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Diagnostic system and method for a cooling system

  • US 6,679,072 B2
  • Filed: 11/27/2002
  • Issued: 01/20/2004
  • Est. Priority Date: 06/07/1995
  • Status: Expired due to Fees
First Claim
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1. A diagnostic system for a cooling system including a compressor, evaporator and condenser in fluid communication, the diagnostic system comprising:

  • a controller associated with a regulator valve and producing a control signal for adjusting a valve position of said regulator valve as a function of demand for cooling;

    an ambient temperature sensor associated with the cooling system and operable to provide an ambient temperature measurement to said controller;

    an evaporator coil inlet temperature sensor associated with the cooling system and operable to provide coil inlet temperature measurement to said controller;

    an evaporator coil exit temperature sensor associated with the cooling system and operable to provide a coil exit temperature measurement to said controller;

    a diagnostic module coupled to said controller for monitoring and comparing a valve position and at least one of said ambient temperature measurement, coil inlet temperature measurement and coil exit temperature measurement with at least one predetermined fault value indicative of a fault condition.

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