Allen-Bradley 20G11FD022AA0NNNNN

Common Fault Codes

Fault Code 12

HW OverCurrent – The drive output current has exceeded the hardware overcurrent trip threshold.
Check motor and wiring for short circuits or ground faults. Verify motor load is within drive rating. Inspect output power wiring and motor insulation resistance.

Fault Code 13

Ground Fault – A current path to earth ground has been detected in the output power wiring or motor.
Disconnect motor and test insulation resistance with a megohmmeter. Inspect output cables for damaged insulation. Check motor windings for ground fault.

Fault Code 25

Decel Inhibit – The drive is unable to decelerate because the DC bus voltage is too high, typically caused by regenerative energy from the load.
Increase deceleration time in parameters. Install a dynamic braking resistor or regenerative unit. Check if load inertia is too high for the configured decel ramp.

Fault Code 29

Analog Input Loss – An analog input configured for a 4-20 mA signal has dropped below the minimum threshold, indicating a broken wire or signal loss.
Check analog input wiring and signal source. Verify the transmitter or controller providing the signal is functioning. Inspect terminal connections at the drive I/O terminal block.

Fault Code 33

Auto Restart Tries – The drive has exceeded the maximum number of automatic restart attempts after a fault.
Identify and resolve the underlying fault that triggered the restart attempts. Review fault queue history via the HIM. Adjust auto-restart parameters if appropriate for the application.

Fault Code 63

SW OverCurrent – Software-detected overcurrent condition; output current has exceeded the programmed software overcurrent limit.
Check for mechanical overload on the motor. Verify current limit parameters are set correctly. Inspect motor and driven equipment for binding or excessive load.

Fault Code 70

Power Unit – An internal power structure fault has been detected, which may indicate a damaged IGBT, gate driver, or power board.
Cycle power and attempt to clear the fault. If fault persists, inspect the power module for visible damage. The drive may require professional repair or power module replacement.

Fault Code 100

Parameter Checksum – A checksum error has been detected in the drive parameter memory, indicating possible data corruption.
Restore parameters from a saved backup using Connected Components Workbench or DriveExplorer. If no backup is available, reset to factory defaults and reprogram. Replace the drive control board if the fault recurs.