Allen-Bradley 20F1ANE063AN0NNNNN

Common Fault Codes

Fault Code 2

Auxiliary input fault. An external fault signal has been received through the auxiliary input terminal or logic.
Check the wiring and status of the auxiliary input. Verify that any external interlock or safety device connected to the auxiliary input is in the correct state before resetting the fault.

Fault Code 3

Power loss fault. The drive detected a loss of input AC power or an undervoltage condition on the DC bus.
Check incoming AC supply voltage at all three phases. Verify that line voltage is within the specified range and that fuses and contactors upstream are intact.

Fault Code 4

Undervoltage fault. DC bus voltage has dropped below the minimum threshold during operation.
Inspect input supply for voltage sags or phase loss. Check for loose connections on the input terminals and verify the supply transformer capacity is adequate for the load.

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 parameter. If regenerative loads are present, consider adding a dynamic braking resistor or an active front end.

Fault Code 7

Motor overload fault. The drive's electronic overload protection has detected sustained overcurrent conditions indicating the motor is thermally overloaded.
Verify motor load conditions and compare with motor nameplate ratings. Check that motor overload parameters in the drive are correctly configured. Inspect the mechanical load for binding or excessive friction.

Fault Code 12

Hardware overcurrent fault. Output current has exceeded the hardware current limit of the drive, indicating a short circuit or severe overload condition.
Disconnect the motor and check output wiring for phase-to-phase or phase-to-ground short circuits. Inspect the motor windings for insulation failure. If wiring is intact, the drive power section may require inspection or replacement.

Fault Code 25

Drive overtemperature fault. The heatsink or internal temperature sensor has detected a temperature above the allowable limit.
Check that cooling fans are operational and that airflow through the drive enclosure is unobstructed. Verify ambient temperature is within specification. Clean heatsink fins if dust accumulation is present.

Fault Code 81

Communication loss fault. The drive has lost communication with the host controller or communication adapter module.
Check the communication cable connections and the seating of the communication adapter module. Verify network configuration parameters and that the controller is actively scanning the drive. Check for network faults or duplicate node addresses.