PowerFlex 70 Fault Codes08/28/2018The Allen Bradley PowerFlex 70 series of AC drive constantly monitors it's status for fault conditions. When a fault occurs, often it is able to be corrected immediately to continue operation. Below is a listing of fault codes along with their corresponding name, a description of the cause of the fault, and a possible corrective action to take. Fault Name/Description/Action 2 Auxiliary Input Auxiliary input interlock is open. Check remote wiring. ----- 3 Power Loss DC bus voltage remained below 85% of nominal for longer than [Power Loss Time]. Enable/ Disable with [Fault Config 1]. Monitor the incoming AC line for low voltage or line power interruption. ----- 4 UnderVoltage DC bus voltage fell below the minimum value of 509V DC at 600V input, 407V DC at 400/480V input or 204V DC at 200/240V input. Enable/Disable with [Fault Config 1]. Monitor the incoming AC line for low voltage or power interruption. ----- 5 OverVoltage DC bus voltage exceeded maximum value. 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. ----- 7 Motor Overload Internal electronic overload trip. Enable/Disable with [Fault Config 1]. An excessive motor load exists. Reduce load so drive output current does not exceed the current set by [Motor NP FLA]. ----- 8 Heatsink OvrTemp Heatsink temperature exceeds 100% of [Drive Temp]. 1. Verify that maximum ambient temperature has not been exceeded. 2. Check fan. 3. Check for excess load. ----- 9 Trnsistr OvrTemp Output transistors have exceeded their maximum operating temperature. 1. Verify that maximum ambient temperature has not been exceeded. 2. Check fan. 3. Check for excessive load. ----- 12 HW OverCurrent The drive output current has exceeded the hardware current limit. Check programming. Check for excess load, improper DC boost setting, DC brake volts set too high or other causes of excess current. ----- 13 Ground Fault A current path to earth ground greater than 25% of drive rating. Check the motor and external wiring to the drive output terminals for a grounded condition. ----- 24 Decel Inhibit The drive is not following a commanded deceleration because it is attempting to limit bus voltage. 1. Verify input voltage is within drive specified limits. 2. Verify system ground impedance follows proper grounding techniques. 3. Disable bus regulation and/or add dynamic brake resistor and/ or extend deceleration time. ----- 25 OverSpeed Limit Functions such as Slip Compensation or Bus Regulation have attempted to add an output frequency adjustment greater than that programmed in [Overspeed Limit]. Remove excessive load or overhauling conditions or increase [Overspeed Limit]. ----- 29 Analog In Loss An analog input is configured to fault on signal loss. A signal loss has occurred. Configure with [Anlg In 1, 2 Loss] 1. Check parameters. 2. Check for broken/loose connections at inputs. ----- 33 Auto Rstrt Tries Drive unsuccessfully attempted to reset a fault and resume running for the programmed number of [Flt RstRun Tries]. Enable/Disable with [Fault Config]. Correct the cause of the fault and manually clear. ----- 36 SW OverCurrent Drive output current has exceeded the ms current rating. This rating is greater than the second current rating and less than the hardware overcurrent fault level. It is typically 200-250% of the drive continuous rating. Check for excess load, improper DC boost setting. DC brake volts set too high. ----- 38 Phase U to Grnd A phase to ground fault has been detected between the drive and motor in this phase. 1. Check the wiring between the drive and motor. 2. Check motor for grounded phase. 3. Replace drive. ----- 39 Phase V to Grnd A phase to ground fault has been detected between the drive and motor in this phase. 1. Check the wiring between the drive and motor. 2. Check motor for grounded phase. 3. Replace drive. ----- 40 Phase W to Grnd A phase to ground fault has been detected between the drive and motor in this phase. 1. Check the wiring between the drive and motor. 2. Check motor for grounded phase. 3. Replace drive. ----- 41 Phase UV Short Excessive current has been detected between these two output terminals. 1. Check the motor and drive output terminal wiring for a shorted condition. 2. Replace drive. ----- 42 Phase VW Short Excessive current has been detected between these two output terminals. 1. Check the motor and drive output terminal wiring for a shorted condition. 2. Replace drive. ----- 43 Phase UW Short Excessive current has been detected between these two output terminals. 1. Check the motor and drive output terminal wiring for a shorted condition. 2. Replace drive. ----- 48 Params Defaulted The drive was commanded to write default values to EEPROM. 1. Clear the fault or cycle power to the drive. 2. Program the drive parameters as needed. ----- 63 Shear Pin Programmed [Current Lmt Val] has been exceeded. Enable/Disable with [Fault Config 1]. Check load requirements and [Current Lmt Val] setting. ----- 64 Drive OverLoad Drive rating of 0% for minute or 50% for seconds has been exceeded. Reduce load or extend Accel Time. ----- 70 Power Unit One or more of the output transistors were operating in the active region instead of desaturation. This can be caused by excessive transistor current or insufficient base drive voltage. 1. Check for damaged output transistors. 