Allen-Bradley 20BD014A0AYNANC0

Common Fault Codes

Fault Code 2

Auxiliary Input fault. The auxiliary input interlock has opened, indicating an external fault condition has been triggered.
Check the wiring and status of the auxiliary input terminals. Verify that any external interlock devices (e.g., thermal switches, safety relays) connected to the auxiliary input are functioning correctly and reset the fault once the condition is cleared.

Fault Code 3

Power Loss fault. DC bus voltage dropped below the minimum threshold during operation, typically caused by an input power interruption.
Check incoming AC supply voltage for sags, phase loss, or interruptions. Verify input fusing and connections. If power quality is poor, consider adding a line reactor or UPS.

Fault Code 4

Undervoltage fault. The DC bus voltage has fallen below the undervoltage trip level during normal operation.
Measure and verify that the incoming AC line voltage is within the specified range (400-480V AC). Check for loose connections, blown fuses, or a failing input power source.

Fault Code 5

Overvoltage fault. The DC bus voltage has exceeded the overvoltage trip threshold, often caused by regenerative energy from a decelerating load.
Increase the deceleration time in the drive parameters. If the load is highly regenerative, consider adding a dynamic braking resistor or an active front end. Check incoming line voltage for overvoltage conditions.

Fault Code 7

Motor Overload fault. The drive's electronic overload protection has detected that the motor has been operating above its rated current for an extended period.
Check the motor for mechanical overloading, blocked ventilation, or bearing failure. Verify that the motor nameplate current is correctly programmed into the drive overload parameters. Reduce load or increase motor size if necessary.

Fault Code 12

HW OverCurrent fault. The output current has exceeded the hardware overcurrent trip level, indicating a short circuit, ground fault, or severe overload condition.
Disconnect the motor and check motor wiring for short circuits or ground faults. Verify that the motor is not mechanically seized. Check drive output transistors for damage. Do not restart until the root cause is identified.

Fault Code 13

Ground Fault. A current path to earth ground has been detected on the drive output, indicating insulation breakdown in the motor or output cabling.
Disconnect the motor cables and test insulation resistance of the motor windings and output cables to ground using a megohmmeter. Replace damaged cables or motor windings as required.

Fault Code 33

Auto Restart Tries fault. The drive has attempted to automatically restart after a fault the maximum number of times without successfully clearing the fault condition.
Investigate and resolve the underlying fault that triggered the auto-restart attempts. Review the fault queue log in the drive to identify the original fault code. Correct the root cause before manually resetting and restarting the drive.