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Method and apparatus for predictive maintenance of HVACR systems

  • US 5,596,507 A
  • Filed: 08/15/1994
  • Issued: 01/21/1997
  • Est. Priority Date: 08/15/1994
  • Status: Expired due to Term
First Claim
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1. A computer-assisted method of performing predictive maintenance on a heating, ventilation, air-conditioning and/or refrigeration (HVACR) system, the method comprising the steps of:

  • storing a plurality of defined HVACR system parameters--in a memory location in the computer, such defined parameters including system temperature and system pressure parameters;

    defining at least one preventive maintenance instruction;

    storing said instruction(s) in a computer-accessible memory;

    measuring a HVACR system variable which corresponds to at least one stored system parameter;

    comparing the defined parameter with the system variable to assess whether the variable is sufficiently highly correlated with the system parameter;

    responsive to said comparing, accessing at least one of said stored instructions if the system parameter and the measured variable are not sufficiently highly correlated; and

    displaying said accessed instruction(s) so that a user will understand the type of maintenance required.

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