ServoMR-J4Verified · sol.ls-electric.com
MR-J4 AL.12 — Memory error 1 (RAM)
Critical — power cycle required
CAUSE
Why does it occur?
Internal RAM self-diagnostic fault
REMEDY · Step by step
How to fix it?
Cycle the power; if it recurs, replace the assembly
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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