PLCFX5UVerified · sol.ls-electric.com
FX5U LED-ERR-RED — ERR LED red
Critical — power cycle required
CAUSE
Why does it occur?
Fatal self-diagnostic fault or STOP-state error
REMEDY · Step by step
How to fix it?
Collect the codes via GX Works3 diagnostics, then take action per each code
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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