Stall Prevention Trip
Mitsubishi · D700 Inverter
What does E.OLT mean?
This fault occurs when the inverter's output frequency drops to 1Hz due to stall prevention operation and remains at that level for 3 seconds, ultimately leading to an inverter trip. The display shows "OL" during active stall prevention. This indicates that the motor is experiencing a continuous overload condition that the stall prevention function cannot overcome. Sustained overload can lead to motor and inverter damage.
Additional Steps
Steps 1–2 are listed in Priority Fix.
- 3
Review the Pr. 22 (Stall prevention operation level) setting; adjust it if necessary, but be cautious not to set it too high, which could allow sustained overload.
- 4
Consider upsizing the motor or inverter if the load conditions are consistently at the limit of the current setup.