Allen-Bradley 20AD011C3AYNANC0

Common Fault Codes

Fault Code 2

Auxiliary Input fault. The auxiliary input interlock has opened, disabling the drive.
Check the wiring and status of the auxiliary input terminals. Verify that any external interlock devices connected to the auxiliary input are closed and functioning correctly.

Fault Code 3

Power Loss fault. Input power to the drive was lost or dropped below the acceptable threshold.
Check incoming AC supply voltage at all three input phases. Verify fuses, contactors, and supply wiring. Confirm voltage is within the 400-480V rated range.

Fault Code 4

Undervoltage fault. DC bus voltage has dropped below the minimum operating level.
Measure the incoming supply voltage. Check for voltage sags or phase loss. Inspect input fuses and line reactor if installed.

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 decel time. Verify supply voltage is not above specification. Consider adding a dynamic braking resistor if regenerative loads are present.

Fault Code 7

Motor Overload fault. The drive's electronic overload function has detected sustained overcurrent conditions indicating motor overheating.
Check motor load for mechanical binding or overloading. Verify motor overload parameters are set correctly for the connected motor nameplate data. Allow motor to cool before restarting.

Fault Code 12

HW OverCurrent fault. Output current has exceeded the drive's hardware overcurrent trip threshold.
Check for short circuits in the motor cable or motor windings. Verify motor is not mechanically jammed. Check that motor cable length does not exceed specifications without an output reactor.

Fault Code 25

Drive Overtemperature fault. The drive's internal heatsink temperature has exceeded the allowable limit.
Check that ambient temperature is within the 0-50 degrees C operating range. Verify that cooling fans are operating and that ventilation clearances around the drive are maintained. Clean any dust from heatsink fins.

Fault Code 33

Auto Restart Attempts fault. The drive has exceeded the maximum number of automatic restart attempts without successfully running.
Identify and resolve the underlying fault that is causing repeated trips before re-enabling auto restart. Review the fault queue log to determine the root cause fault code.