Drives (VFDs)
Allen-Bradley PowerFlex 4M VFD fault codes
What all 15 Allen-Bradley PowerFlex 4M VFD fault codes mean, in plain words, with a risk grade for each. These come from the manufacturer's own manual. The fix for each one is in WERCS Diagnose.
Get the fixes · plans from $49/moUpdated July 22, 2026
| Code | What it means | Risk |
|---|---|---|
| F003 | F003 Power Loss The drive stopped because it detected excessive voltage ripple from a lost incoming power phase. | YELLOW |
| F004 | F004 UnderVoltage The drive shut down because its internal voltage fell below the minimum required operating level. | YELLOW |
| F005 | F005 OverVoltage The drive stopped the motor because its internal voltage exceeded the maximum safe value. | YELLOW |
| F006 | F006 Motor Stalled The drive stopped because it was unable to accelerate the motor without exceeding its current limit. | YELLOW |
| F007 | F007 Motor Overload The drive stopped the motor because an excessive load triggered the internal electronic overload protection. | YELLOW |
| F008 | F008 Heatsink OvrTmp The drive stopped because its internal heatsink temperature exceeded the maximum allowed value. | YELLOW |
| F012 | F012 HW OverCurrent The drive shut down because the output current exceeded the internal hardware limit. | YELLOW |
| F013 | F013 Ground Fault The drive stopped the motor because it detected a current path to earth ground at the output terminals. | RED |
| F038 | F038 Phase U to Gnd The drive shut down because it detected a phase to ground fault on the U phase going to the motor. | RED |
| F041 | F041 Phase UV Short The drive stopped because it detected excessive current from a short circuit between the U and V output terminals. | RED |
| F063 | F063 SW OverCurrent The drive stopped the motor because the output current exceeded the programmed software trip limit. | YELLOW |
| F064 | F064 Drive Overload The drive stopped because the motor load exceeded the maximum time and current ratings of the drive. | YELLOW |
| F070 | F070 Power Unit The drive stopped operating because it detected a failure in its internal power section. | YELLOW |
| F081 | F081 Comm Loss The drive stopped because the communication port lost its connection to the control network. | YELLOW |
| F100 | F100 Parameter Checksum The calculated parameter checksum does not match the board checksum, which stops the drive from operating. | YELLOW |
Every code comes from the manufacturer's own manual. Subscribers see which manual and page.