Mitsubishi FR-A Series- FR-A800, FR-A770/A701, FR-A700, FR-A800-E, FR-A741 Drive
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Mar 30, 2024 4:50 am
Cause : PTC thermistor operation comes when the inverter trips if resistance of the PTC thermistor connected between the terminal 2 and terminal 10 has reached the Pr.561 PTC thermistor protection level setting or higher. When the initial value (Pr.561 = "9999") is set, this protective function is not available.
- Check the connection with the PTC thermistor.
- Check the Pr.561 setting.
- Check the motor for operation under overload.
- Reduce the load.
