InverterFR-F800Verification pending — cross-check with the official manual
FR-F800 E.OC3 — Overcurrent trip during deceleration or stop
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 deceleration (other than acceleration or constant speed), the protection circuit is activated and the inverter trips. Check for sudden speed reduction. Check for output short-circuit. Check for too fast operation of the motor's mechanical brake. Check if the st
REMEDY · Step by step
How to fix it?
- Set the deceleration time longer. Check the wiring to make sure that output short circuit does not occur. Check the mechanical brake operation. 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
- Alternativel
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.