Allen-Bradley 20AD014A3AYNANNN

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 safety or interlock devices connected to the auxiliary input are functioning correctly and reset the fault once the condition is cleared.

Fault Code 3

Power Loss fault. The drive detected a loss of input AC power or a significant voltage sag below the minimum threshold.
Check incoming AC supply voltage at all three phases. Inspect fuses, contactors, and supply wiring. Verify that input voltage is within the specified 400-480V AC range before restarting.

Fault Code 4

Undervoltage fault. DC bus voltage has dropped below the minimum operating level.
Measure the incoming AC supply voltage. Check for loose connections or supply interruptions. If voltage is within spec, inspect the internal DC bus capacitors and precharge circuit.

Fault Code 5

Overvoltage fault. DC bus voltage has exceeded the maximum allowable level, often caused by regenerative energy from the motor during deceleration.
Increase the deceleration time in the drive parameters. Verify that the dynamic braking resistor (if installed) is correctly sized and connected. Check the incoming supply for voltage spikes or transients.

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 overload, blocked ventilation, or bearing failure. Verify that the motor nameplate FLA is correctly programmed into the drive parameters. Reduce load or increase motor overload factor if appropriate.

Fault Code 12

HW Overcurrent fault. The output current has exceeded the hardware overcurrent trip level, indicating a short circuit or severe overload condition.
Inspect the motor and output wiring for short circuits or ground faults. Check that the motor is not mechanically seized. Verify that the drive output current rating is appropriate for the connected motor.

Fault Code 29

Analog Input Loss fault. The analog input signal (4-20 mA or 0-10V) has been lost or fallen below the minimum threshold.
Check the analog signal source and wiring to the analog input terminals. Verify that the signal source is powered and providing a valid signal. Inspect for broken wires or loose terminal connections.

Fault Code 33

Auto Restart Tries fault. The drive has exceeded the maximum number of automatic restart attempts without successfully resuming operation.
Identify and resolve the underlying fault that is causing repeated trips. Check the fault queue for the root cause fault code. Once the root cause is corrected, manually reset the drive and resume operation.