InverterFR-F800Verification pending — cross-check with the official manual
FR-F800 E.OC2 — Overcurrent trip during constant speed
Trip — immediate stop
CAUSE
Why does it occur?
- When the inverter output current reaches or exceeds approximately 170% (LD rating) / 148% (SLD rating) of the rated current during constant-speed operation, the protection circuit is activated and the inverter trips. Check for sudden load change. Check for output short-circuit. Check if the stall prevention operation level is set too high
- Check if the fast-response current limit operation i
REMEDY · Step by step
How to fix it?
- Keep the load stable. Check the wiring to make sure that output short circuit does not occur. Lower the stall prevention operation level
- Activate the fast-response current limit operation. (Refer to page 5-175.) Choose inverter and motor capacities that match. (PM motor control) Input a start command after the motor stops
- Alternatively, use the automatic restart after instantaneous pow
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
Summary based on the official Mitsubishi Electric manual. For accurate and complete information, always consult the official manual.