InverterFR-F800Verification pending — cross-check with the official manual
FR-F800 E.OC1 — Overcurrent trip during acceleration
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 acceleration, the protection circuit is activated and the inverter trips. Check for sudden speed acceleration. Check if the downward acceleration time is too long in a lift application. Check for output short-circuit. Check that the Pr
- 3 "Base frequency" setti
REMEDY · Step by step
How to fix it?
- Set the acceleration time longer. (Shorten the downward acceleration time of the lift.) If "E.OC1" always appears at start, disconnect the motor once and restart the inverter
- If "E.OC1" still appears, contact your sales representative. Check the wiring to make sure that output short circuit does not occur. Set 50 Hz in Pr
- 3 "Base frequency". (Refer to page 5-517.) Lower the stall preve
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.