PLCS7-1200Verified · sol.ls-electric.com
S7-1200 LED-MAINT — MAINT LED yellow
Alarm — operational, inspection needed
CAUSE
Why does it occur?
Maintenance notification from a module — battery, diagnostic alarm, low memory card capacity, etc.
REMEDY · Step by step
How to fix it?
Check the maintenance entry in the diagnostic buffer, then replace/service the affected part.
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 Siemens AG manual. For accurate and complete information, always consult the official manual.
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