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ErrorLib — Industrial Fault Code Library

Disclaimer: ErrorLib is an independent technical reference tool. While we aim for accuracy, always verify with the manufacturer’s official service manuals before performing maintenance on industrial equipment. ErrorLib is not affiliated with the brands listed.

8

System Fault

Vacon · NX Liquid-Cooled Drive

What does 8 mean?

A general system malfunction has occurred, typically indicating a component failure or faulty internal operation. Detailed subcodes in T.14 provide insight into the specific area of failure, including feedback issues (S1, S6), ASIC trip (S4), VaconBus disturbance (S5), power unit problems (S8-S11), or expander/option board issues (S12, S30-S48).

Common Causes

  • Internal hardware fault detected by self-diagnostics.
  • Firmware corruption or error.
  • Failure in critical control components.
  • Power supply instability.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Reset the fault and attempt to restart the drive.

  2. 2

    Note down any fault data recorded in menu T.1-T.13, especially the subcode in T.14, for detailed diagnostic analysis.

Browse all codes in this manual (52)
Verified technical data. Last updated: April 2026

Related Faults

1Overcurrent10Input Phase Failure12Brake Chopper Supervision Fault
Source: Vacon NX Liquid-Cooled Drive
Open Manual (Page 152)Search more codes in this manual