Allen-Bradley 20F14NC302JA0NNNNN

Common Fault Codes

Fault Code 2

Auxiliary Input fault. A digital input configured as an auxiliary input has opened, indicating an external fault condition.
Check the external device or circuit connected to the auxiliary input. Verify wiring continuity and that the external device is operating correctly before clearing the fault and restarting.

Fault Code 3

Power Loss fault. DC bus voltage dropped below the minimum threshold during operation, indicating an input power interruption.
Check incoming AC supply voltage for sags or interruptions. Inspect input fuses, contactors, and supply wiring. Verify that the supply capacity is adequate for the drive load.

Fault Code 4

Undervoltage fault. DC bus voltage is below the minimum operating level, typically caused by low input line voltage.
Measure input line voltage at the drive terminals. Ensure the supply voltage is within the specified range (342-528V AC). Check for loose connections or supply issues upstream.

Fault Code 5

Overvoltage fault. DC bus voltage has exceeded the maximum allowable level, often caused by regenerative energy from a decelerating load.
Increase deceleration time to reduce regenerative energy. Consider adding a dynamic braking resistor or a regenerative braking unit. Check for overvoltage on the incoming supply.

Fault Code 7

Motor Overload fault. The drive's electronic overload protection has detected sustained overcurrent conditions indicating the motor is overloaded.
Reduce the mechanical load on the motor. Verify motor nameplate data is correctly programmed in the drive parameters. Check for mechanical binding or excessive friction in the driven equipment.

Fault Code 12

HW Overcurrent fault. Output current has exceeded the hardware overcurrent trip level, indicating a short circuit, ground fault, or severe overload.
Check motor and output wiring for short circuits or ground faults. Inspect the motor windings for insulation breakdown. Verify that the drive rating is appropriate for the connected motor.

Fault Code 13

Ground Fault. Excessive current is flowing to ground on the output side of the drive, indicating insulation failure in the motor or output cabling.
Disconnect the motor and measure insulation resistance of the motor windings and output cables to ground. Replace damaged cables or motor if insulation resistance is below acceptable limits.

Fault Code 33

Auto Restart Tries fault. The drive has exceeded the maximum number of automatic restart attempts without successfully running.
Identify and resolve the underlying fault that is causing repeated trips before re-enabling the drive. Review the fault queue log in the drive parameters to determine the root cause fault code.