Allen-Bradley 20AC030C3AYNANC0

Common Fault Codes

Fault Code 2

Auxiliary input fault. The auxiliary input interlock has opened, interrupting drive operation.
Check the auxiliary input wiring and the status of any external interlock devices connected to the drive. Close the interlock circuit before resetting the fault.

Fault Code 3

Power loss fault. Input power to the drive was lost or dropped below the acceptable threshold during operation.
Verify input supply voltage at all three phases. Check for blown fuses, tripped breakers, or loose connections on the input power terminals.

Fault Code 4

Undervoltage fault. DC bus voltage has dropped below the minimum operating level.
Check input line voltage for sags or interruptions. Verify that the supply transformer is adequately sized for the load. Inspect input fuses and connections.

Fault Code 5

Overvoltage fault. DC bus voltage has exceeded the maximum allowable level, typically caused by regenerative energy from the motor.
Check for excessive deceleration rates and increase the deceleration time. Verify that a dynamic braking resistor is installed and correctly sized if required by the application.

Fault Code 6

Motor stall fault. The drive has detected that the motor is stalled or unable to accelerate to the commanded speed within the allowed time.
Check for mechanical obstructions on the driven load. Verify motor and drive sizing. Adjust stall fault timeout parameters if the application requires extended acceleration times.

Fault Code 7

Motor overload fault. The drive's electronic overload protection has tripped due to sustained overcurrent condition at the motor.
Check the motor for overloading, blocked ventilation, or excessive ambient temperature. Verify motor FLA parameter settings in the drive match the motor nameplate. Allow the motor to cool before resetting.

Fault Code 12

Hardware overcurrent fault. Output current has exceeded the drive's hardware overcurrent trip level.
Check for a short circuit or ground fault in the motor cable or motor windings. Inspect output wiring insulation. Verify that the motor is not mechanically seized.

Fault Code 29

Analog input loss fault. The analog reference signal has been lost or fallen below the configured minimum threshold.
Check the analog input wiring for open circuits or poor connections. Verify the signal source is active and within the configured range. Review the analog input loss action parameter settings.