Mitsubishi Electric · Mitsubishi FR-E800 Variable Frequency Drive
The inverter output is shut off due to a fault in the brake circuit, typically indicating damage to the brake transistor. This is a critical internal hardware fault requiring immediate attention to prevent further damage.
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Reduce the load inertia to minimize demands on the regenerative braking circuit.
Check that the brake duty cycle is proper for the application, ensuring it does not exceed the inverter's capabilities.
Replace the entire inverter as this fault often signifies irreparable internal damage.