InverterSINAMICS G120Verified · sol.ls-electric.com
SINAMICS G120 F30027 — Precharge: timeout
Critical — power cycle required
CAUSE
Why does it occur?
DC link precharge did not complete in time — precharge resistor/contact fault
REMEDY · Step by step
How to fix it?
Measure the DC link voltage, check the precharge circuit, and consider capacitor aging
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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