Allen Bradley PowerFlex 70 AC Drive

How to troubleshoot Allen-Bradley PowerFlex Drives

Commons Issues with Allen-Bradley PowerFlex Drives

Troubleshooting a faulted drive can be a tough endeavour. We’re here to help! The list below features some of the most common reasons why Allen-Bradley PowerFlex drives can fault and how to solve those issues. If you’ve tried all of the tips below and there’s still an problem with your drive, it might be time to contact your service provider for a repair or replacement. Contact us today for support!

Allen Bradley PowerFlex 70 AC Drive

Problems and Solutions for Allen-Bradley PowerFlex Drives

Disconnect power and remove contamination (metal shavings, dust) with compressed dry air. The Allen-Bradley Powerflex drive should be sent in for service if it’s soaked with oil or other liquid contaminants.
Loose connections
Electronics are limited to their wiring. Vibrations, physical manipulation or relocation may loosen terminal connections. Verify and secure all terminal connections.
Missing power phase
Check input voltage and verify power is on all phases.
Bad cables
Over time and after constant use, cables will wear out from physical damage and contamination. If you have haven’t swapped out your cables in a while, secure a new cable and try again.
Seized cooling fans
Overheating is the biggest enemy to electronic circuitry. Proper ventialtion requires that fans have been cleaned and devoid of any debris.
Wrong parameters
This issue can occur when system memory leaks due to voltage transients and the values change. Backup the parameters using the HIM and reset the drive to factory default, then restore the correct parameters.
Binded load
This will usually cause an overcurrent fault. Check gear, fans, pulleys or worm gears for proper operation.

Allen-Bradley PowerFlex Drives

Alarm Numbers and Descriptions

  • 2 Auxiliary Input
  • 3 Power Loss
  • 4 Under Voltage
  • 5 Over Voltage
  • 7 Motor Overload
  • 8 Heatsink Over Temp
  • 9 Transister Over Temp
  • 12 HW Over Current
  • 15 Load Loss
  • 16 Motor Thermistor
  • 17 Input Phase Loss
  • 24 Decel Inhibit
  • 25 Over Speed Limit
  • 29 Analog In Loss
  • 33 Auto Restart Tries
  • 36 SW Over Current
  • 38 Phase U to Ground
  • 39 Phase V to Ground
  • 40 Phase W to Ground
  • 41 Phase UV Short
  • 42 Phase UW Short
  • 43 Phase VU Short
  • 48 Params Defaulted
  • 49 Drive Powerup
  • 51 Fault Queue Cleared
  • 52 Faults Cleared
  • 63 Shear Pin
  • 64 Drive Overload
  • 71-75 Port 1-5 Adapter
  • 77 IR Volts Range
  • 78 Flux Amps Reference Range
  • 79 Excessive Load
  • 80 AutoTune Aborted
  • 81-85 Port 1-5 DPI Loss
  • 87 IXo Voltage Range
  • 91 Encoder Loss
  • 100 Parameter Checksum
  • 101 User Set 1 Checksum
  • 102 User Set 2 Checksum
  • 103 User Set 3 Checksum
  • 104 Power Board Checksum 1
  • 105 Power Board Checksum 2
  • 106 Incompatible MCB-PB
  • 107 Replaced MCB-PB
  • 108 Analog Calibration Checksum
  • 111 Enable Hardware

*ICR Services is not an authorized Rockwell Automation distributor or repair company in any way affiliated with Rockwell Automation. is not an authorized distributor, affiliate, or representative for the listed manufacturers unless explicitly stated otherwise. Designated trademarks, brand names and brands appearing herein are the property of their respective owners.

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