InverterSINAMICS V20Verified · sol.ls-electric.com
SINAMICS V20 F12 — Inverter temp signal lost
Trip — immediate stop
CAUSE
Why does it occur?
Heatsink temperature sensor is open-circuit or has an internal fault.
REMEDY · Step by step
How to fix it?
Power-cycle the unit; if it recurs, repair or replace the inverter.
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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