PLCFX5UVerified · sol.ls-electric.com
FX5U LED-BAT — BAT LED on
Warning — monitor
CAUSE
Why does it occur?
Low backup battery charge warning
REMEDY · Step by step
How to fix it?
Replace the battery as described in the service manual
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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