Allen-Bradley 20F11RC8P7JA0NNNNN

Common Fault Codes

Fault Code 12

HW OverCurrent – The output current has exceeded the hardware overcurrent trip threshold, indicating a possible short circuit or excessive load on the motor output.
Check motor wiring for short circuits or ground faults. Verify motor and cable insulation resistance. Inspect load for mechanical jams or excessive friction. Reduce acceleration rate if load inertia is high.

Fault Code 13

Ground Fault – A ground fault has been detected on the drive output, indicating current leakage to earth from the motor cable or motor windings.
Disconnect the motor and cables and perform insulation resistance testing. Inspect motor cable shielding and terminations. Replace damaged cables or motor if insulation failure is confirmed.

Fault Code 25

Decel Inhibit – The drive is unable to decelerate at the programmed rate because the DC bus voltage has risen above the overvoltage threshold, typically caused by regenerative energy from the load.
Increase the deceleration time in the drive parameters. Consider adding a dynamic braking resistor or active front end to absorb regenerative energy. Check for high-inertia loads.

Fault Code 29

Analog Input Loss – The analog input signal has fallen below the configured minimum threshold, indicating a broken wire, failed sensor, or signal source fault.
Check the analog input wiring and signal source. Verify the signal level at the drive terminals. Configure the analog input loss action parameter to suit the application requirements.

Fault Code 33

Auto Restart Tries – The drive has exceeded the maximum number of automatic restart attempts following a fault condition, indicating a persistent fault that has not cleared.
Identify and resolve the underlying fault that triggered the restart attempts. Review the fault queue log in the drive. Increase the auto restart delay or reduce the number of retry attempts if appropriate.

Fault Code 63

SW OverCurrent – A software-level overcurrent condition has been detected, where the output current has exceeded the programmed software overcurrent limit.
Verify motor nameplate data and confirm drive parameters match the motor ratings. Check for mechanical overload conditions on the driven equipment. Inspect motor and cabling for faults.

Fault Code 70

Power Unit – An internal power structure fault has been detected, which may indicate a failed IGBT, gate driver fault, or internal hardware failure within the drive power section.
Cycle power to the drive and observe if the fault clears. If the fault persists, the drive power section may require inspection or replacement. Contact a qualified repair facility for internal component evaluation.

Fault Code 100

Parameter Checksum – A checksum error has been detected in the drive parameter memory, indicating possible data corruption in the non-volatile memory.
Perform a factory reset and re-enter all application parameters. If the fault recurs, the drive control board memory may be faulty and the unit may require repair or replacement.