PowerFlex 700 Fault Codes04/06/2017Troubleshooting your Allen Bradley PowerFlex 700 AC drive begins with a fault condition that occurs while operating or starting up. The status of your drive is monitored at all times and any changes in the status will be indicated through the keypad. A fault is a condition that stops the drive and will have to be corrected before the fault can be reset and the drive started. Below is a list of faults and possible causes. If a fault can not be reset, it may be an indication the the PowerFlex 700 drive is in need of repair.Fault 29 - Analog In Loss - An analog input is configured to fault on signal loss. A signal loss has occurred.Fault 108 - Anlg Cal Chksum - The checksum read from the analog calibration data does not match the checksum calculated. Fault 33 - Auto Rstrt Tries - Drive unsuccessfully attempted to reset a fault and resume running for the programmed number of [Flt RstRun Tries].Fault 80 - AutoTune Aborted - Autotune function was canceled by the user or a fault occurred. Fault 2 - Auxiliary Input - Auxiliary input interlock is open. Fault 55 - Cntl Bd Overtemp - The temperature sensor on the Main Control Board detected excessive heat. Fault 69 - DB Resistance - Resistance of the internal DB resistor is out of range. Fault 24 - Decel Inhibit - The drive is not following a commanded deceleration because it is attempting to limit bus voltage. Fault 64 - Drive OverLoad - Drive rating of 110% for 1 minute or 150% for 3 seconds has been exceeded. Fault 49 - Drive Powerup - No fault displayed. Used as a Power Up Marker in the Fault Queue indicating that the drive power has been cycled. Fault 79 - Excessive Load - Motor did not come up to speed in the allotted time during autotune. Fault 91 - Encoder Loss - Requires differential encoder. One of the two encoder channel signals is missing. Fault 90 - Encoder Quad Err - Both encoder channels changed state within one clock cycle. Fault 900-930 - Fatal Faults - Diagnostic code indicating a drive malfunction. Fault 52 - Faults Cleared - No fault displayed. Used as a marker in the Fault Queue indicating that the fault clear function was performed. Fault 51 - Flt QueueCleared - No fault displayed. Used as a marker in the Fault Queue indicating that the clear queue function was performed. Fault 78 - FluxAmpsRef Rang - The value for flux amps determined by the Autotune procedure exceeds the programmed [Motor NP FLA]. Fault 13 - Ground Fault - current path to earth ground greater than 25% of drive rating. Fault 93 - Hardware Fault - Hardware enable is disabled (jumpered high) but logic pin is still low. Fault 130 - Hardware Fault - Gate array load error. Fault 131 - Hardware Fault - Dual port failure. Fault 18 - Hardware PTC - Motor PTC (Positive Temperature Coefficient) Overtemp. Fault 10 - Heatsink LowTemp - Annunciates a too low temperature case or an open NTC (heatsink temperature sensing device) circuit. Fault 8 - Heatsink OvrTemp - Heatsink temperature exceeds 100% of [Drive Temp] or is less than approximately -19 °C. Fault 12 - HW OverCurrent - The drive output current has exceeded the hardware current limit. Fault 106 - Incompat MCB-PB - Drive rating information stored on the power board is incompatible with the main control board. Fault 121 - I/O Comm Loss - I/O Board lost communications with the Main Control Board. Fault 122 - I/O Failure - I/O was detected, but failed the powerup sequence. Fault 17 - Input Phase Loss - The DC bus ripple has exceeded a preset level. Fault 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.Fault 87 - IXo VoltageRange - Voltage calculated for motor inductive impedance exceeds 25% of [Motor NP Volts]. Fault 15 - Load Loss - Drive output torque current is below [Load Loss Level] for a time period greater than [Load Loss time]. Fault 7 - Motor Overload - Internal electronic overload trip.Fault 16 - Motor Thermistor - Thermistor output is out of range. Fault 109 - NVS I/O Checksum - EEprom checksum error. Fault 110 - NVS I/O Failure - EEprom I/O error. Fault 21 - Output PhaseLoss - Current in one or more phases has been lost or remains below a preset level. Fault 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].Fault 5 - OverVoltage - DC bus voltage exceeded maximum value. Fault 100 - Parameter Chksum - The checksum read from the board does not match the checksum calculated. Fault 48 - Params Defaulted - The drive was commanded to write default values to EEPROM. Fault 38 - Phase U to Grnd - A phase to ground fault has been detected between the drive and motor in this phase. Fault 39 - Phase V to Grnd - A phase to ground fault has been detected between the drive and motor in this phase. Fault 40 - Phase W to Grnd - A phase to ground fault has been detected between the drive and motor in this phase. Fault 41 - Phase UV Short - Excessive current has been detected between these two output terminals. Fault 42 - Phase VW Short - Excessive current has been detected between these two output terminals. Fault 43 - Phase UW Short - Excessive current has been