2. Replace drive. ----- 71-75 Port 1-5 Adapter The communications card has a fault. Check DPI device event queue and corresponding fault information for the device. ----- 77 IR Volts Range “Calculate” is the autotune default and the value determined by the autotune procedure for IR Drop Volts is not in the range of acceptable values. Re-enter motor nameplate data. ----- 78 FluxAmpsRef Rang The value for flux amps determined by the Autotune procedure exceeds the programmed [Motor NP FLA]. 1. Reprogram [Motor NP FLA] with the correct motor nameplate value. 2. Repeat Autotune. ----- 79 Excessive Load Motor did not come up to speed in the allotted time during autotune. 1. Uncouple load from motor. 2. Repeat Autotune. ----- 80 AutoTune Aborted Autotune function was canceled by the user or a fault occurred. Restart procedure. ----- 81-85 Port 1-5 DPI Loss DPI port stopped communicating. A SCANport device was connected to a drive operating DPI devices at 500k baud. 1. If adapter was not intentionally disconnected, check wiring to the port. Replace wiring, port expander, adapters, Main Control Board or complete drive as required. 2. Check HIM connection. 3. If an adapter was intentionally disconnected and the [Logic Mask] bit for that adapter is set to “1”, this fault will occur. To disable this fault, set the [Logic Mask] bit for the adapter to “0.” ----- 100 Parameter Chksum The checksum read from the board does not match the checksum calculated. 1. Restore defaults. 2. Reload User Set if used. ----- 101 UserSet Chksum The checksum read from the user set does not match the checksum calculated. Re-save user set. ----- 102 UserSet Chksum The checksum read from the user set does not match the checksum calculated. Re-save user set. ----- 103 UserSet Chksum The checksum read from the user set does not match the checksum calculated. Re-save user set. 104 Pwr Brd Chksum The checksum read from the EEPROM does not match the checksum calculated from the EEPROM data. Clear the fault or cycle power to the drive. ----- 105 Pwr Brd Chksum The checksum read from the board does not match the checksum calculated. 1. Cycle power to the drive. 2. If problem persists, replace drive. ----- 106 Incompat MCB-PB Drive rating information stored on the power board is incompatible with the main control board. Load compatible version files into drive. ----- 107 Replaced MCB-PB Main Control Board was replaced and parameters were not programmed. 1. Restore defaults. 2. Reprogram parameters. ----- 108 Anlg Cal Chksum The checksum read from the analog calibration data does not match the checksum calculated. Replace drive. Many of the actions called out above is to replace the drive. This is where the repair experts at Precision Electronic Services can get you back into operation without the high cost of replacement. Give us a call today at 800-732-4695 and put us to work for you. Back To Blog
PowerFlex 70 Fault Codes08/28/2018The Allen Bradley PowerFlex 70 series of AC drive constantly monitors it's status for fault conditions. When a fault occurs, often it is able to be corrected immediately to continue operation. Below is a listing of fault codes along with their corresponding name, a description of the cause of the fault, and a possible corrective action to take. Fault Name/Description/Action 2 Auxiliary Input Auxiliary input interlock is open. Check remote wiring. ----- 3 Power Loss DC bus voltage remained below 85% of nominal for longer than [Power Loss Time]. Enable/ Disable with [Fault Config 1]. Monitor the incoming AC line for low voltage or line power interruption. ----- 4 UnderVoltage DC bus voltage fell below the minimum value of 509V DC at 600V input, 407V DC at 400/480V input or 204V DC at 200/240V input. Enable/Disable with [Fault Config 1]. Monitor the incoming AC line for low voltage or power interruption. ----- 5 OverVoltage DC bus voltage exceeded maximum value. 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. ----- 7 Motor Overload Internal electronic overload trip. Enable/Disable with [Fault Config 1]. An excessive motor load exists. Reduce load so drive output current does not exceed the current set by [Motor NP FLA]. ----- 8 Heatsink OvrTemp Heatsink temperature exceeds 100% of [Drive Temp]. 1. Verify that maximum ambient temperature has not been exceeded. 2. Check fan. 3. Check for excess load. ----- 9 Trnsistr OvrTemp Output transistors have exceeded their maximum operating temperature. 1. Verify that maximum ambient temperature has not been exceeded. 2. Check fan. 3. Check for excessive load. ----- 12 HW OverCurrent The drive output current has exceeded the hardware current limit. Check programming. Check for excess load, improper DC boost setting, DC brake volts set too high or other causes of excess current. ----- 13 Ground Fault A current path to earth ground greater than 25% of drive rating. Check the motor and external wiring to the drive output terminals for a grounded condition. ----- 24 Decel Inhibit The drive is not following a commanded deceleration because it is attempting to limit bus voltage. 1. Verify input voltage is within drive specified limits. 2. Verify system ground impedance follows proper grounding techniques. 3. Disable bus regulation and/or add dynamic brake resistor and/ or extend deceleration time. ----- 25 OverSpeed Limit Functions such as Slip Compensation or Bus Regulation have attempted to add an output frequency adjustment greater than that programmed in [Overspeed Limit]. Remove excessive load or overhauling conditions or increase [Overspeed Limit]. ----- 29 Analog In Loss An analog input is configured to fault on signal loss. A signal loss has occurred. Configure with [Anlg In 1, 2 Loss] 1. Check parameters. 