Allen-Bradley 20G1ANC260JN0NNNNN

Common Fault Codes

Fault Code 12

HW OverCurrent – The drive output current has exceeded the hardware overcurrent trip threshold.
Check motor and wiring for short circuits or ground faults. Verify motor load is within drive rating. Inspect output power devices for damage.

Fault Code 13

Ground Fault – A ground fault has been detected on the drive output.
Disconnect the motor and test insulation resistance of motor windings and output cables. Replace damaged cables or motor if insulation has failed.

Fault Code 3

Power Loss – DC bus voltage dropped below the minimum threshold during operation.
Check input supply voltage for sags or interruptions. Verify input fuses and contactor operation. Inspect incoming power quality.

Fault Code 4

UnderVoltage – DC bus voltage is below the minimum operating level.
Verify that input line voltage is within specification. Check for loose connections on input terminals. Inspect pre-charge circuit and DC bus capacitors.

Fault Code 5

OverVoltage – DC bus voltage has exceeded the maximum allowable level, typically caused by regenerative energy from the load.
Check for excessive deceleration rates and increase decel time. Verify dynamic braking resistor installation if fitted. Check input line voltage for overvoltage conditions.

Fault Code 7

Motor Overload – The drive's electronic overload protection has tripped due to sustained overcurrent to the motor.
Check motor load for mechanical binding or overloading. Verify motor nameplate data is correctly programmed in the drive. Allow motor to cool before restarting.

Fault Code 33

Auto Restart Tries – The drive has exceeded the maximum number of automatic restart attempts following a fault.
Identify and resolve the underlying fault that triggered the restart attempts. Clear the fault manually and investigate root cause before re-enabling auto restart.

Fault Code 81

Comm Loss – Loss of communication detected on the active communication adapter or embedded network port.
Check EtherNet/IP or other network cable connections and switch/hub status. Verify PLC scanner configuration and network timeout settings. Replace communication adapter if hardware fault is confirmed.