A1009 alarm in Siemens V70 Drive

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A1009 alarm in Siemens V70 Drive indicates Control module overtemperature. This means the internal temperature of the control unit board is approaching its maximum limit, warning of a potential failure if cooling isn't improved. Cause: The temperature of the control module (Control Unit) has exceeded the specified limit value.

Remedy:
  • Check the air intake for the Control Unit.
  • Check the Control Unit fan.
Note: The alarm automatically disappears after the limit value has been undershot.

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