Mitsubishi FR-F Series- FR-F800, FR-F800-E, FR-F846-E2 & FR-F700 Drive
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Mar 30, 2024 6:33 am
Cause : Pre-charge fault comes when the inverter trips when the pre-charge time exceeds Pr.764 Pre-charge time limit. The inverter trips when the measured value exceeds Pr.763 Pre-charge upper detection level during pre-charging.
This function is available when Pr.764 and Pr.763 are set. This protective function is not available in the initial status.
- Check that the Pr.764 setting is not too short.
- Check that the Pr.763 setting is not too small.
- Check that the Pr.127 PID control automatic switchover frequency setting is not too low.
- Check for a break in the connection to the pump.
