InverterS300Verified · sol.ls-electric.com
S300 OLt — Over Load
Trip — immediate stop
CAUSE
Why does it occur?
- Motor overload failure, load exceeds set degree
- Operates when PRT-20 is set to non-zero
REMEDY · Step by step
How to fix it?
- Ensure motor and inverter have appropriate capacity
- Increase overload trip level (PRT-21)
- Check IGBT output module
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
Verified · sol.ls-electric.com
Open manual ↗S300 Standard User Manual V1.6 EN (260120)
9.5 Trip/Warning List · 14장 Troubleshooting · p.727 · V1.6 (2026-01-20)