific parameters: b007 (Most Recent Fault), b008, and b009.
• Drive Status Indicators: Using CCW, you can view live monitoring of the DC Bus Voltage, Output Current, and Logic Command status at the exact moment of operation to diagnose intermittent trips.
• MainsFree™ Programming: The PowerFlex 523 allows you to upload fault data and parameters via USB even when the main power is disconnected, provided the control module is accessible.

Frequently Asked Questions (FAQ)

Q: What is the difference between a Fault and an Alarm?

A: A Fault (Fxxx) indicates a critical condition that stops the drive to protect equipment (e.g., F005 OverVoltage). An Alarm indicates a condition that may require attention but allows the drive to continue running. Alarms are split into Type 1 (txxx) and Type 2 (axxx).

Q: How do I reset a PowerFlex 523 fault?

A: You can reset the drive using one of the following methods:

• Press the Stop/Clear key on the keypad.
• Toggle a Digital Input configured for “Clear Fault” (typically configured in parameters t062-t063).
• Cycle power to the drive (turn it off and back on).

Q: Why does my drive say “F013 Ground Fault”?

A: This is one of the most common faults. It detects a current path to the earth ground at one or more of the drive output terminals. Check your motor cabling for nicks, moisture in the motor peckerhead, or insulation failure using a Megger test.