Siemens 6RA70 DC Drive
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Jun 13, 2022 8:55 am
How can resolve problem A027 alarm in siemens 6RA70 DC Drive ?
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Jun 13, 2022 8:56 am
Cause : Air flow monitoring (active in operating states of < o6) When parameter P497=1 (air flow monitoring): Alarm in response to log. “0” signal (longer than 40s) at terminal 213
Possible causes
♦ Encoder for fan monitoring has responded
♦ Interruption in encoder cable
