000

RSL Parity Error Count

Otis · GAA21750AK3 Service Tool

What does 000 mean?

This code indicates that parity errors have been detected and counted on the Remote Serial Link (RSL) during the RS test. The '000' value suggests that the counter has registered parity errors, which can affect the integrity of communication with remote stations interacting with the LCB_II.

Common Causes

  • Data corruption during RSL transmission, often due to electrical interference, damaged cabling, or a faulty RSL module.
  • Incorrect RSL wiring or termination.
  • High noise environment impacting data signals on the RSL bus.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Inspect RSL cabling for damage or loose connections, ensuring proper shielding is maintained.

  2. 2

    Verify RSL termination settings at all remote stations are correct (e.g., matching the specified resistance).

  3. 3

    Check for sources of electrical noise in the vicinity of the RSL communication lines.

  4. 4

    Replace the RSL module if errors persist after checking wiring and environment.

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Verified technical data. Last updated: March 2026

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Source: Otis GAA21750AK3 Service Tool