Cause: NTC wire break error comes when a wire break is found in the NTC thermistor detection circuit. An NTC thermistor's resistance decreases as its temperature increases. A "wire break" suggests an open circuit.

nrb fault in fuji FRENIC MEGA drive indicates NTC wire break error. This means the NTC (Negative Temperature Coefficient) thermistor input circuit has detected an open or disconnected wire.

• Check whether the motor cable is broken.
• Measure the temperature around the motor.
• Measure the resistance of the NTC thermistor.