50
Analogue Input Current Low
Vacon · NX Liquid-Cooled Drive
What does 50 mean?
The current at the analogue input, which is configured for a 4 to 20mA signal range, has dropped below 4mA. This fault is commonly caused by a broken or loose control cable in the current loop or a failure of the signal source providing the analogue input.
Common Causes
- Analogue input current reading is below the configured minimum (P0822).
- Faulty current sensor or transducer.
- Open circuit in the current input loop.
Repair Steps & Checklist
Click steps to track your progress.
- 1
Check the entire current loop circuitry, including the analogue signal source, control cabling, and connections at the analogue input terminal, for breaks or loose wires.
- 2
Measure the current output from the analogue signal source to confirm it is providing at least 4mA.
Verified technical data. Last updated: March 2026
Related Faults
Source: Vacon NX Liquid-Cooled Drive