detected between these two output terminals. Fault 71 - Port 1 Adapter - The communications card has a fault. Fault 72 - Port 2 Adapter - The communications card has a fault. Fault 73 - Port 3 Adapter - The communications card has a fault. Fault 74 - Port 4 Adapter - The communications card has a fault. Fault 75 - Port 5 Adapter - The communications card has a fault. Fault 76 - Port 6 Adapter - The communications card has a fault. Fault 111 - Power Down - EEPROM data is corrupt on drive power up. Fault 3 - Power Loss - DC bus voltage remained below 85% of nominal for longer than [Power Loss Time]. Fault 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. Fault 92 - Pulse In Loss - Z Channel is selected as a pulse input and no signal is present. Fault 104 - Pwr Brd Chksum1 - The checksum read from the EEPROM does not match the checksum calculated from the EEPROM data. Fault 105 - Pwr Brd Chksum2 - The checksum read from the board does not match the checksum calculated. Fault 107 - Replaced MCB-PB - Main Control Board was replaced and parameters were not programmed. Fault 28 - See Manual - Encoderless TorqProve has been enabled but user has not read and understood application concerns of encoderless operation. Fault 63 - Shear Pin - Programmed [Current Lmt Val] has been exceeded. Fault 88 - Software Fault - Microprocessor handshake error. Fault 89 - Software Fault - Microprocessor handshake error. Fault 36 - SW OverCurrent - Drive output current has exceeded the 1ms current rating. This rating is greater than the 3 second current rating and less than the hardware overcurrent fault level. It is typically 200- 250% of the drive continuous rating. Fault 20 - TorqPrv Spd Band - Difference between [Commanded Speed] and [Encoder Speed] has exceeded the level set in [Spd Dev Band] for a time period greater than [Spd Band Integrat]. Fault 9 - Trnsistr OvrTemp - Output transistors have exceeded their maximum operating temperature. Fault 4 - UnderVoltage - DC bus voltage fell below the minimum value of 407V DC at 400/480V input or 204V DC at 200/240V input. Fault 101 - UserSet1 Chksum - The checksum read from the user set does not match the checksum calculated.Fault 102 - UserSet2 Chksum - The checksum read from the user set does not match the checksum calculated.Fault 103 - UserSet3 Chksum - The checksum read from the user set does not match the checksum calculated.If your fault can not be cleared, call 800-732-4695 for the PowerFlex 700 repair experts at Precision Electronic Services. Back To Blog
PowerFlex 700 Fault Codes04/06/2017Troubleshooting your Allen Bradley PowerFlex 700 AC drive begins with a fault condition that occurs while operating or starting up. The status of your drive is monitored at all times and any changes in the status will be indicated through the keypad. A fault is a condition that stops the drive and will have to be corrected before the fault can be reset and the drive started. Below is a list of faults and possible causes. If a fault can not be reset, it may be an indication the the PowerFlex 700 drive is in need of repair.Fault 29 - Analog In Loss - An analog input is configured to fault on signal loss. A signal loss has occurred.Fault 108 - Anlg Cal Chksum - The checksum read from the analog calibration data does not match the checksum calculated. Fault 33 - Auto Rstrt Tries - Drive unsuccessfully attempted to reset a fault and resume running for the programmed number of [Flt RstRun Tries].Fault 80 - AutoTune Aborted - Autotune function was canceled by the user or a fault occurred. Fault 2 - Auxiliary Input - Auxiliary input interlock is open. Fault 55 - Cntl Bd Overtemp - The temperature sensor on the Main Control Board detected excessive heat. Fault 69 - DB Resistance - Resistance of the internal DB resistor is out of range. Fault 24 - Decel Inhibit - The drive is not following a commanded deceleration because it is attempting to limit bus voltage. Fault 64 - Drive OverLoad - Drive rating of 110% for 1 minute or 150% for 3 seconds has been exceeded. Fault 49 - Drive Powerup - No fault displayed. Used as a Power Up Marker in the Fault Queue indicating that the drive power has been cycled. Fault 79 - Excessive Load - Motor did not come up to speed in the allotted time during autotune. Fault 91 - Encoder Loss - Requires differential encoder. One of the two encoder channel signals is missing. Fault 90 - Encoder Quad Err - Both encoder channels changed state within one clock cycle. Fault 900-930 - Fatal Faults - Diagnostic code indicating a drive malfunction. Fault 52 - Faults Cleared - No fault displayed. Used as a marker in the Fault Queue indicating that the fault clear function was performed. Fault 51 - Flt QueueCleared - No fault displayed. Used as a marker in the Fault Queue indicating that the clear queue function was performed. Fault 78 - FluxAmpsRef Rang - The value for flux amps determined by the Autotune procedure exceeds the programmed [Motor NP FLA]. Fault 13 - Ground Fault - current path to earth ground greater than 25% of drive