2. Check for broken/loose connections at inputs. ----- 33 Auto Rstrt Tries Drive unsuccessfully attempted to reset a fault and resume running for the programmed number of [Flt RstRun Tries]. Enable/Disable with [Fault Config]. Correct the cause of the fault and manually clear. ----- 36 SW OverCurrent Drive output current has exceeded the ms current rating. This rating is greater than the second current rating and less than the hardware overcurrent fault level. It is typically 200-250% of the drive continuous rating. Check for excess load, improper DC boost setting. DC brake volts set too high. ----- 38 Phase U to Grnd A phase to ground fault has been detected between the drive and motor in this phase. 1. Check the wiring between the drive and motor. 2. Check motor for grounded phase. 3. Replace drive. ----- 39 Phase V to Grnd A phase to ground fault has been detected between the drive and motor in this phase. 1. Check the wiring between the drive and motor. 2. Check motor for grounded phase. 3. Replace drive. ----- 40 Phase W to Grnd A phase to ground fault has been detected between the drive and motor in this phase. 1. Check the wiring between the drive and motor. 2. Check motor for grounded phase. 3. Replace drive. ----- 41 Phase UV Short Excessive current has been detected between these two output terminals. 1. Check the motor and drive output terminal wiring for a shorted condition. 2. Replace drive. ----- 42 Phase VW Short Excessive current has been detected between these two output terminals. 1. Check the motor and drive output terminal wiring for a shorted condition. 2. Replace drive. ----- 43 Phase UW Short Excessive current has been detected between these two output terminals. 1. Check the motor and drive output terminal wiring for a shorted condition. 2. Replace drive. ----- 48 Params Defaulted The drive was commanded to write default values to EEPROM. 1. Clear the fault or cycle power to the drive. 2. Program the drive parameters as needed. ----- 63 Shear Pin Programmed [Current Lmt Val] has been exceeded. Enable/Disable with [Fault Config 1]. Check load requirements and [Current Lmt Val] setting. ----- 64 Drive OverLoad Drive rating of 0% for minute or 50% for seconds has been exceeded. Reduce load or extend Accel Time. ----- 70 Power Unit One or more of the output transistors were operating in the active region instead of desaturation. This can be caused by excessive transistor current or insufficient base drive voltage. 1. Check for damaged output transistors. 2. Replace drive. ----- 71-75 Port 1-5 Adapter The communications card has a fault. Check DPI device event queue and corresponding fault information for the device. ----- 77 IR Volts Range “Calculate” is the autotune default and the value determined by the autotune procedure for IR Drop Volts is not in the range of acceptable values. Re-enter motor nameplate data. ----- 78 FluxAmpsRef Rang The value for flux amps determined by the Autotune procedure exceeds the programmed [Motor NP FLA]. 1. Reprogram [Motor NP FLA] with the correct motor nameplate value. 2. Repeat Autotune. ----- 79 Excessive Load Motor did not come up to speed in the allotted time during autotune. 1. Uncouple load from motor. 2. Repeat Autotune. ----- 80 AutoTune Aborted Autotune function was canceled by the user or a fault occurred. Restart procedure. ----- 81-85 Port 1-5 DPI Loss DPI port stopped communicating. A SCANport device was connected to a drive operating DPI devices at 500k baud. 1. If adapter was not intentionally disconnected, check wiring to the port. Replace wiring, port expander, adapters, Main Control Board or complete drive as required. 2. Check HIM connection. 3. If an adapter was intentionally disconnected and the [Logic Mask] bit for that adapter is set to “1”, this fault will occur. To disable this fault, set the [Logic Mask] bit for the adapter to “0.” ----- 100 Parameter Chksum The checksum read from the board does not match the checksum calculated. 1. Restore defaults. 2. Reload User Set if used. ----- 101 UserSet Chksum The checksum read from the user set does not match the checksum calculated. Re-save user set. ----- 102 UserSet Chksum The checksum read from the user set does not match the checksum calculated. Re-save user set. ----- 103 UserSet Chksum The checksum read from the user set does not match the checksum calculated. Re-save user set. 104 Pwr Brd Chksum The checksum read from the EEPROM does not match the checksum calculated from the EEPROM data. Clear the fault or cycle power to the drive. ----- 105 Pwr Brd Chksum The checksum read from the board does not match the checksum calculated. 1. Cycle power to the drive. 2. If problem persists, replace drive. ----- 106 Incompat MCB-PB Drive rating information stored on the power board is incompatible with the main control board. Load compatible version files into drive. ----- 107 Replaced MCB-PB Main Control Board was replaced and parameters were not programmed. 1. Restore defaults. 2. Reprogram parameters. ----- 108 Anlg Cal Chksum The checksum read from the analog calibration data does not match the checksum calculated. Replace drive. Many of the actions called out above is to replace the drive. This is where the repair experts at Precision Electronic Services can get you back into operation without the high cost of replacement. Give us a call today at 800-732-4695 and put us to work for you.