InverterFR-E800Verification pending — cross-check with the official manual
FR-E800 E.OLT — Stall prevention STP
Trip — immediate stop
CAUSE
Why does it occur?
- If the output frequency has fallen to 1.0 Hz by stall prevention operation and remains for 3 seconds, a fault (E.OLT) appears and the inverter is shut off
- OLC or OLV appears while stall prevention is being activated
- When speed control is performed, a fault (E.OLT) appears and the inverter output is shut off if frequency drops to the Pr.865 Low speed detection (initial value is 1.5 Hz) setting by
REMEDY · Step by step
How to fix it?
• Reduce the load. • Change the Pr.22, Pr.865, and Pr.874 values. (Check the Pr.22 setting under V/F control and Advanced magnetic flux vector control.) • For the test operation without connecting a motor, select the PM sensorless vector control test operation. • Also check that the stall prevention (overcurrent) warning (OLC) or the stall prevention (overvoltage) warning (OLV) countermeasure is t
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.