rating. Fault 93 - Hardware Fault - Hardware enable is disabled (jumpered high) but logic pin is still low. Fault 130 - Hardware Fault - Gate array load error. Fault 131 - Hardware Fault - Dual port failure. Fault 18 - Hardware PTC - Motor PTC (Positive Temperature Coefficient) Overtemp. Fault 10 - Heatsink LowTemp - Annunciates a too low temperature case or an open NTC (heatsink temperature sensing device) circuit. Fault 8 - Heatsink OvrTemp - Heatsink temperature exceeds 100% of [Drive Temp] or is less than approximately -19 °C. Fault 12 - HW OverCurrent - The drive output current has exceeded the hardware current limit. Fault 106 - Incompat MCB-PB - Drive rating information stored on the power board is incompatible with the main control board. Fault 121 - I/O Comm Loss - I/O Board lost communications with the Main Control Board. Fault 122 - I/O Failure - I/O was detected, but failed the powerup sequence. Fault 17 - Input Phase Loss - The DC bus ripple has exceeded a preset level. Fault 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.Fault 87 - IXo VoltageRange - Voltage calculated for motor inductive impedance exceeds 25% of [Motor NP Volts]. Fault 15 - Load Loss - Drive output torque current is below [Load Loss Level] for a time period greater than [Load Loss time]. Fault 7 - Motor Overload - Internal electronic overload trip.Fault 16 - Motor Thermistor - Thermistor output is out of range. Fault 109 - NVS I/O Checksum - EEprom checksum error. Fault 110 - NVS I/O Failure - EEprom I/O error. Fault 21 - Output PhaseLoss - Current in one or more phases has been lost or remains below a preset level. Fault 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].Fault 5 - OverVoltage - DC bus voltage exceeded maximum value. Fault 100 - Parameter Chksum - The checksum read from the board does not match the checksum calculated. Fault 48 - Params Defaulted - The drive was commanded to write default values to EEPROM. Fault 38 - Phase U to Grnd - A phase to ground fault has been detected between the drive and motor in this phase. Fault 39 - Phase V to Grnd - A phase to ground fault has been detected between the drive and motor in this phase. Fault 40 - Phase W to Grnd - A phase to ground fault has been detected between the drive and motor in this phase. Fault 41 - Phase UV Short - Excessive current has been detected between these two output terminals. Fault 42 - Phase VW Short - Excessive current has been detected between these two output terminals. Fault 43 - Phase UW Short - Excessive current has been detected between these two output terminals. Fault 71 - Port 1 Adapter - The communications card has a fault. Fault 72 - Port 2 Adapter - The communications card has a fault. Fault 73 - Port 3 Adapter - The communications card has a fault. Fault 74 - Port 4 Adapter - The communications card has a fault. Fault 75 - Port 5 Adapter - The communications card has a fault. Fault 76 - Port 6 Adapter - The communications card has a fault. Fault 111 - Power Down - EEPROM data is corrupt on drive power up. Fault 3 - Power Loss - DC bus voltage remained below 85% of nominal for longer than [Power Loss Time]. Fault 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. Fault 92 - Pulse In Loss - Z Channel is selected as a pulse input and no signal is present. Fault 104 - Pwr Brd Chksum1 - The checksum read from the EEPROM does not match the checksum calculated from the EEPROM data. Fault 105 - Pwr Brd Chksum2 - The checksum read from the board does not match the checksum calculated. Fault 107 - Replaced MCB-PB - Main Control Board was replaced and parameters were not programmed. Fault 28 - See Manual - Encoderless TorqProve has been enabled but user has not read and understood application concerns of encoderless operation. Fault 63 - Shear Pin - Programmed [Current Lmt Val] has been exceeded. Fault 88 - Software Fault - Microprocessor handshake error. Fault 89 - Software Fault - Microprocessor handshake error. Fault 36 - SW OverCurrent - Drive output current has exceeded the 1ms current rating. This rating is greater than the 3 second current rating and less than the hardware overcurrent fault level. It is typically 200- 250% of the drive continuous rating. Fault 20 - TorqPrv Spd Band - Difference between [Commanded Speed] and [Encoder Speed] has exceeded the level set in [Spd Dev Band] for a time period greater than [Spd Band Integrat]. Fault 9 - Trnsistr OvrTemp - Output transistors have exceeded their maximum operating temperature. Fault 4 - UnderVoltage - DC bus voltage fell below the minimum value of 407V DC at 400/480V input or 204V DC at 200/240V input. Fault 101 - UserSet1 Chksum - The checksum read from the user set does not match the checksum calculated.Fault 102 - UserSet2 Chksum - The checksum read from the user set does not match the checksum calculated.Fault 103 - UserSet3 Chksum - The checksum read from the user set does not match the checksum calculated.If your fault can not be cleared, call 800-732-4695 for the PowerFlex 700 repair experts at Precision Electronic Services.