InverterS300Verification pending — cross-check with the official manual
S300 OutputPhase — OutputPhase U Open / V Open
Trip — immediate stop
CAUSE
Why does it occur?
- Occurs when one phase of the inverter three-phase output is lost
- It operates only when the PRT-12 (Out Phase Open Chk) code is set to 1 (Yes)
REMEDY · Step by step
How to fix it?
Check the U/V/W output cable connections and contacts, and repair the lost phase.
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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