Allen-Bradley 20F14NC104JA0NNNNN

Common Fault Codes

Fault Code 12

HW OverCurrent – The drive output current has exceeded the hardware overcurrent trip level.
Check motor and output wiring for short circuits or ground faults. Verify motor nameplate data matches drive configuration. Inspect output transistors for damage.

Fault Code 13

Ground Fault – A current path to earth ground has been detected in the output wiring or motor.
Disconnect the motor and test insulation resistance of motor windings and output cables. Replace damaged cables or motor if insulation has failed.

Fault Code 25

Decel Inhibit – The drive cannot decelerate at the programmed rate because the DC bus voltage is too high.
Increase the deceleration time in the drive parameters. If the issue persists, consider adding a dynamic braking resistor or an active front end.

Fault Code 29

Analog Input Loss – An analog input signal has fallen below the configured loss threshold (typically 2 mA on a 4-20 mA signal).
Check the analog signal source and wiring continuity. Verify the transmitter or controller providing the signal is powered and functioning correctly.

Fault Code 33

Auto Rstrt 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. Clear the fault manually and investigate the root cause before re-enabling auto restart.

Fault Code 63

SW OverCurrent – The drive output current has exceeded the software-defined overcurrent limit.
Check for mechanical overload on the motor. Verify current limit parameters are set appropriately. 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 failed output transistor or gate driver issue.
Cycle power to the drive. If the fault persists, the power module or control board may require inspection or replacement by a qualified technician.

Fault Code 100

Parameter Checksum – The drive has detected a checksum error in stored parameter data, indicating possible data corruption.
Reload parameters from a saved configuration file or reprogram the drive from scratch. If the fault recurs, the control board memory may be faulty and require replacement.