Mitsubishi FR-A Series- FR-A800, FR-A770/A701, FR-A700, FR-A800-E, FR-A741 Drive
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Apr 01, 2024 7:24 am
Cause : PTC thermistor operation comes when the motor overheat status is detected for 10s or more by the external
PTC thermistor input connected to the terminal AU.
This fault is available when "63" is set in Pr. 184 AU terminal function selection and AU/PTC switchover switch is set in PTC side. When the initial value (Pr. 184 = "4") is set, this protective function is not available.
- Check the connection between the PTC thermistor switch and thermal protector.
- Check the motor for operation under overload.
