Cause : ACI analog signal loss comes when the analog input is lower than 4 mA (only detects analog input 4–20 mA). This warning automatically clears when the analog input signal is larger than 4 mA.

AnL warning in Delta drive indicates an Analog Input Current Loss warning. This means the drive has detected a problem with the analog current signal (typically 4-20mA) coming from an external device.

1. Tighten the terminals again.
2. Replace with a new cable.
3. Replace with a new device.
4. If the AnL error still occurs after checking all the wiring