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Siemens Micromaster 440 or MM440 Drive
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Jun 11, 2022 1:14 pm
How can resolve problem F0021 fault in siemens micromaster 440 or MM440 drive ?
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Jun 11, 2022 1:15 pm
Cause : Earth fault. Fault occurs if the sum of the phase currents is higher than 5 % of the nominal inverter current.
Check drive hardware.