InverterS300Verified · sol.ls-electric.com
S300 Lost Option Comm — Lost Option Comm
Trip — immediate stop
CAUSE
Why does it occur?
A trip signal generated when there is a fault in the communication of the communication option board.
REMEDY · Step by step
How to fix it?
- Turn off the power, remove the communication option card, reinstall it, and turn the power on
- If the same trip recurs, inspection of the communication option card or the inverter contact area is required
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.731 · V1.6 (2026-01-20)