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E. 1 fault error code in Mitsubishi FR-XC drive

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Cause : Option fault comes when the converter output is shut off when a contact failure occurs between the converter and the communication option.

Appears when the switch for manufacturer setting on the communication option is changed.

• Check that the communication option is plugged into the connector securely.
• Check for excess electrical noises generated around the converter.
• Check that the initial position of the switch for manufacturer setting was not changed.

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