ServoMR-J4Verified · sol.ls-electric.com
MR-J4 AL.8A — USB comm time out
Alarm — operational, inspection needed· AUTO-RESET
CAUSE
Why does it occur?
MR Configurator2 USB communication was lost.
REMEDY · Step by step
How to fix it?
Check the USB cable, driver, and PC.
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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