MR-JE AL.1E (Encoder Initial Communication Error 2) — cause?

Encoder hardware malfunction during initial power-on communication. Unlike AL.16 (which includes cable and amplifier faults), AL.1E specifically indicates encoder hardware failure (sub-code 1E.1: Encoder malfunction).

MR-JE AL.1E — how to fix?

Replace the servo motor (which contains the encoder) and check if the alarm is eliminated. Investigate and eliminate nearby noise, abnormal ambient temperature, or vibration. If fault remains after motor replacement, replace the servo amplifier.

ServoMR-JEVerification pending — cross-check with the official manual

MR-JE AL.1E — Encoder Initial Communication Error 2

Trip — immediate stop

CAUSE

Why does it occur?

Encoder hardware malfunction during initial power-on communication
Unlike AL.16 (which includes cable and amplifier faults), AL.1E specifically indicates encoder hardware failure (sub-code 1E.1: Encoder malfunction)

REMEDY · Step by step

How to fix it?

Replace the servo motor (which contains the encoder) and check if the alarm is eliminated
Investigate and eliminate nearby noise, abnormal ambient temperature, or vibration
If fault remains after motor replacement, replace the servo amplifier

Do not reset repeatedly before identifying the cause. Repeated resets while ignoring a trip/alarm can cause secondary damage (IGBT failure, motor winding damage, etc.).

SOURCE

Related manual page

Summary based on the official Mitsubishi Electric manual. For accurate and complete information, always consult the official manual.

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MR-JE AL.1E — Encoder Initial Communication Error 2

Why does it occur?

How to fix it?

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