InverterFR-F800Verification pending — cross-check with the official manual
FR-F800 E.OV1 — Regenerative overvoltage trip during acceleration
Trip — immediate stop
CAUSE
Why does it occur?
- If regenerative power causes the inverter's internal main circuit DC voltage to reach or exceed the specified value, the protection circuit is activated to stop the inverter output
- The circuit may also be activated by a surge voltage produced in the power supply system. Check for too slow acceleration. (e.g. during downward acceleration in vertical lift load) Check that the Pr
- 22 "Stall prev
REMEDY · Step by step
How to fix it?
- Set the acceleration time shorter. Use the regeneration avoidance function (Pr. 882 to Pr. 886). (Refer to page 5-540.) Set a value larger than the no load current in Pr.
- Set Pr. 154 "Voltage reduction selection during stall prevention operation" = "10, 11". (Refer to page 5-175.)
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.
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