Siemens A0590 fault code meaning
Siemens / A0590
Series: MM430
Speed encoder no-signal alarm
converter
Meaning: No speed encoder signal.
Possible causes
Source: Parameter List_ MICROMASTER 430 P261
Series: MM440
Speed encoder no-signal alarm
converter
Meaning: No speed encoder signal. The converter has switched to sensorless vector control.
Possible causes
Source: Parameter Table_ MICROMASTER 440 P321