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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.

64

Relay

Kone · CMXC-022 Frequency Control Upgrade Kit

What does 64 mean?

An error has been detected in the ROB1 relay, its test circuit, or the main contactor within the R&M Materials Handling Frequency Converter. This indicates a problem with the control or power switching components, preventing the drive from safely controlling motor power.

Common Causes

  • Error detected in the ROB1 relay
  • Error detected in the ROB1 test circuit
  • Error detected in the main contactor

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check the main contactor circuit wiring connections

  2. 2

    If the problem recurs, replace the inverter

Browse all codes in this manual (40)
Verified technical data. Last updated: April 2026

Related Faults

1Overcurrent13Under temperature14Overtemperature
Source: Kone CMXC-022 Frequency Control Upgrade Kit
Open Manual (Page 53)Search more codes in this manual