Live zero error

What does 2 mean?

This warning/alarm appears if programmed in parameter 6-01 Live Zero Timeout Function. It indicates that the signal on one of the analog inputs is less than 50% of its programmed minimum value, typically caused by broken wiring or a faulty signal-sending device.

• Broken wire or loose connection in the analog input signal loop from the sensor to the drive (e.g., terminal AI53).
• Faulty sensor providing the analog input signal (e.g., pressure transmitter 4-20mA output below 4mA or 0V).
• Incorrect scaling in parameter P6-02 (Low Ref/Feedback) or P6-03 (High Ref/Feedback) relative to the sensor output.
• External noise or electromagnetic interference causing the analog signal to momentarily drop below the threshold.
• Parameter P6-01 (Live Zero Timeout Function) enabled with an unsuitable minimum value setting for the application.

Click steps to track your progress.

1. 1

   Verify the wiring continuity of the analog input signal from the sensor to the drive's input terminals (e.g., AI53 and AI55).

2. 2

   Measure the actual analog input signal voltage or current directly at the sensor's output terminals.

3. 3

   Measure the analog input signal voltage or current at the drive's input terminals (e.g., AI53 and AI55) and compare to the sensor output.

4. 4

   Temporarily adjust parameter P6-01 (Live Zero Timeout Function) to option [0] Disabled to confirm the fault source.

5. 5

   Check parameter P6-02 (Low Ref/Feedback) for the correct minimum signal scaling (e.g., 4mA for a 4-20mA sensor).