71

Brake control

Kone · CMXC-022 Frequency Control Upgrade Kit

What does 71 mean?

An error has been detected within the brake control circuit of the R&M Materials Handling Frequency Converter, indicating a malfunction that could prevent the brake from engaging or disengaging properly. This poses a significant safety risk, especially in hoist applications.

Common Causes

  • Error detected in the brake control circuit

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check and repair the brake control circuit wiring

  2. 2

    Measure the brake coil resistance and compare to specifications

  3. 3

    Replace the brake if its resistance is outside specifications

  4. 4

    If the problem recurs, replace the inverter

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Verified technical data. Last updated: March 2026

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Source: Kone CMXC-022 Frequency Control Upgrade Kit