Hi everyone,

The instructions describe the behavior of a device when a fault occurs and the Auto-Reset/Run function is enabled. If the Auto Rstrt Tries (A163) value is set to a number greater than 0, a timer (Auto Rstrt Delay, A164) starts counting down. Once the timer reaches zero, the drive will attempt to reset the fault automatically. If the cause of the fault is no longer present, the fault will be cleared and the drive will restart.

The instructions describe the behavior of a device when a Non-Resetable fault occurs. This type of fault requires repair of the drive or motor, or correction of wiring or programming errors. The cause of the fault must be fixed before it can be cleared.

The instructions describe the behavior of a device when a fault occurs and the integral keypad is used to display it. The fault is indicated by a flashing fault number and a flashing fault indicator on the integral keypad. To regain control of the keypad, the user should press the Escape key.

The instructions describe the steps for clearing faults in a device and the options available for automatically clearing faults. When a fault occurs and the integral keypad displays a flashing fault number and fault indicator, the user should press the Escape key to acknowledge the fault and regain control of the keypad.

The cause of the fault must be corrected before the fault can be cleared, which can be done by pressing Stop, cycling power, setting A197 (Fault Clear) to 1 or 2, or cycling a digital input if T051-T054 (Digital Inx Sel) is set to option 10 (Clear Fault).

The Auto Restart feature allows the drive to automatically reset and start based on user-selected programming, but only certain faults are eligible to be reset.

To clear a Type 1 fault and restart the drive, set A163 (Auto Rstrt Tries) to a non-zero value and A164 (Auto Rstrt Delay) to a non-zero value. To clear an OverVoltage, UnderVoltage, or Heatsink OvrTmp fault without restarting the drive, set A163 (Auto Rstrt Tries) to a non-zero value and A164 (Auto Rstrt Delay) to 0.

F15 Load Loss
- Output current has dropped below the level set in A184 [Load Loss Level].
- Check for load loss (e.g., a broken belt).

F17 Input Phase Loss (FRN 6.xx and later)
- Excessive DC bus ripple voltage detected. See d329 [DC Bus Ripple V].
- Check incoming power for a missing phase or blown fuse. If the drive is used intentionally with single-phase input, apply output derating to 35% of the actual drive rating.

F29 Analog Input Loss
- An analog input is configured to fault on signal loss. A signal loss has occurred.
- Configure with T072 [Analog In Loss].
- Check parameters.
- Check for broken/loose connections at inputs.

F32 Fan Feedback Loss (FRN 6.xx and later)
- A loss of cooling fan feedback has been detected. (Frames E and F only)
- Make sure cooling fans are clear of debris and spinning freely. Replace the fan if necessary.

F33 Auto Restart Tries
- The drive unsuccessfully attempted to reset a fault and resume running for the programmed number of A163 [Auto Restart Tries].
- Correct the cause of the fault and manually clear it.

F38 Phase U to Ground
- 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 the motor for a grounded phase.
- Replace the drive if the fault cannot be cleared.

F39 Phase V to Ground
F40 Phase W to Ground
F41 Phase UV Short
- Excessive current has been detected between these two output terminals.
- Check the motor and drive output terminal wiring for a shorted condition.
- Replace the drive if the fault cannot be cleared.

F42 Phase UW Short
F43 Phase VW Short
F48 Parameters Defaulted
- The drive was commanded to write default values to EEPROM.
- Clear the fault or cycle power to the drive.
- Program the drive parameters as needed.

F63 Software Overcurrent
- Programmed A183 [SW Current Trip] has been exceeded.
- Check load requirements and A183 [SW Current Trip] setting.

F64 Drive Overload
- Drive rating of 110% for 1 minute or 150% for 3 seconds has been exceeded.
- Reduce load or extend Acceleration Time.

F70 Power Unit
- A failure has been detected in the drive's power section.
- Cycle power.
- Replace the drive if the fault cannot be cleared.

F71 Network Loss
- The communication network has faulted.
- Cycle power.
- Check communications cabling.
- Check network adapter settings.
- Check the external network status.

F81 Comm Loss
- The RS485 (DSI) port stopped communicating.
- Check the RS485 wiring connection.
- Check if a communications adapter or HIM was disconnected.
- Increase C106 [Comm Loss Time] to an appropriate time for the application.
- Change C105 [Comm Loss Action] to a value other than "0" (fault), if appropriate for the application.

F94 Function Loss
- P036 [Start Source] is set to setting 6. The input to terminal 01 has been opened.
- Close the input to terminal 01 and restart the drive.

F100 Parameter Checksum
- The checksum read from the board does not match the checksum calculated.
- Set P041 [Reset To Defaults] to option 1 "Reset Defaults".

F122 I/O Board Fail
- A failure has been detected in the drive control and I/O section.
- Cycle power.
- Replace the drive if the fault cannot be cleared.
Here are some common symptoms and corrective actions for troubleshooting issues with a PowerFlex 400 Adjustable Frequency AC Drive:

- No Output Voltage to the Motor
- Check the power circuit, supply voltage, fuses, and disconnects.
- Verify that the motor is connected properly.
- Check control input signals and ensure a Start signal is present, the correct control mode is selected, and relevant parameters like P036 [Start Source] and A166 [Reverse Disable] are set correctly.

- Drive is Faulted (Flashing Red Status Light)
- Clear the fault by pressing Stop, cycling power, setting A197 [Fault Clear] to option 1 "Clear Faults", or cycling the digital input if T051 - T054 [Digital Inx Sel] is set to option 7 "Clear Fault".

- Drive Does Not Start from Start or Run Inputs Wired to the Terminal Block
- Check for incorrect programming, such as P036 [Start Source] set to the wrong option.
- Ensure proper input wiring and that the correct control mode (2-wire or 3-wire) is used.
- Verify that the Sink/Source DIP switch is set correctly.

- Drive Does Not Start from Integral Keypad
- Enable the integral keypad by setting P036 [Start Source] to option 0 "Keypad" and activating the input if needed.
- Verify that the "Stop" input is present.

- Drive Does Not Respond to Changes in Speed Command
- Check the source of the command and ensure the correct reference source is selected.
- Verify the presence of the signal for the speed command source.
- Check for incorrect selection of reference source due to remote device or digital inputs.

- Motor and/or Drive Will Not Accelerate to Commanded Speed
- Check for excessive acceleration time or current limit due to excess load or short acceleration times.
- Verify the speed command source and value.
- Ensure that programming is not limiting the drive output speed.

These are general guidelines, and the specific corrective actions may vary depending on the exact situation and drive configuration.

-------------

+ Powerflex 400 Fault codes page 1

+ Powerflex 400 Fault codes page 2

+ Powerflex 400 User manuals

+ Allen Bradley main page

+ Back to main page   

++ VFD Main Page 

-