InverterS300Verification pending — cross-check with the official manual
S300 NTC Open — NTC Open
Trip — immediate stop
CAUSE
Why does it occur?
Occurs when a fault is detected in the temperature detection sensor of the power semiconductor (IGBT), or when there is a problem with the internal sensor connector.
REMEDY · Step by step
How to fix it?
- Check the ambient temperature around the inverter
- If the ambient temperature is high, check whether the inverter fan is operating normally and whether the inside of the panel is well ventilated
- If it occurs when the temperature is not high, inverter inspection is required
- Refer to the authorized automation service center information
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