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US 12,060,994 B2Granted
Using diode rectification to determine igniter, inducer relay, and igniter relay faults
AssigneeCopeland Comfort Control LP
InventorHarshal Manik Pawar
Life of this patent
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AssigneeCopeland Comfort Control LP
InventorHarshal Manik Pawar
Estimating the term…
Exemplary embodiments are disclosed of controls including circuit assemblies configured for determining igniter, inducer relay, and igniter relay faults. In exemplary embodiments, a control for a system includes an input configured to receive a control signal, an inducer relay, an igniter relay, and a circuit assembly. The circuit assembly is configured to be coupled to the inducer relay, the igniter relay, and an igniter of the system. The circuit assembly comprises a plurality of diodes and is configured to enable detection of and distinguishing between a failure of the igniter, a failure of the inducer relay, and a failure of the igniter relay as determined by a waveform of the control signal at the input of the control for a given one of a plurality of operational states of the control.
A circuit assembly comprising a plurality of diodes, the circuit assembly configured to be coupled to an inducer relay, an igniter relay, and an igniter such that diode rectification is usable for detecting and distinguishing between a failure of the igniter, a failure of the inducer relay, and a failure of the igniter relay for a given one of a plurality of operational states as determined by whether a waveform of a signal at an input is a full cycle waveform, a positive half cycle waveform, or a negative half cycle waveform.
A circuit assembly comprising a plurality of diodes, the circuit assembly configured to be coupled to an inducer relay, an igniter relay, and an igniter to enable detection of and distinguishing between a failure of the igniter, a failure of the inducer relay, and a failure of the igniter relay as determined by a waveform of a signal at an input for a given one of a plurality of operational states including an idle state, a pre-purge state, and an igniter warm-up state.
A method of determining inducer relay, igniter relay, and igniter failures with a circuit assembly comprising a plurality of diodes and configured to be coupled to an inducer relay, an igniter relay, and an igniter, the method comprising using diode rectification to detect and distinguish between a failure of an igniter, a failure of the inducer relay, and a failure of the igniter relay by determining whether a waveform of a signal at an input is a full cycle waveform, a positive half cycle waveform, or a negative half cycle waveform for a given one of a plurality of operational states.
Dependencies are inferred from the claim text.