Allen-Bradley 20AD022A3AYNANC0

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 an input phase loss condition.
Check incoming AC supply voltage on all three phases. Verify fuses, circuit breakers, and input wiring. Restore proper input power and reset the fault.

Fault Code 4

Undervoltage fault. DC bus voltage has dropped below the minimum acceptable threshold.
Measure input line voltage and verify it is within the specified range (342-528V AC). Check for voltage sags or supply issues and correct before resetting.

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 parameter, install or verify a dynamic braking resistor, or enable the overvoltage control feature. Reset the fault after corrective action.

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 load for mechanical binding or excessive load. Verify motor overload parameters are set correctly for the connected motor. Reduce load or adjust overload settings as appropriate.

Fault Code 12

HW Overcurrent fault. The output current has exceeded the hardware overcurrent trip level, indicating a possible short circuit or severe overload at the drive output.
Check motor and output wiring for short circuits or ground faults. Verify the motor is not mechanically jammed. Inspect output power devices and reset after resolving the cause.

Fault Code 13

Ground Fault. A ground fault has been detected in the output wiring or motor windings.
Disconnect the motor and measure insulation resistance of the motor and output cables to ground. Replace damaged cables or motor if insulation has failed. Reset the fault after repair.

Fault Code 33

Auto Restart Tries fault. The drive has exceeded the maximum number of automatic restart attempts without successfully running.
Investigate the root cause of the repeated faults that triggered the auto-restart attempts. Correct the underlying fault condition, then manually reset the drive.