Mitsubishi Electric · FR-A800 Variable Speed Drive (Separated Converter)
This fault indicates an issue with the analog input signal received by the FR-A800 inverter. This can affect speed reference, feedback, or other control signals dependent on analog input.
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Verify the wiring of the analog input terminals (e.g., 2, 4, 5, B, C) for secure connections and continuity.
Measure the analog input voltage or current at the FR-A800 terminals using a multimeter to ensure it is within the specified range (e.g., 0-10VDC, 4-20mA).
Check the external device providing the analog signal for proper operation and calibration.
Inspect the analog input wiring for any signs of damage, short circuits, or ground faults.
Ensure that the analog input parameter settings (e.g., Pr.73, Pr.74 for analog input scaling, Pr.59, Pr.128, Pr.129 for input selection) are correct for the application.