ServoMR-J4Verification pending — cross-check with the official manual
MR-J4 AL.91 — Servo amplifier overheat warning
Trip — immediate stop
CAUSE
Why does it occur?
- - The temperature inside of the servo amplifier reached a warning level. Detail No. Detail name Cause Check method Check result Action Target 91.1 Main circuit device overheat warning (
- Ambient temperature of the servo amplifier has exceeded 55 . Check the ambient temperature. It is over 55 . Lower the ambient temperature. [A] [B] [WB] [RJ010] [GF] It is less than 55 . Check (2). (
- The clos
REMEDY · Step by step
How to fix it?
Review the operation pattern and load conditions.
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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