Allen-Bradley 20F11FC072JA0NNNNN

Common Fault Codes

Fault 12

HW OverCurrent – The drive output current has exceeded the hardware overcurrent trip threshold.
Check for a short circuit or ground fault on the motor cables. Verify motor insulation resistance. Inspect for mechanical overload on the driven equipment. Reduce acceleration rate if the fault occurs during ramp-up.

Fault 13

Ground Fault – A current path to earth ground has been detected at the drive output.
Disconnect the motor and cables and perform an insulation resistance test. Check motor winding insulation and cable shielding. Repair or replace damaged cables or motor windings.

Fault 25

Decel Inhibit – The drive is unable to decelerate within the programmed deceleration time due to excessive bus voltage.
Increase the deceleration time parameter. If the application requires fast deceleration, install a dynamic braking resistor or enable the bus voltage regulation feature.

Fault 29

Analog Input Loss – The analog input signal has fallen below the configured loss threshold (typically below 1 mA on a 4-20 mA signal).
Check the wiring and signal source connected to the analog input. Verify the signal level at the terminal strip. Configure the analog input loss action parameter to suit the application requirements.

Fault 33

Auto Restart Tries – The drive has exceeded the maximum number of automatic restart attempts following a fault.
Identify and resolve the underlying fault that triggered the restart attempts. Review the fault queue for the root cause fault code. Adjust the auto restart parameters if the application requires more restart attempts.

Fault 63

SW OverCurrent – The output current has exceeded the software-defined overcurrent limit.
Check for mechanical overload on the motor. Verify motor nameplate data is correctly programmed into the drive. Inspect motor and cable connections for faults. Adjust current limit parameters if appropriate for the application.

Fault 70

Power Unit – An internal power structure fault has been detected, which may indicate a damaged IGBT or gate driver circuit.
Cycle power to the drive. If the fault persists, the drive power structure may require inspection or replacement. Contact a qualified service technician to evaluate the internal power components.

Fault 100

Parameter Checksum – A checksum error has been detected in the drive parameter memory, indicating possible data corruption.
Restore parameters from a saved backup if available. Perform a factory reset and re-enter all parameters manually. If the fault recurs, the control board memory may be faulty and require replacement.