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Pump controller system and method

DC CAFC
  • US 7,857,600 B2
  • Filed: 10/31/2007
  • Issued: 12/28/2010
  • Est. Priority Date: 12/08/2003
  • Status: Expired due to Fees
First Claim
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1. A method of detecting a foreign object obstruction in a pool or spa, the pool or spa being coupled to a pump and a motor, the method comprising:

  • measuring a voltage and a current being provided to the motor;

    determining a power factor based on the voltage and the current;

    determining whether a fault condition has occurred due to the presence of a foreign object obstruction in the pool or spa based on the voltage, the current, and the power factor;

    shutting down the motor when the fault condition has occurred; and

    indicating to a user that the fault condition has occurred.

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