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Performing integrity checks on climate control system components

  • US 9,518,763 B2
  • Filed: 11/28/2012
  • Issued: 12/13/2016
  • Est. Priority Date: 11/09/2012
  • Status: Active Grant
First Claim
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1. A method performed by a controller of a climate control system having an igniter and an igniter relay, the method comprising:

  • in one or more of a plurality of heating operational phases of the system, sensing current draw by the igniter and sensing voltage between terminals of a second relay of the system, where the current draw is sensed by a current sensing circuit connected across the igniter, the current draw sensing being performed independently of the igniter relay;

    for a given one of the heating operational phases in which the sensing is performed, comparing the sensed current and voltage with a current value and voltage value predetermined together for the igniter and second relay in relation to the given operational phase to indicate the presence of a condition specifically of the igniter, of the second relay, or of the igniter relay, the comparing performed using a processor; and

    based on the comparing, distinguishing between a failure of one of the relays and a failure of the igniter.

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