InverterS300Verification pending — cross-check with the official manual
S300 Main Cap Diag Fail — Main Cap Diag Fail
Trip — immediate stop
CAUSE
Why does it occur?
Occurs during the main capacitor diagnosis function when the current input voltage is lower than the voltage required to perform the diagnosis, or when the power has not been turned off for 10 seconds or more.
REMEDY · Step by step
How to fix it?
- 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
Related manual page
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