Allen-Bradley 20G11GD011JA0NNNNN

Common Fault Codes

Fault 12

HW OverCurrent – The drive output current has exceeded the hardware overcurrent trip threshold.
Check for a short circuit on the motor cables or motor windings. Verify motor nameplate data matches drive programming. Inspect output wiring for insulation damage.

Fault 13

Ground Fault – Excessive current is flowing to ground, indicating an insulation breakdown or wiring fault.
Disconnect the motor and test insulation resistance with a megohmmeter. Inspect cable routing for damage. Replace motor or cables if insulation resistance is below specification.

Fault 29

Analog Input Loss – An analog input configured for a 4–20 mA signal has dropped below the minimum threshold (typically below 2 mA), indicating a broken wire or failed transmitter.
Check wiring continuity on the analog input circuit. Verify the signal source device is powered and functioning. Confirm parameter settings for analog input loss action.

Fault 33

Auto Restart Tries – The drive has attempted to automatically restart the configured number of times following a fault without successfully clearing the fault condition.
Identify and resolve the underlying fault that triggered the auto-restart attempts. Review fault queue history. Increase restart delay or reduce number of retry attempts if nuisance tripping occurs.

Fault 63

SW OverCurrent – Software-detected overcurrent condition; output current has exceeded the programmed software overcurrent limit.
Verify motor load is within rated capacity. Check for mechanical overload or binding in the driven equipment. Review current limit parameter settings and adjust if necessary.

Fault 70

Power Unit – An internal power structure fault has been detected, which may indicate a damaged IGBT, gate driver fault, or internal hardware failure.
Cycle power and observe if fault recurs. If persistent, inspect the drive power section for visible damage. The drive may require professional repair or replacement of the power module.

Fault 100

Parameter Checksum – The drive has detected a checksum error in stored parameter data, indicating possible memory corruption.
Perform a factory reset and reload the application parameter set from a backup. If the fault persists after reset, the control board may require replacement.

Fault 122

I/O Board Fail – Communication between the main control board and an installed I/O option module has been lost or has failed.
Power down the drive and reseat the I/O option module in its bay. Inspect the module connector for damage or contamination. Replace the I/O option module if the fault persists.